✏️ Leetcode Solutions with Cpp,Python,Python3

Update time: 2022-10-21 20:38:48 Auto created by leetcode_generate I have solved 107 / 2216 problems while there are 337 problems still locked. If you want to use this tool please follow this Usage Guide If you have any question, please give me an issue. If you are loving solving problems in leetcode, please contact me to enjoy it together! (Notes: 🔒 means you need to buy a book from Leetcode to unlock the problem)

#	Title	My Solution	Official Solution	Difficulty
1	two-sum	Python3	📝	Easy
2	add-two-numbers		📝	Medium
3	longest-substring-without-repeating-characters	Python3	📝	Medium
4	median-of-two-sorted-arrays			Hard
5	longest-palindromic-substring		📝	Medium
6	zigzag-conversion		📝	Medium
7	reverse-integer		📝	Medium
8	string-to-integer-atoi		📝	Medium
9	palindrome-number	Python3	📝	Easy
10	regular-expression-matching		📝	Hard
11	container-with-most-water		📝	Medium
12	integer-to-roman	Python3	📝	Medium
13	roman-to-integer	Cpp Python3	📝	Easy
14	longest-common-prefix	Python3	📝	Easy
15	3sum	Python3	📝	Medium
16	3sum-closest		📝	Medium
17	letter-combinations-of-a-phone-number		📝	Medium
18	4sum		📝	Medium
19	remove-nth-node-from-end-of-list		📝	Medium
20	valid-parentheses	Python3	📝	Easy
21	merge-two-sorted-lists	Python3	📝	Easy
22	generate-parentheses	Cpp	📝	Medium
23	merge-k-sorted-lists		📝	Hard
24	swap-nodes-in-pairs		📝	Medium
25	reverse-nodes-in-k-group		📝	Hard
26	remove-duplicates-from-sorted-array		📝	Easy
27	remove-element		📝	Easy
28	find-the-index-of-the-first-occurrence-in-a-string		📝	Medium
29	divide-two-integers		📝	Medium
30	substring-with-concatenation-of-all-words		📝	Hard
31	next-permutation		📝	Medium
32	longest-valid-parentheses		📝	Hard
33	search-in-rotated-sorted-array		📝	Medium
34	find-first-and-last-position-of-element-in-sorted-array		📝	Medium
35	search-insert-position		📝	Easy
36	valid-sudoku		📝	Medium
37	sudoku-solver		📝	Hard
38	count-and-say		📝	Medium
39	combination-sum		📝	Medium
40	combination-sum-ii		📝	Medium
41	first-missing-positive		📝	Hard
42	trapping-rain-water		📝	Hard
43	multiply-strings	Cpp	📝	Medium
44	wildcard-matching		📝	Hard
45	jump-game-ii		📝	Medium
46	permutations		📝	Medium
47	permutations-ii		📝	Medium
48	rotate-image	Cpp	📝	Medium
49	group-anagrams		📝	Medium
50	powx-n	Cpp	📝	Medium
51	n-queens		📝	Hard
52	n-queens-ii		📝	Hard
53	maximum-subarray	Cpp Python3	📝	Medium
54	spiral-matrix		📝	Medium
55	jump-game		📝	Medium
56	merge-intervals		📝	Medium
57	insert-interval	Cpp Python3	📝	Medium
58	length-of-last-word		📝	Easy
59	spiral-matrix-ii		📝	Medium
60	permutation-sequence		📝	Hard
61	rotate-list		📝	Medium
62	unique-paths		📝	Medium
63	unique-paths-ii		📝	Medium
64	minimum-path-sum		📝	Medium
65	valid-number	Cpp	📝	Hard
66	plus-one		📝	Easy
67	add-binary	Python3	📝	Easy
68	text-justification	Cpp		Hard
69	sqrtx		📝	Easy
70	climbing-stairs	Python3	📝	Easy
71	simplify-path		📝	Medium
72	edit-distance		📝	Hard
73	set-matrix-zeroes		📝	Medium
74	search-a-2d-matrix		📝	Medium
75	sort-colors	Python3	📝	Medium
76	minimum-window-substring		📝	Hard
77	combinations		📝	Medium
78	subsets	Cpp	📝	Medium
79	word-search		📝	Medium
80	remove-duplicates-from-sorted-array-ii		📝	Medium
81	search-in-rotated-sorted-array-ii		📝	Medium
82	remove-duplicates-from-sorted-list-ii		📝	Medium
83	remove-duplicates-from-sorted-list		📝	Easy
84	largest-rectangle-in-histogram		📝	Hard
85	maximal-rectangle		📝	Hard
86	partition-list		📝	Medium
87	scramble-string			Hard
88	merge-sorted-array		📝	Easy
89	gray-code		📝	Medium
90	subsets-ii		📝	Medium
91	decode-ways		📝	Medium
92	reverse-linked-list-ii		📝	Medium
93	restore-ip-addresses		📝	Medium
94	binary-tree-inorder-traversal	Python3	📝	Easy
95	unique-binary-search-trees-ii		📝	Medium
96	unique-binary-search-trees		📝	Medium
97	interleaving-string		📝	Medium
98	validate-binary-search-tree	Cpp	📝	Medium
99	recover-binary-search-tree		📝	Medium
100	same-tree	Python3	📝	Easy
101	symmetric-tree	Cpp Python3	📝	Easy
102	binary-tree-level-order-traversal	Python3 Cpp	📝	Medium
103	binary-tree-zigzag-level-order-traversal		📝	Medium
104	maximum-depth-of-binary-tree	Python3	📝	Easy
105	construct-binary-tree-from-preorder-and-inorder-traversal		📝	Medium
106	construct-binary-tree-from-inorder-and-postorder-traversal		📝	Medium
107	binary-tree-level-order-traversal-ii		📝	Medium
108	convert-sorted-array-to-binary-search-tree	Python3	📝	Easy
109	convert-sorted-list-to-binary-search-tree		📝	Medium
110	balanced-binary-tree	Python3	📝	Easy
111	minimum-depth-of-binary-tree		📝	Easy
112	path-sum		📝	Easy
113	path-sum-ii		📝	Medium
114	flatten-binary-tree-to-linked-list		📝	Medium
115	distinct-subsequences		📝	Hard
116	populating-next-right-pointers-in-each-node		📝	Medium
117	populating-next-right-pointers-in-each-node-ii		📝	Medium
118	pascals-triangle		📝	Easy
119	pascals-triangle-ii		📝	Easy
120	triangle		📝	Medium
121	best-time-to-buy-and-sell-stock	Cpp Python3	📝	Easy
122	best-time-to-buy-and-sell-stock-ii	Python3	📝	Medium
123	best-time-to-buy-and-sell-stock-iii		📝	Hard
124	binary-tree-maximum-path-sum		📝	Hard
125	valid-palindrome	Python3	📝	Easy
126	word-ladder-ii		📝	Hard
127	word-ladder		📝	Hard
128	longest-consecutive-sequence		📝	Medium
129	sum-root-to-leaf-numbers		📝	Medium
130	surrounded-regions		📝	Medium
131	palindrome-partitioning		📝	Medium
132	palindrome-partitioning-ii		📝	Hard
133	clone-graph	Python3	📝	Medium
134	gas-station		📝	Medium
135	candy		📝	Hard
136	single-number	Python3	📝	Easy
137	single-number-ii		📝	Medium
138	copy-list-with-random-pointer		📝	Medium
139	word-break	Cpp	📝	Medium
140	word-break-ii		📝	Hard
141	linked-list-cycle	Python3	📝	Easy
142	linked-list-cycle-ii		📝	Medium
143	reorder-list		📝	Medium
144	binary-tree-preorder-traversal	Python3	📝	Easy
145	binary-tree-postorder-traversal	Python3	📝	Easy
146	lru-cache		📝	Medium
147	insertion-sort-list		📝	Medium
148	sort-list	Cpp	📝	Medium
149	max-points-on-a-line	Cpp	📝	Hard
150	evaluate-reverse-polish-notation	Python3	📝	Medium
151	reverse-words-in-a-string		📝	Medium
152	maximum-product-subarray		📝	Medium
153	find-minimum-in-rotated-sorted-array		📝	Medium
154	find-minimum-in-rotated-sorted-array-ii		📝	Hard
155	min-stack		📝	Medium
156	binary-tree-upside-down	🔒		Medium
157	read-n-characters-given-read4	🔒	📝	Easy
158	read-n-characters-given-read4-ii-call-multiple-times	🔒		Hard
159	longest-substring-with-at-most-two-distinct-characters	🔒	📝	Medium
160	intersection-of-two-linked-lists		📝	Easy
161	one-edit-distance	🔒	📝	Medium
162	find-peak-element		📝	Medium
163	missing-ranges	🔒	📝	Easy
164	maximum-gap		📝	Hard
165	compare-version-numbers		📝	Medium
166	fraction-to-recurring-decimal		📝	Medium
167	two-sum-ii-input-array-is-sorted		📝	Medium
168	excel-sheet-column-title			Easy
169	majority-element	Python3	📝	Easy
170	two-sum-iii-data-structure-design	🔒	📝	Easy
171	excel-sheet-column-number		📝	Easy
172	factorial-trailing-zeroes		📝	Medium
173	binary-search-tree-iterator		📝	Medium
174	dungeon-game		📝	Hard
179	largest-number	Python3	📝	Medium
186	reverse-words-in-a-string-ii	🔒	📝	Medium
187	repeated-dna-sequences		📝	Medium
188	best-time-to-buy-and-sell-stock-iv		📝	Hard
189	rotate-array		📝	Medium
190	reverse-bits	Python3	📝	Easy
191	number-of-1-bits	Python3	📝	Easy
198	house-robber		📝	Medium
199	binary-tree-right-side-view		📝	Medium
200	number-of-islands		📝	Medium
201	bitwise-and-of-numbers-range		📝	Medium
202	happy-number		📝	Easy
203	remove-linked-list-elements		📝	Easy
204	count-primes		📝	Medium
205	isomorphic-strings	Cpp	📝	Easy
206	reverse-linked-list	Cpp Python3	📝	Easy
207	course-schedule	Python3	📝	Medium
208	implement-trie-prefix-tree	Python3	📝	Medium
209	minimum-size-subarray-sum		📝	Medium
210	course-schedule-ii	Python3	📝	Medium
211	design-add-and-search-words-data-structure		📝	Medium
212	word-search-ii		📝	Hard
213	house-robber-ii		📝	Medium
214	shortest-palindrome		📝	Hard
215	kth-largest-element-in-an-array	Cpp	📝	Medium
216	combination-sum-iii		📝	Medium
217	contains-duplicate	Python3	📝	Easy
218	the-skyline-problem		📝	Hard
219	contains-duplicate-ii		📝	Easy
220	contains-duplicate-iii		📝	Hard
221	maximal-square		📝	Medium
222	count-complete-tree-nodes		📝	Medium
223	rectangle-area		📝	Medium
224	basic-calculator		📝	Hard
225	implement-stack-using-queues		📝	Easy
226	invert-binary-tree	Python3	📝	Easy
227	basic-calculator-ii		📝	Medium
228	summary-ranges		📝	Easy
229	majority-element-ii		📝	Medium
230	kth-smallest-element-in-a-bst		📝	Medium
231	power-of-two		📝	Easy
232	implement-queue-using-stacks	Python3	📝	Easy
233	number-of-digit-one		📝	Hard
234	palindrome-linked-list	Python3	📝	Easy
235	lowest-common-ancestor-of-a-binary-search-tree	Python3	📝	Medium
236	lowest-common-ancestor-of-a-binary-tree		📝	Medium
237	delete-node-in-a-linked-list		📝	Medium
238	product-of-array-except-self	Python3	📝	Medium
239	sliding-window-maximum		📝	Hard
240	search-a-2d-matrix-ii	Cpp	📝	Medium
241	different-ways-to-add-parentheses			Medium
242	valid-anagram	Python3	📝	Easy
243	shortest-word-distance	🔒	📝	Easy
244	shortest-word-distance-ii	🔒	📝	Medium
245	shortest-word-distance-iii	🔒		Medium
246	strobogrammatic-number	🔒	📝	Easy
247	strobogrammatic-number-ii	🔒	📝	Medium
248	strobogrammatic-number-iii	🔒		Hard
249	group-shifted-strings	🔒	📝	Medium
250	count-univalue-subtrees	🔒	📝	Medium
251	flatten-2d-vector	🔒	📝	Medium
252	meeting-rooms	🔒	📝	Easy
253	meeting-rooms-ii	🔒	📝	Medium
254	factor-combinations	🔒		Medium
255	verify-preorder-sequence-in-binary-search-tree	🔒		Medium
256	paint-house	🔒	📝	Medium
257	binary-tree-paths		📝	Easy
258	add-digits		📝	Easy
259	3sum-smaller	🔒	📝	Medium
260	single-number-iii		📝	Medium
261	graph-valid-tree	🔒	📝	Medium
263	ugly-number		📝	Easy
264	ugly-number-ii		📝	Medium
265	paint-house-ii	🔒	📝	Hard
266	palindrome-permutation	🔒	📝	Easy
267	palindrome-permutation-ii	🔒	📝	Medium
268	missing-number	Python3	📝	Easy
269	alien-dictionary	🔒	📝	Hard
270	closest-binary-search-tree-value	🔒	📝	Easy
271	encode-and-decode-strings	🔒	📝	Medium
272	closest-binary-search-tree-value-ii	🔒	📝	Hard
273	integer-to-english-words		📝	Hard
274	h-index		📝	Medium
275	h-index-ii		📝	Medium
276	paint-fence	🔒	📝	Medium
277	find-the-celebrity	🔒	📝	Medium
278	first-bad-version	Python3	📝	Easy
279	perfect-squares		📝	Medium
280	wiggle-sort	🔒	📝	Medium
281	zigzag-iterator	🔒	📝	Medium
282	expression-add-operators		📝	Hard
283	move-zeroes	Python3	📝	Easy
284	peeking-iterator		📝	Medium
285	inorder-successor-in-bst	🔒	📝	Medium
286	walls-and-gates	🔒	📝	Medium
287	find-the-duplicate-number		📝	Medium
288	unique-word-abbreviation	🔒	📝	Medium
289	game-of-life		📝	Medium
290	word-pattern		📝	Easy
291	word-pattern-ii	🔒		Medium
292	nim-game		📝	Easy
293	flip-game	🔒		Easy
294	flip-game-ii	🔒		Medium
295	find-median-from-data-stream		📝	Hard
296	best-meeting-point	🔒	📝	Hard
297	serialize-and-deserialize-binary-tree	Cpp	📝	Hard
298	binary-tree-longest-consecutive-sequence	🔒	📝	Medium
299	bulls-and-cows		📝	Medium
300	longest-increasing-subsequence		📝	Medium
301	remove-invalid-parentheses		📝	Hard
302	smallest-rectangle-enclosing-black-pixels	🔒	📝	Hard
303	range-sum-query-immutable		📝	Easy
304	range-sum-query-2d-immutable		📝	Medium
305	number-of-islands-ii	🔒	📝	Hard
306	additive-number			Medium
307	range-sum-query-mutable		📝	Medium
308	range-sum-query-2d-mutable	🔒	📝	Hard
309	best-time-to-buy-and-sell-stock-with-cooldown		📝	Medium
310	minimum-height-trees		📝	Medium
311	sparse-matrix-multiplication	🔒	📝	Medium
312	burst-balloons		📝	Hard
313	super-ugly-number			Medium
314	binary-tree-vertical-order-traversal	🔒	📝	Medium
315	count-of-smaller-numbers-after-self		📝	Hard
316	remove-duplicate-letters		📝	Medium
317	shortest-distance-from-all-buildings	🔒	📝	Hard
318	maximum-product-of-word-lengths		📝	Medium
319	bulb-switcher			Medium
320	generalized-abbreviation	🔒	📝	Medium
321	create-maximum-number			Hard
322	coin-change	Python3	📝	Medium
323	number-of-connected-components-in-an-undirected-graph	🔒	📝	Medium
324	wiggle-sort-ii			Medium
325	maximum-size-subarray-sum-equals-k	🔒	📝	Medium
326	power-of-three		📝	Easy
327	count-of-range-sum			Hard
328	odd-even-linked-list		📝	Medium
329	longest-increasing-path-in-a-matrix		📝	Hard
330	patching-array		📝	Hard
331	verify-preorder-serialization-of-a-binary-tree		📝	Medium
332	reconstruct-itinerary		📝	Hard
333	largest-bst-subtree	🔒	📝	Medium
334	increasing-triplet-subsequence		📝	Medium
335	self-crossing			Hard
336	palindrome-pairs		📝	Hard
337	house-robber-iii		📝	Medium
338	counting-bits	Python3	📝	Easy
339	nested-list-weight-sum	🔒	📝	Medium
340	longest-substring-with-at-most-k-distinct-characters	🔒	📝	Medium
341	flatten-nested-list-iterator		📝	Medium
342	power-of-four		📝	Easy
343	integer-break			Medium
344	reverse-string		📝	Easy
345	reverse-vowels-of-a-string		📝	Easy
346	moving-average-from-data-stream	🔒	📝	Easy
347	top-k-frequent-elements		📝	Medium
348	design-tic-tac-toe	🔒	📝	Medium
349	intersection-of-two-arrays		📝	Easy
350	intersection-of-two-arrays-ii		📝	Easy
351	android-unlock-patterns	🔒	📝	Medium
352	data-stream-as-disjoint-intervals			Hard
353	design-snake-game	🔒	📝	Medium
354	russian-doll-envelopes		📝	Hard
355	design-twitter			Medium
356	line-reflection	🔒		Medium
357	count-numbers-with-unique-digits			Medium
358	rearrange-string-k-distance-apart	🔒		Hard
359	logger-rate-limiter	🔒	📝	Easy
360	sort-transformed-array	🔒		Medium
361	bomb-enemy	🔒	📝	Medium
362	design-hit-counter	🔒	📝	Medium
363	max-sum-of-rectangle-no-larger-than-k		📝	Hard
364	nested-list-weight-sum-ii	🔒	📝	Medium
365	water-and-jug-problem			Medium
366	find-leaves-of-binary-tree	🔒	📝	Medium
367	valid-perfect-square		📝	Easy
368	largest-divisible-subset		📝	Medium
369	plus-one-linked-list	🔒	📝	Medium
370	range-addition	🔒	📝	Medium
371	sum-of-two-integers		📝	Medium
372	super-pow			Medium
373	find-k-pairs-with-smallest-sums			Medium
374	guess-number-higher-or-lower		📝	Easy
375	guess-number-higher-or-lower-ii		📝	Medium
376	wiggle-subsequence		📝	Medium
377	combination-sum-iv		📝	Medium
378	kth-smallest-element-in-a-sorted-matrix	Cpp	📝	Medium
379	design-phone-directory	🔒		Medium
380	insert-delete-getrandom-o1		📝	Medium
381	insert-delete-getrandom-o1-duplicates-allowed		📝	Hard
382	linked-list-random-node		📝	Medium
383	ransom-note	Python3	📝	Easy
384	shuffle-an-array		📝	Medium
385	mini-parser			Medium
386	lexicographical-numbers			Medium
387	first-unique-character-in-a-string		📝	Easy
388	longest-absolute-file-path			Medium
389	find-the-difference		📝	Easy
390	elimination-game			Medium
391	perfect-rectangle			Hard
392	is-subsequence		📝	Easy
393	utf-8-validation		📝	Medium
394	decode-string		📝	Medium
395	longest-substring-with-at-least-k-repeating-characters		📝	Medium
396	rotate-function			Medium
397	integer-replacement			Medium
398	random-pick-index		📝	Medium
399	evaluate-division	Python3	📝	Medium
400	nth-digit			Medium
401	binary-watch			Easy
402	remove-k-digits		📝	Medium
403	frog-jump		📝	Hard
404	sum-of-left-leaves		📝	Easy
405	convert-a-number-to-hexadecimal			Easy
406	queue-reconstruction-by-height		📝	Medium
407	trapping-rain-water-ii			Hard
408	valid-word-abbreviation	🔒		Easy
409	longest-palindrome	Python3	📝	Easy
410	split-array-largest-sum		📝	Hard
411	minimum-unique-word-abbreviation	🔒		Hard
412	fizz-buzz		📝	Easy
413	arithmetic-slices		📝	Medium
414	third-maximum-number		📝	Easy
415	add-strings		📝	Easy
416	partition-equal-subset-sum		📝	Medium
417	pacific-atlantic-water-flow		📝	Medium
418	sentence-screen-fitting	🔒		Medium
419	battleships-in-a-board			Medium
420	strong-password-checker			Hard
421	maximum-xor-of-two-numbers-in-an-array		📝	Medium
422	valid-word-square	🔒		Easy
423	reconstruct-original-digits-from-english		📝	Medium
424	longest-repeating-character-replacement			Medium
425	word-squares	🔒	📝	Hard
432	all-oone-data-structure			Hard
433	minimum-genetic-mutation		📝	Medium
434	number-of-segments-in-a-string		📝	Easy
435	non-overlapping-intervals		📝	Medium
436	find-right-interval		📝	Medium
437	path-sum-iii		📝	Medium
438	find-all-anagrams-in-a-string		📝	Medium
439	ternary-expression-parser	🔒		Medium
440	k-th-smallest-in-lexicographical-order			Hard
441	arranging-coins		📝	Easy
442	find-all-duplicates-in-an-array		📝	Medium
443	string-compression		📝	Medium
444	sequence-reconstruction	🔒		Medium
445	add-two-numbers-ii		📝	Medium
446	arithmetic-slices-ii-subsequence		📝	Hard
447	number-of-boomerangs			Medium
448	find-all-numbers-disappeared-in-an-array		📝	Easy
449	serialize-and-deserialize-bst		📝	Medium
450	delete-node-in-a-bst		📝	Medium
451	sort-characters-by-frequency		📝	Medium
452	minimum-number-of-arrows-to-burst-balloons		📝	Medium
453	minimum-moves-to-equal-array-elements		📝	Medium
454	4sum-ii	Cpp	📝	Medium
455	assign-cookies			Easy
456	132-pattern		📝	Medium
457	circular-array-loop			Medium
458	poor-pigs		📝	Hard
459	repeated-substring-pattern		📝	Easy
460	lfu-cache			Hard
461	hamming-distance		📝	Easy
462	minimum-moves-to-equal-array-elements-ii		📝	Medium
463	island-perimeter		📝	Easy
464	can-i-win	Cpp		Medium
465	optimal-account-balancing	🔒		Hard
466	count-the-repetitions		📝	Hard
467	unique-substrings-in-wraparound-string			Medium
468	validate-ip-address		📝	Medium
469	convex-polygon	🔒		Medium
471	encode-string-with-shortest-length	🔒		Hard
472	concatenated-words			Hard
473	matchsticks-to-square		📝	Medium
474	ones-and-zeroes		📝	Medium
475	heaters			Medium
476	number-complement		📝	Easy
477	total-hamming-distance		📝	Medium
479	largest-palindrome-product			Hard
480	sliding-window-median		📝	Hard
481	magical-string			Medium
482	license-key-formatting			Easy
483	smallest-good-base			Hard
484	find-permutation	🔒	📝	Medium
485	max-consecutive-ones		📝	Easy
486	predict-the-winner		📝	Medium
487	max-consecutive-ones-ii	🔒	📝	Medium
488	zuma-game			Hard
489	kth-smallest-instructions			Hard
490	the-maze	🔒	📝	Medium
491	increasing-subsequences			Medium
492	construct-the-rectangle			Easy
493	reverse-pairs		📝	Hard
494	target-sum		📝	Medium
495	teemo-attacking		📝	Easy
496	next-greater-element-i		📝	Easy
498	diagonal-traverse		📝	Medium
499	the-maze-iii	🔒		Hard
500	keyboard-row			Easy
501	find-mode-in-binary-search-tree			Easy
502	ipo		📝	Hard
503	next-greater-element-ii		📝	Medium
504	base-7			Easy
505	the-maze-ii	🔒	📝	Medium
506	relative-ranks			Easy
507	perfect-number		📝	Easy
508	most-frequent-subtree-sum			Medium
509	inorder-successor-in-bst-ii	🔒	📝	Medium
510	count-subarrays-with-more-ones-than-zeros	🔒		Medium
511	all-paths-from-source-lead-to-destination	🔒	📝	Medium
512	maximum-alternating-subarray-sum	🔒		Medium
513	find-bottom-left-tree-value			Medium
514	freedom-trail			Hard
515	find-largest-value-in-each-tree-row			Medium
516	longest-palindromic-subsequence			Medium
517	super-washing-machines		📝	Hard
518	coin-change-ii		📝	Medium
519	widest-pair-of-indices-with-equal-range-sum	🔒		Medium
520	detect-capital		📝	Easy
521	longest-uncommon-subsequence-i		📝	Easy
522	longest-uncommon-subsequence-ii		📝	Medium
523	continuous-subarray-sum		📝	Medium
524	longest-word-in-dictionary-through-deleting		📝	Medium
525	contiguous-array		📝	Medium
526	beautiful-arrangement		📝	Medium
527	word-abbreviation	🔒	📝	Hard
528	swapping-nodes-in-a-linked-list		📝	Medium
529	minesweeper			Medium
530	minimum-absolute-difference-in-bst			Easy
531	lonely-pixel-i	🔒	📝	Medium
532	k-diff-pairs-in-an-array		📝	Medium
533	lonely-pixel-ii	🔒		Medium
535	encode-and-decode-tinyurl		📝	Medium
536	construct-binary-tree-from-string	🔒	📝	Medium
537	complex-number-multiplication		📝	Medium
538	convert-bst-to-greater-tree		📝	Medium
539	minimum-time-difference			Medium
540	single-element-in-a-sorted-array		📝	Medium
541	reverse-string-ii		📝	Easy
542	01-matrix	Python3	📝	Medium
543	diameter-of-binary-tree	Cpp Python3	📝	Easy
544	output-contest-matches	🔒	📝	Medium
545	boundary-of-binary-tree	🔒	📝	Medium
546	remove-boxes		📝	Hard
547	number-of-provinces		📝	Medium
548	split-array-with-equal-sum	🔒	📝	Hard
549	binary-tree-longest-consecutive-sequence-ii	🔒	📝	Medium
550	shortest-path-to-get-food	🔒		Medium
551	student-attendance-record-i		📝	Easy
552	student-attendance-record-ii		📝	Hard
553	optimal-division		📝	Medium
554	brick-wall		📝	Medium
555	split-concatenated-strings	🔒	📝	Medium
556	next-greater-element-iii		📝	Medium
557	reverse-words-in-a-string-iii		📝	Easy
560	subarray-sum-equals-k		📝	Medium
561	array-partition		📝	Easy
562	longest-line-of-consecutive-one-in-matrix	🔒	📝	Medium
563	binary-tree-tilt		📝	Easy
564	find-the-closest-palindrome		📝	Hard
565	array-nesting		📝	Medium
566	reshape-the-matrix		📝	Easy
567	permutation-in-string		📝	Medium
568	maximum-vacation-days	🔒	📝	Hard
572	subtree-of-another-tree	Python3	📝	Easy
573	squirrel-simulation	🔒	📝	Medium
575	distribute-candies		📝	Easy
576	out-of-boundary-paths		📝	Medium
581	shortest-unsorted-continuous-subarray		📝	Medium
582	kill-process	🔒	📝	Medium
583	delete-operation-for-two-strings		📝	Medium
587	erect-the-fence		📝	Hard
588	design-in-memory-file-system	🔒	📝	Hard
591	tag-validator		📝	Hard
592	fraction-addition-and-subtraction		📝	Medium
593	valid-square		📝	Medium
594	longest-harmonious-subsequence		📝	Easy
598	range-addition-ii		📝	Easy
599	minimum-index-sum-of-two-lists		📝	Easy
600	non-negative-integers-without-consecutive-ones		📝	Hard
604	design-compressed-string-iterator	🔒	📝	Easy
605	can-place-flowers	Cpp	📝	Easy
606	construct-string-from-binary-tree	Cpp	📝	Easy
609	find-duplicate-file-in-system	Cpp	📝	Medium
611	valid-triangle-number		📝	Medium
616	add-bold-tag-in-string	🔒	📝	Medium
617	merge-two-binary-trees		📝	Easy
621	task-scheduler		📝	Medium
623	add-one-row-to-tree		📝	Medium
624	maximum-distance-in-arrays	🔒	📝	Medium
625	minimum-factorization	🔒	📝	Medium
628	maximum-product-of-three-numbers		📝	Easy
629	k-inverse-pairs-array		📝	Hard
630	course-schedule-iii		📝	Hard
631	design-excel-sum-formula	🔒	📝	Hard
632	smallest-range-covering-elements-from-k-lists		📝	Hard
633	sum-of-square-numbers		📝	Medium
634	find-the-derangement-of-an-array	🔒	📝	Medium
635	design-log-storage-system	🔒	📝	Medium
636	exclusive-time-of-functions		📝	Medium
637	average-of-levels-in-binary-tree		📝	Easy
638	shopping-offers		📝	Medium
639	decode-ways-ii		📝	Hard
640	solve-the-equation		📝	Medium
642	design-search-autocomplete-system	🔒	📝	Hard
643	maximum-average-subarray-i		📝	Easy
644	maximum-average-subarray-ii	🔒	📝	Hard
645	set-mismatch		📝	Easy
646	maximum-length-of-pair-chain		📝	Medium
647	palindromic-substrings		📝	Medium
648	replace-words		📝	Medium
649	dota2-senate		📝	Medium
650	2-keys-keyboard		📝	Medium
651	4-keys-keyboard	🔒	📝	Medium
652	find-duplicate-subtrees		📝	Medium
653	two-sum-iv-input-is-a-bst		📝	Easy
654	maximum-binary-tree		📝	Medium
655	print-binary-tree		📝	Medium
656	coin-path	🔒	📝	Hard
657	robot-return-to-origin		📝	Easy
658	find-k-closest-elements		📝	Medium
659	split-array-into-consecutive-subsequences		📝	Medium
660	remove-9	🔒	📝	Hard
661	image-smoother		📝	Easy
662	maximum-width-of-binary-tree		📝	Medium
663	equal-tree-partition	🔒	📝	Medium
664	strange-printer		📝	Hard
665	non-decreasing-array		📝	Medium
666	path-sum-iv	🔒	📝	Medium
667	beautiful-arrangement-ii		📝	Medium
668	kth-smallest-number-in-multiplication-table		📝	Hard
669	trim-a-binary-search-tree		📝	Medium
670	maximum-swap	Cpp	📝	Medium
671	second-minimum-node-in-a-binary-tree	Cpp	📝	Easy
672	bulb-switcher-ii		📝	Medium
673	number-of-longest-increasing-subsequence		📝	Medium
674	longest-continuous-increasing-subsequence		📝	Easy
675	cut-off-trees-for-golf-event		📝	Hard
676	implement-magic-dictionary		📝	Medium
677	map-sum-pairs		📝	Medium
678	valid-parenthesis-string		📝	Medium
679	24-game		📝	Hard
680	valid-palindrome-ii		📝	Easy
681	next-closest-time	🔒	📝	Medium
682	baseball-game		📝	Easy
683	k-empty-slots	🔒	📝	Hard
684	redundant-connection		📝	Medium
685	redundant-connection-ii		📝	Hard
686	repeated-string-match		📝	Medium
687	longest-univalue-path		📝	Medium
688	knight-probability-in-chessboard		📝	Medium
689	maximum-sum-of-3-non-overlapping-subarrays		📝	Hard
690	employee-importance		📝	Medium
691	stickers-to-spell-word		📝	Hard
692	top-k-frequent-words		📝	Medium
693	binary-number-with-alternating-bits		📝	Easy
694	number-of-distinct-islands	🔒	📝	Medium
695	max-area-of-island		📝	Medium
696	count-binary-substrings	Python3	📝	Easy
697	degree-of-an-array		📝	Easy
698	partition-to-k-equal-sum-subsets	Cpp	📝	Medium
699	falling-squares		📝	Hard
711	number-of-distinct-islands-ii	🔒	📝	Hard
712	minimum-ascii-delete-sum-for-two-strings		📝	Medium
713	subarray-product-less-than-k		📝	Medium
714	best-time-to-buy-and-sell-stock-with-transaction-fee		📝	Medium
715	range-module		📝	Hard
716	max-stack	🔒	📝	Hard
717	1-bit-and-2-bit-characters		📝	Easy
718	maximum-length-of-repeated-subarray		📝	Medium
719	find-k-th-smallest-pair-distance		📝	Hard
720	longest-word-in-dictionary		📝	Medium
721	accounts-merge		📝	Medium
722	remove-comments		📝	Medium
723	candy-crush	🔒	📝	Medium
724	find-pivot-index		📝	Easy
725	split-linked-list-in-parts		📝	Medium
726	number-of-atoms		📝	Hard
727	minimum-window-subsequence	🔒	📝	Hard
728	self-dividing-numbers		📝	Easy
729	my-calendar-i		📝	Medium
730	count-different-palindromic-subsequences		📝	Hard
731	my-calendar-ii		📝	Medium
732	my-calendar-iii		📝	Hard
733	flood-fill	Python3	📝	Easy
734	sentence-similarity	🔒	📝	Easy
735	asteroid-collision		📝	Medium
736	parse-lisp-expression		📝	Hard
737	sentence-similarity-ii	🔒	📝	Medium
738	monotone-increasing-digits		📝	Medium
739	daily-temperatures		📝	Medium
740	delete-and-earn		📝	Medium
741	cherry-pickup		📝	Hard
742	to-lower-case		📝	Easy
743	closest-leaf-in-a-binary-tree	🔒	📝	Medium
744	network-delay-time		📝	Medium
745	find-smallest-letter-greater-than-target	Cpp	📝	Easy
746	prefix-and-suffix-search		📝	Hard
747	min-cost-climbing-stairs		📝	Easy
748	largest-number-at-least-twice-of-others		📝	Easy
749	shortest-completing-word		📝	Easy
750	contain-virus		📝	Hard
751	number-of-corner-rectangles	🔒	📝	Medium
752	ip-to-cidr	🔒	📝	Medium
753	open-the-lock		📝	Medium
754	cracking-the-safe		📝	Hard
755	reach-a-number		📝	Medium
756	pour-water	🔒	📝	Medium
757	pyramid-transition-matrix		📝	Medium
758	convert-binary-search-tree-to-sorted-doubly-linked-list	🔒	📝	Medium
759	set-intersection-size-at-least-two		📝	Hard
760	bold-words-in-string	🔒	📝	Medium
761	employee-free-time		📝	Hard
762	find-anagram-mappings	🔒	📝	Easy
763	special-binary-string		📝	Hard
764	n-ary-tree-level-order-traversal		📝	Medium
765	serialize-and-deserialize-n-ary-tree	🔒	📝	Hard
766	flatten-a-multilevel-doubly-linked-list		📝	Medium
767	prime-number-of-set-bits-in-binary-representation		📝	Easy
768	partition-labels		📝	Medium
769	largest-plus-sign		📝	Medium
770	couples-holding-hands		📝	Hard
771	encode-n-ary-tree-to-binary-tree	🔒	📝	Hard
772	construct-quad-tree			Medium
773	logical-or-of-two-binary-grids-represented-as-quad-trees			Medium
774	maximum-depth-of-n-ary-tree		📝	Easy
775	n-ary-tree-preorder-traversal		📝	Easy
776	n-ary-tree-postorder-traversal		📝	Easy
777	toeplitz-matrix		📝	Easy
778	reorganize-string		📝	Medium
779	max-chunks-to-make-sorted-ii		📝	Hard
780	max-chunks-to-make-sorted		📝	Medium
781	basic-calculator-iv		📝	Hard
782	jewels-and-stones		📝	Easy
783	search-in-a-binary-search-tree		📝	Easy
784	insert-into-a-binary-search-tree		📝	Medium
785	basic-calculator-iii	🔒		Hard
786	search-in-a-sorted-array-of-unknown-size	🔒	📝	Medium
787	sliding-puzzle		📝	Hard
788	minimize-max-distance-to-gas-station	🔒	📝	Hard
789	kth-largest-element-in-a-stream		📝	Easy
790	global-and-local-inversions		📝	Medium
791	split-bst	🔒	📝	Medium
792	binary-search		📝	Easy
793	swap-adjacent-in-lr-string		📝	Medium
794	swim-in-rising-water		📝	Hard
795	k-th-symbol-in-grammar		📝	Medium
796	reaching-points		📝	Hard
797	rabbits-in-forest		📝	Medium
798	transform-to-chessboard		📝	Hard
799	minimum-distance-between-bst-nodes		📝	Easy
800	letter-case-permutation		📝	Medium
801	is-graph-bipartite		📝	Medium
802	k-th-smallest-prime-fraction	Cpp	📝	Medium
803	cheapest-flights-within-k-stops		📝	Medium
804	rotated-digits		📝	Medium
805	escape-the-ghosts		📝	Medium
806	domino-and-tromino-tiling		📝	Medium
807	custom-sort-string		📝	Medium
808	number-of-matching-subsequences		📝	Medium
809	preimage-size-of-factorial-zeroes-function		📝	Hard
810	valid-tic-tac-toe-state		📝	Medium
811	number-of-subarrays-with-bounded-maximum		📝	Medium
812	rotate-string		📝	Easy
813	all-paths-from-source-to-target	Python3	📝	Medium
814	smallest-rotation-with-highest-score		📝	Hard
815	champagne-tower		📝	Medium
816	design-hashset		📝	Easy
817	design-hashmap		📝	Easy
818	similar-rgb-color	🔒	📝	Easy
819	minimum-swaps-to-make-sequences-increasing		📝	Hard
820	find-eventual-safe-states		📝	Medium
821	bricks-falling-when-hit		📝	Hard
822	unique-morse-code-words		📝	Easy
823	split-array-with-same-average		📝	Hard
824	number-of-lines-to-write-string		📝	Easy
825	max-increase-to-keep-city-skyline		📝	Medium
826	soup-servings		📝	Medium
827	expressive-words		📝	Medium
828	chalkboard-xor-game		📝	Hard
829	subdomain-visit-count		📝	Medium
830	largest-triangle-area		📝	Easy
831	largest-sum-of-averages		📝	Medium
832	binary-tree-pruning		📝	Medium
833	bus-routes		📝	Hard
834	ambiguous-coordinates		📝	Medium
835	linked-list-components		📝	Medium
836	race-car		📝	Hard
837	most-common-word		📝	Easy
838	design-linked-list		📝	Medium
839	short-encoding-of-words		📝	Medium
841	shortest-distance-to-a-character		📝	Easy
842	card-flipping-game		📝	Medium
843	binary-trees-with-factors		📝	Medium
850	insert-into-a-sorted-circular-linked-list	🔒	📝	Medium
851	goat-latin		📝	Easy
852	friends-of-appropriate-ages		📝	Medium
853	most-profit-assigning-work		📝	Medium
854	making-a-large-island		📝	Hard
855	count-unique-characters-of-all-substrings-of-a-given-string		📝	Hard
856	consecutive-numbers-sum		📝	Hard
857	positions-of-large-groups		📝	Easy
858	masking-personal-information		📝	Medium
859	design-circular-deque			Medium
860	design-circular-queue		📝	Medium
861	flipping-an-image		📝	Easy
862	find-and-replace-in-string		📝	Medium
863	sum-of-distances-in-tree		📝	Hard
864	image-overlap		📝	Medium
865	robot-room-cleaner	🔒	📝	Hard
866	rectangle-overlap		📝	Easy
867	new-21-game		📝	Medium
868	push-dominoes		📝	Medium
869	similar-string-groups		📝	Hard
870	magic-squares-in-grid		📝	Medium
871	keys-and-rooms		📝	Medium
872	split-array-into-fibonacci-sequence		📝	Medium
873	guess-the-word			Hard
874	backspace-string-compare	Python3	📝	Easy
875	longest-mountain-in-array		📝	Medium
876	hand-of-straights		📝	Medium
877	shortest-path-visiting-all-nodes		📝	Hard
878	shifting-letters		📝	Medium
879	maximize-distance-to-closest-person		📝	Medium
880	rectangle-area-ii		📝	Hard
881	loud-and-rich		📝	Medium
882	peak-index-in-a-mountain-array		📝	Medium
883	car-fleet		📝	Medium
884	k-similar-strings		📝	Hard
885	exam-room		📝	Medium
886	score-of-parentheses		📝	Medium
887	minimum-cost-to-hire-k-workers		📝	Hard
888	mirror-reflection		📝	Medium
889	buddy-strings		📝	Easy
890	lemonade-change		📝	Easy
891	score-after-flipping-matrix		📝	Medium
892	shortest-subarray-with-sum-at-least-k		📝	Hard
893	all-nodes-distance-k-in-binary-tree		📝	Medium
894	random-pick-with-blacklist		📝	Hard
895	shortest-path-to-get-all-keys		📝	Hard
896	smallest-subtree-with-all-the-deepest-nodes		📝	Medium
897	prime-palindrome		📝	Medium
898	transpose-matrix		📝	Easy
899	binary-gap		📝	Easy
900	reordered-power-of-2		📝	Medium
901	advantage-shuffle		📝	Medium
902	minimum-number-of-refueling-stops		📝	Hard
903	implement-rand10-using-rand7		📝	Medium
904	leaf-similar-trees		📝	Easy
905	length-of-longest-fibonacci-subsequence		📝	Medium
906	walking-robot-simulation		📝	Medium
907	koko-eating-bananas		📝	Medium
908	middle-of-the-linked-list	Python3	📝	Easy
909	stone-game		📝	Medium
910	nth-magical-number		📝	Hard
911	profitable-schemes		📝	Hard
912	random-pick-with-weight		📝	Medium
913	random-flip-matrix		📝	Medium
914	random-point-in-non-overlapping-rectangles		📝	Medium
915	generate-random-point-in-a-circle		📝	Medium
916	decoded-string-at-index		📝	Medium
917	boats-to-save-people		📝	Medium
918	reachable-nodes-in-subdivided-graph		📝	Hard
919	projection-area-of-3d-shapes		📝	Easy
920	uncommon-words-from-two-sentences		📝	Easy
921	spiral-matrix-iii		📝	Medium
922	possible-bipartition		📝	Medium
923	super-egg-drop		📝	Hard
924	fair-candy-swap		📝	Easy
925	construct-binary-tree-from-preorder-and-postorder-traversal		📝	Medium
926	find-and-replace-pattern		📝	Medium
927	sum-of-subsequence-widths		📝	Hard
928	surface-area-of-3d-shapes		📝	Easy
929	groups-of-special-equivalent-strings		📝	Medium
930	all-possible-full-binary-trees		📝	Medium
931	maximum-frequency-stack		📝	Hard
932	monotonic-array		📝	Easy
933	increasing-order-search-tree		📝	Easy
934	bitwise-ors-of-subarrays		📝	Medium
935	orderly-queue		📝	Hard
936	rle-iterator		📝	Medium
937	online-stock-span		📝	Medium
938	numbers-at-most-n-given-digit-set		📝	Hard
939	valid-permutations-for-di-sequence		📝	Hard
940	fruit-into-baskets		📝	Medium
941	sort-array-by-parity		📝	Easy
942	super-palindromes		📝	Hard
943	sum-of-subarray-minimums		📝	Medium
944	smallest-range-i		📝	Easy
945	snakes-and-ladders		📝	Medium
946	smallest-range-ii		📝	Medium
947	online-election		📝	Medium
948	sort-an-array			Medium
949	cat-and-mouse		📝	Hard
950	x-of-a-kind-in-a-deck-of-cards		📝	Easy
951	partition-array-into-disjoint-intervals		📝	Medium
952	word-subsets		📝	Medium
953	reverse-only-letters		📝	Easy
954	maximum-sum-circular-subarray		📝	Medium
955	complete-binary-tree-inserter		📝	Medium
956	number-of-music-playlists		📝	Hard
957	minimum-add-to-make-parentheses-valid		📝	Medium
958	sort-array-by-parity-ii		📝	Easy
959	3sum-with-multiplicity		📝	Medium
960	minimize-malware-spread		📝	Hard
961	long-pressed-name		📝	Easy
962	flip-string-to-monotone-increasing		📝	Medium
963	three-equal-parts		📝	Hard
964	minimize-malware-spread-ii		📝	Hard
965	unique-email-addresses		📝	Easy
966	binary-subarrays-with-sum		📝	Medium
967	minimum-falling-path-sum		📝	Medium
968	beautiful-array		📝	Medium
969	number-of-recent-calls		📝	Easy
971	shortest-bridge		📝	Medium
972	knight-dialer		📝	Medium
973	stamping-the-sequence		📝	Hard
974	reorder-data-in-log-files		📝	Medium
975	range-sum-of-bst		📝	Easy
976	minimum-area-rectangle		📝	Medium
977	distinct-subsequences-ii		📝	Hard
978	valid-mountain-array		📝	Easy
979	di-string-match		📝	Easy
980	find-the-shortest-superstring		📝	Hard
981	delete-columns-to-make-sorted		📝	Easy
982	minimum-increment-to-make-array-unique		📝	Medium
983	validate-stack-sequences	Cpp	📝	Medium
984	most-stones-removed-with-same-row-or-column		📝	Medium
985	bag-of-tokens		📝	Medium
986	largest-time-for-given-digits		📝	Medium
987	reveal-cards-in-increasing-order		📝	Medium
988	flip-equivalent-binary-trees	Cpp	📝	Medium
989	largest-component-size-by-common-factor		📝	Hard
990	verifying-an-alien-dictionary		📝	Easy
991	array-of-doubled-pairs	Cpp	📝	Medium
992	delete-columns-to-make-sorted-ii	Cpp	📝	Medium
993	tallest-billboard		📝	Hard
994	prison-cells-after-n-days	Cpp	📝	Medium
998	check-completeness-of-a-binary-tree	Cpp	📝	Medium
999	regions-cut-by-slashes	Cpp	📝	Medium
1000	delete-columns-to-make-sorted-iii		📝	Hard
1001	n-repeated-element-in-size-2n-array		📝	Easy
1002	maximum-width-ramp		📝	Medium
1003	minimum-area-rectangle-ii		📝	Medium
1004	least-operators-to-express-number		📝	Hard
1005	univalued-binary-tree		📝	Easy
1006	vowel-spellchecker		📝	Medium
1007	numbers-with-same-consecutive-differences		📝	Medium
1008	binary-tree-cameras		📝	Hard
1009	pancake-sorting		📝	Medium
1010	powerful-integers		📝	Medium
1011	flip-binary-tree-to-match-preorder-traversal		📝	Medium
1012	equal-rational-numbers		📝	Hard
1013	fibonacci-number		📝	Easy
1014	k-closest-points-to-origin	Python3	📝	Medium
1016	subarray-sums-divisible-by-k		📝	Medium
1017	odd-even-jump		📝	Hard
1018	largest-perimeter-triangle		📝	Easy
1019	squares-of-a-sorted-array	Python3	📝	Easy
1020	longest-turbulent-subarray		📝	Medium
1021	distribute-coins-in-binary-tree		📝	Medium
1022	unique-paths-iii		📝	Hard
1023	time-based-key-value-store		📝	Medium
1024	triples-with-bitwise-and-equal-to-zero			Hard
1025	minimum-cost-for-tickets		📝	Medium
1026	string-without-aaa-or-bbb		📝	Medium
1027	sum-of-even-numbers-after-queries		📝	Medium
1028	interval-list-intersections		📝	Medium
1029	vertical-order-traversal-of-a-binary-tree		📝	Hard
1030	smallest-string-starting-from-leaf		📝	Medium
1031	add-to-array-form-of-integer		📝	Easy
1032	satisfiability-of-equality-equations		📝	Medium
1033	broken-calculator		📝	Medium
1034	subarrays-with-k-different-integers		📝	Hard
1035	cousins-in-binary-tree		📝	Easy
1036	rotting-oranges		📝	Medium
1037	minimum-number-of-k-consecutive-bit-flips		📝	Hard
1038	number-of-squareful-arrays		📝	Hard
1039	find-the-town-judge		📝	Easy
1040	maximum-binary-tree-ii			Medium
1041	available-captures-for-rook			Easy
1042	minimum-cost-to-merge-stones			Hard
1043	grid-illumination			Hard
1044	find-common-characters			Easy
1045	check-if-word-is-valid-after-substitutions			Medium
1046	max-consecutive-ones-iii	Python3	📝	Medium
1047	maximize-sum-of-array-after-k-negations			Easy
1048	clumsy-factorial			Medium
1049	minimum-domino-rotations-for-equal-row		📝	Medium
1050	construct-binary-search-tree-from-preorder-traversal		📝	Medium
1051	shortest-way-to-form-string	🔒		Medium
1052	campus-bikes	🔒	📝	Medium
1053	minimize-rounding-error-to-meet-target	🔒		Medium
1054	complement-of-base-10-integer		📝	Easy
1055	pairs-of-songs-with-total-durations-divisible-by-60		📝	Medium
1056	capacity-to-ship-packages-within-d-days			Medium
1057	numbers-with-repeated-digits			Hard
1058	lexicographically-smallest-equivalent-string	🔒		Medium
1059	missing-element-in-sorted-array	🔒	📝	Medium
1060	longest-repeating-substring	🔒	📝	Medium
1061	number-of-valid-subarrays	🔒		Hard
1062	partition-array-into-three-parts-with-equal-sum			Easy
1063	best-sightseeing-pair			Medium
1064	smallest-integer-divisible-by-k		📝	Medium
1065	binary-string-with-substrings-representing-1-to-n			Medium
1066	fixed-point	🔒	📝	Easy
1067	campus-bikes-ii	🔒	📝	Medium
1068	digit-count-in-range	🔒		Hard
1069	confusing-number	🔒		Easy
1070	convert-to-base-2			Medium
1071	binary-prefix-divisible-by-5			Easy
1072	next-greater-node-in-linked-list		📝	Medium
1073	number-of-enclaves			Medium
1074	high-five	🔒	📝	Easy
1075	index-pairs-of-a-string	🔒		Easy
1076	brace-expansion	🔒	📝	Medium
1077	confusing-number-ii	🔒		Hard
1078	remove-outermost-parentheses			Easy
1079	sum-of-root-to-leaf-binary-numbers		📝	Easy
1080	camelcase-matching			Medium
1081	video-stitching			Medium
1082	sum-of-digits-in-the-minimum-number	🔒		Easy
1083	two-sum-less-than-k	🔒	📝	Easy
1084	find-k-length-substrings-with-no-repeated-characters	🔒	📝	Medium
1085	the-earliest-moment-when-everyone-become-friends	🔒	📝	Medium
1086	divisor-game			Easy
1087	longest-arithmetic-subsequence			Medium
1088	number-of-days-in-a-month	🔒		Easy
1089	remove-vowels-from-a-string	🔒		Easy
1090	armstrong-number	🔒	📝	Easy
1091	maximum-average-subtree	🔒	📝	Medium
1092	maximum-difference-between-node-and-ancestor		📝	Medium
1093	recover-a-tree-from-preorder-traversal			Hard
1094	matrix-cells-in-distance-order			Easy
1095	two-city-scheduling		📝	Medium
1096	maximum-sum-of-two-non-overlapping-subarrays			Medium
1097	stream-of-characters		📝	Hard
1098	largest-unique-number	🔒	📝	Easy
1099	path-with-maximum-minimum-value	🔒	📝	Medium
1100	connecting-cities-with-minimum-cost	🔒	📝	Medium
1101	parallel-courses	🔒	📝	Medium
1102	check-if-a-number-is-majority-element-in-a-sorted-array	🔒		Easy
1103	moving-stones-until-consecutive			Medium
1104	coloring-a-border			Medium
1105	uncrossed-lines			Medium
1106	escape-a-large-maze			Hard
1107	minimum-swaps-to-group-all-1s-together	🔒	📝	Medium
1108	analyze-user-website-visit-pattern	🔒		Medium
1111	minimum-score-triangulation-of-polygon			Medium
1112	find-words-that-can-be-formed-by-characters			Easy
1113	moving-stones-until-consecutive-ii			Medium
1114	binary-search-tree-to-greater-sum-tree			Medium
1115	valid-boomerang			Easy
1116	maximum-level-sum-of-a-binary-tree		📝	Medium
1117	as-far-from-land-as-possible			Medium
1118	divide-array-into-increasing-sequences	🔒		Hard
1119	robot-bounded-in-circle		📝	Medium
1120	flower-planting-with-no-adjacent			Medium
1121	partition-array-for-maximum-sum			Medium
1122	longest-duplicate-substring		📝	Hard
1123	single-row-keyboard	🔒	📝	Easy
1124	string-transforms-into-another-string	🔒	📝	Hard
1125	design-file-system	🔒	📝	Medium
1126	minimum-cost-to-connect-sticks	🔒	📝	Medium
1127	last-stone-weight		📝	Easy
1128	remove-all-adjacent-duplicates-in-string		📝	Easy
1129	longest-string-chain		📝	Medium
1130	last-stone-weight-ii			Medium
1131	count-substrings-with-only-one-distinct-letter	🔒	📝	Easy
1132	before-and-after-puzzle	🔒		Medium
1133	last-substring-in-lexicographical-order			Hard
1134	shortest-distance-to-target-color	🔒	📝	Medium
1137	height-checker			Easy
1138	grumpy-bookstore-owner			Medium
1139	previous-permutation-with-one-swap			Medium
1140	distant-barcodes			Medium
1141	how-many-apples-can-you-put-into-the-basket	🔒	📝	Easy
1142	minimum-knight-moves	🔒	📝	Medium
1143	find-smallest-common-element-in-all-rows	🔒	📝	Medium
1144	optimize-water-distribution-in-a-village	🔒	📝	Hard
1145	number-of-submatrices-that-sum-to-target		📝	Hard
1146	greatest-common-divisor-of-strings			Easy
1147	flip-columns-for-maximum-number-of-equal-rows			Medium
1148	adding-two-negabinary-numbers			Medium
1149	intersection-of-three-sorted-arrays	🔒	📝	Easy
1150	two-sum-bsts	🔒	📝	Medium
1151	stepping-numbers	🔒		Medium
1152	maximum-number-of-ones	🔒		Hard
1156	occurrences-after-bigram			Easy
1157	insufficient-nodes-in-root-to-leaf-paths			Medium
1159	smallest-subsequence-of-distinct-characters			Medium
1160	letter-tile-possibilities			Medium
1164	missing-number-in-arithmetic-progression	🔒	📝	Easy
1165	meeting-scheduler	🔒	📝	Medium
1166	toss-strange-coins	🔒		Medium
1167	minimum-time-to-build-blocks	🔒		Hard
1168	duplicate-zeros		📝	Easy
1169	largest-values-from-labels			Medium
1170	shortest-common-supersequence			Hard
1171	shortest-path-in-binary-matrix		📝	Medium
1175	array-transformation	🔒		Easy
1176	design-a-leaderboard	🔒	📝	Medium
1177	tree-diameter	🔒	📝	Medium
1178	valid-palindrome-iii	🔒	📝	Hard
1183	statistics-from-a-large-sample			Medium
1184	car-pooling		📝	Medium
1185	find-in-mountain-array			Hard
1188	brace-expansion-ii			Hard
1189	encode-number	🔒		Medium
1190	smallest-common-region	🔒		Medium
1191	synonymous-sentences	🔒		Medium
1192	divide-chocolate	🔒	📝	Hard
1194	path-in-zigzag-labelled-binary-tree			Medium
1195	distribute-candies-to-people		📝	Easy
1196	filling-bookcase-shelves			Medium
1197	parsing-a-boolean-expression			Hard
1199	hexspeak	🔒		Easy
1200	remove-interval	🔒	📝	Medium
1201	delete-tree-nodes	🔒		Medium
1202	palindrome-removal	🔒		Hard
1205	defanging-an-ip-address			Easy
1206	corporate-flight-bookings			Medium
1207	delete-nodes-and-return-forest			Medium
1208	maximum-nesting-depth-of-two-valid-parentheses-strings			Medium
1210	mean-of-array-after-removing-some-elements			Easy
1211	iterator-for-combination		📝	Medium
1212	sequential-digits		📝	Medium
1213	handshakes-that-dont-cross	🔒		Hard
1217	relative-sort-array			Easy
1218	lowest-common-ancestor-of-deepest-leaves			Medium
1219	longest-well-performing-interval			Medium
1220	smallest-sufficient-team			Hard
1221	element-appearing-more-than-25-in-sorted-array			Easy
1222	remove-covered-intervals		📝	Medium
1223	graph-connectivity-with-threshold			Hard
1224	minimum-falling-path-sum-ii			Hard
1227	number-of-equivalent-domino-pairs			Easy
1228	minimum-cost-tree-from-leaf-values			Medium
1229	shortest-path-with-alternating-colors			Medium
1230	maximum-of-absolute-value-expression			Medium
1231	replace-elements-with-greatest-element-on-right-side			Easy
1232	sum-of-mutated-array-closest-to-target			Medium
1233	number-of-ships-in-a-rectangle	🔒	📝	Hard
1234	number-of-paths-with-max-score			Hard
1236	n-th-tribonacci-number		📝	Easy
1238	alphabet-board-path			Medium
1239	largest-1-bordered-square			Medium
1240	stone-game-ii			Medium
1241	decompress-run-length-encoded-list			Easy
1242	matrix-block-sum			Medium
1243	sum-of-nodes-with-even-valued-grandparent			Medium
1244	distinct-echo-substrings			Hard
1247	decrease-elements-to-make-array-zigzag			Medium
1248	binary-tree-coloring-game			Medium
1249	snapshot-array			Medium
1250	longest-common-subsequence		📝	Medium
1251	longest-chunked-palindrome-decomposition			Hard
1252	break-a-palindrome		📝	Medium
1253	sort-the-matrix-diagonally		📝	Medium
1254	deepest-leaves-sum		📝	Medium
1255	reverse-subarray-to-maximize-array-value			Hard
1256	rank-transform-of-an-array			Easy
1257	rank-transform-of-a-matrix		📝	Hard
1260	day-of-the-year			Easy
1261	swap-for-longest-repeated-character-substring			Medium
1262	online-majority-element-in-subarray			Hard
1263	number-of-dice-rolls-with-target-sum		📝	Medium
1264	maximum-number-of-words-you-can-type			Easy
1267	remove-zero-sum-consecutive-nodes-from-linked-list			Medium
1270	dinner-plate-stacks			Hard
1271	web-crawler	🔒		Medium
1272	invalid-transactions			Medium
1273	compare-strings-by-frequency-of-the-smallest-character			Medium
1274	number-of-days-between-two-dates			Easy
1275	validate-binary-tree-nodes			Medium
1276	closest-divisors			Medium
1277	largest-multiple-of-three			Hard
1279	prime-arrangements			Easy
1280	diet-plan-performance	🔒		Easy
1281	can-make-palindrome-from-substring			Medium
1282	number-of-valid-words-for-each-puzzle		📝	Hard
1283	reformat-date			Easy
1284	four-divisors			Medium
1285	balance-a-binary-search-tree			Medium
1286	constrained-subsequence-sum			Hard
1287	distance-between-bus-stops			Easy
1288	maximum-subarray-sum-with-one-deletion			Medium
1289	day-of-the-week			Easy
1290	make-array-strictly-increasing			Hard
1293	three-consecutive-odds			Easy
1294	range-frequency-queries			Medium
1295	minimum-garden-perimeter-to-collect-enough-apples			Medium
1296	kth-ancestor-of-a-tree-node			Hard
1297	maximum-number-of-balloons		📝	Easy
1298	reverse-substrings-between-each-pair-of-parentheses			Medium
1299	k-concatenation-maximum-sum			Medium
1300	critical-connections-in-a-network		📝	Hard
1302	delete-characters-to-make-fancy-string			Easy
1303	minimum-moves-to-reach-target-score			Medium
1304	longest-happy-string			Medium
1305	number-of-visible-people-in-a-queue			Hard
1306	minimum-absolute-difference		📝	Easy
1307	ugly-number-iii			Medium
1308	smallest-string-with-swaps		📝	Medium
1309	sort-items-by-groups-respecting-dependencies			Hard
1310	watering-plants			Medium
1311	largest-magic-square			Medium
1312	count-artifacts-that-can-be-extracted			Medium
1313	count-ways-to-build-rooms-in-an-ant-colony			Hard
1319	unique-number-of-occurrences		📝	Easy
1320	remove-all-adjacent-duplicates-in-string-ii		📝	Medium
1321	get-equal-substrings-within-budget			Medium
1322	minimum-moves-to-reach-target-with-rotations			Hard
1324	where-will-the-ball-fall		📝	Medium
1325	path-with-maximum-probability			Medium
1326	sum-of-floored-pairs			Hard
1329	minimum-cost-to-move-chips-to-the-same-position		📝	Easy
1330	longest-arithmetic-subsequence-of-given-difference			Medium
1331	path-with-maximum-gold			Medium
1332	count-vowels-permutation		📝	Hard
1333	sort-the-jumbled-numbers			Medium
1334	sum-of-numbers-with-units-digit-k			Medium
1335	maximum-candies-allocated-to-k-children			Medium
1336	maximum-product-of-the-length-of-two-palindromic-substrings			Hard
1337	design-skiplist			Hard
1341	split-a-string-in-balanced-strings			Easy
1342	queens-that-can-attack-the-king			Medium
1343	dice-roll-simulation			Hard
1344	maximum-equal-frequency			Hard
1345	perform-string-shifts	🔒	📝	Easy
1346	maximize-the-topmost-element-after-k-moves			Medium
1347	distance-to-a-cycle-in-undirected-graph	🔒		Hard
1348	maximum-score-of-spliced-array			Hard
1349	check-if-it-is-a-straight-line			Easy
1350	remove-sub-folders-from-the-filesystem			Medium
1351	replace-the-substring-for-balanced-string			Medium
1352	maximum-profit-in-job-scheduling		📝	Hard
1353	find-resultant-array-after-removing-anagrams			Easy
1354	find-players-with-zero-or-one-losses		📝	Medium
1355	minimum-deletions-to-make-array-beautiful			Medium
1356	minimum-number-of-moves-to-make-palindrome			Hard
1358	find-positive-integer-solution-for-a-given-equation			Medium
1359	circular-permutation-in-binary-representation			Medium
1360	maximum-length-of-a-concatenated-string-with-unique-characters		📝	Medium
1361	tiling-a-rectangle-with-the-fewest-squares			Hard
1362	airplane-seat-assignment-probability			Medium
1363	greatest-english-letter-in-upper-and-lower-case			Easy
1364	tuple-with-same-product			Medium
1366	first-unique-number	🔒	📝	Medium
1367	maximum-height-by-stacking-cuboids			Hard
1369	minimum-swaps-to-make-strings-equal			Medium
1370	count-number-of-nice-subarrays			Medium
1371	minimum-remove-to-make-valid-parentheses		📝	Medium
1372	check-if-it-is-a-good-array			Hard
1374	leftmost-column-with-at-least-a-one	🔒	📝	Medium
1375	find-palindrome-with-fixed-length			Medium
1376	selling-pieces-of-wood			Hard
1378	cells-with-odd-values-in-a-matrix			Easy
1379	reconstruct-a-2-row-binary-matrix			Medium
1380	number-of-closed-islands			Medium
1381	maximum-score-words-formed-by-letters			Hard
1382	calculate-amount-paid-in-taxes			Easy
1383	number-of-single-divisor-triplets	🔒		Medium
1384	maximum-font-to-fit-a-sentence-in-a-screen	🔒		Medium
1385	number-of-ways-to-build-house-of-cards	🔒		Medium
1386	shift-2d-grid		📝	Easy
1387	find-elements-in-a-contaminated-binary-tree			Medium
1388	greatest-sum-divisible-by-three			Medium
1389	minimum-moves-to-move-a-box-to-their-target-location			Hard
1391	counting-elements	🔒	📝	Easy
1392	find-the-difference-of-two-arrays			Easy
1393	maximum-value-of-k-coins-from-piles			Hard
1394	minimum-path-cost-in-a-grid			Medium
1395	minimum-time-visiting-all-points			Easy
1396	count-servers-that-communicate			Medium
1397	search-suggestions-system		📝	Medium
1398	number-of-ways-to-stay-in-the-same-place-after-some-steps			Hard
1400	find-winner-on-a-tic-tac-toe-game		📝	Easy
1401	number-of-burgers-with-no-waste-of-ingredients			Medium
1402	count-square-submatrices-with-all-ones			Medium
1403	palindrome-partitioning-iii			Hard
1404	print-immutable-linked-list-in-reverse	🔒		Medium
1406	subtract-the-product-and-sum-of-digits-of-an-integer			Easy
1407	group-the-people-given-the-group-size-they-belong-to			Medium
1408	find-the-smallest-divisor-given-a-threshold		📝	Medium
1409	minimum-number-of-flips-to-convert-binary-matrix-to-zero-matrix			Hard
1411	convert-binary-number-in-a-linked-list-to-integer		📝	Easy
1413	maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold			Medium
1414	shortest-path-in-a-grid-with-obstacles-elimination		📝	Hard
1416	check-if-an-array-is-consecutive	🔒		Easy
1418	fair-distribution-of-cookies			Medium
1419	make-array-non-decreasing-or-non-increasing	🔒		Hard
1421	find-numbers-with-even-number-of-digits			Easy
1422	divide-array-in-sets-of-k-consecutive-numbers			Medium
1423	maximum-number-of-occurrences-of-a-substring			Medium
1424	maximum-candies-you-can-get-from-boxes			Hard
1426	find-n-unique-integers-sum-up-to-zero			Easy
1427	all-elements-in-two-binary-search-trees		📝	Medium
1428	jump-game-iii		📝	Medium
1429	verbal-arithmetic-puzzle			Hard
1430	find-the-k-beauty-of-a-number			Easy
1431	all-ancestors-of-a-node-in-a-directed-acyclic-graph			Medium
1432	check-if-a-string-is-a-valid-sequence-from-root-to-leaves-path-in-a-binary-tree	🔒		Medium
1433	encrypt-and-decrypt-strings			Hard
1434	decrypt-string-from-alphabet-to-integer-mapping			Easy
1435	xor-queries-of-a-subarray			Medium
1436	get-watched-videos-by-your-friends			Medium
1437	minimum-insertion-steps-to-make-a-string-palindrome			Hard
1440	convert-integer-to-the-sum-of-two-no-zero-integers			Easy
1441	minimum-flips-to-make-a-or-b-equal-to-c			Medium
1442	number-of-operations-to-make-network-connected			Medium
1443	minimum-distance-to-type-a-word-using-two-fingers			Hard
1444	number-of-steps-to-reduce-a-number-to-zero		📝	Easy
1445	number-of-sub-arrays-of-size-k-and-average-greater-than-or-equal-to-threshold			Medium
1446	angle-between-hands-of-a-clock		📝	Medium
1447	jump-game-iv		📝	Hard
1448	maximum-69-number		📝	Easy
1449	print-words-vertically			Medium
1450	delete-leaves-with-a-given-value			Medium
1451	minimum-number-of-taps-to-open-to-water-a-garden			Hard
1454	remove-palindromic-subsequences		📝	Easy
1455	filter-restaurants-by-vegan-friendly-price-and-distance			Medium
1456	find-the-city-with-the-smallest-number-of-neighbors-at-a-threshold-distance			Medium
1457	minimum-difficulty-of-a-job-schedule		📝	Hard
1458	sort-integers-by-the-number-of-1-bits			Easy
1459	apply-discount-every-n-orders			Medium
1460	number-of-substrings-containing-all-three-characters			Medium
1461	count-all-valid-pickup-and-delivery-options		📝	Hard
1463	the-k-weakest-rows-in-a-matrix		📝	Easy
1464	reduce-array-size-to-the-half		📝	Medium
1465	maximum-product-of-splitted-binary-tree		📝	Medium
1466	jump-game-v			Hard
1468	check-if-n-and-its-double-exist			Easy
1469	minimum-number-of-steps-to-make-two-strings-anagram			Medium
1470	tweet-counts-per-frequency			Medium
1471	maximum-students-taking-exam			Hard
1472	increasing-decreasing-string			Easy
1473	find-the-longest-substring-containing-vowels-in-even-counts			Medium
1474	longest-zigzag-path-in-a-binary-tree			Medium
1475	maximum-sum-bst-in-binary-tree			Hard
1476	count-negative-numbers-in-a-sorted-matrix			Easy
1477	product-of-the-last-k-numbers			Medium
1478	maximum-number-of-events-that-can-be-attended	Python3		Medium
1479	construct-target-array-with-multiple-sums		📝	Hard
1482	how-many-numbers-are-smaller-than-the-current-number			Easy
1483	rank-teams-by-votes			Medium
1484	linked-list-in-binary-tree			Medium
1485	minimum-cost-to-make-at-least-one-valid-path-in-a-grid			Hard
1486	find-the-distance-value-between-two-arrays			Easy
1487	cinema-seat-allocation			Medium
1488	sort-integers-by-the-power-value			Medium
1489	pizza-with-3n-slices			Hard
1490	generate-a-string-with-characters-that-have-odd-counts			Easy
1491	number-of-times-binary-string-is-prefix-aligned			Medium
1492	time-needed-to-inform-all-employees			Medium
1493	frog-position-after-t-seconds			Hard
1496	lucky-numbers-in-a-matrix			Easy
1497	design-a-stack-with-increment-operation	Python3		Medium
1498	find-a-corresponding-node-of-a-binary-tree-in-a-clone-of-that-tree		📝	Easy
1499	maximum-performance-of-a-team		📝	Hard
1500	count-largest-group			Easy
1501	circle-and-rectangle-overlapping			Medium
1502	construct-k-palindrome-strings			Medium
1503	reducing-dishes			Hard
1505	create-target-array-in-the-given-order			Easy
1507	check-if-there-is-a-valid-path-in-a-grid			Medium
1508	longest-happy-prefix			Hard
1510	find-lucky-integer-in-an-array		📝	Easy
1511	count-number-of-teams			Medium
1512	design-underground-system		📝	Medium
1513	find-all-good-strings			Hard
1514	minimum-value-to-get-positive-step-by-step-sum		📝	Easy
1515	find-the-minimum-number-of-fibonacci-numbers-whose-sum-is-k			Medium
1516	the-k-th-lexicographical-string-of-all-happy-strings-of-length-n			Medium
1517	restore-the-array			Hard
1519	minimum-subsequence-in-non-increasing-order			Easy
1520	number-of-steps-to-reduce-a-number-in-binary-representation-to-one			Medium
1522	stone-game-iii			Hard
1524	string-matching-in-an-array			Easy
1525	queries-on-a-permutation-with-key			Medium
1526	html-entity-parser			Medium
1527	number-of-ways-to-paint-n-3-grid			Hard
1528	kids-with-the-greatest-number-of-candies			Easy
1529	max-difference-you-can-get-from-changing-an-integer			Medium
1530	check-if-a-string-can-break-another-string			Medium
1531	number-of-ways-to-wear-different-hats-to-each-other			Hard
1532	reformat-the-string			Easy
1533	display-table-of-food-orders-in-a-restaurant			Medium
1534	minimum-number-of-frogs-croaking			Medium
1535	build-array-where-you-can-find-the-maximum-exactly-k-comparisons			Hard
1537	maximum-score-after-splitting-a-string			Easy
1538	maximum-points-you-can-obtain-from-cards		📝	Medium
1539	diagonal-traverse-ii			Medium
1542	consecutive-characters		📝	Easy
1543	simplified-fractions			Medium
1544	count-good-nodes-in-binary-tree		📝	Medium
1545	form-largest-integer-with-digits-that-add-up-to-target			Hard
1547	destination-city			Easy
1548	check-if-all-1s-are-at-least-length-k-places-away		📝	Easy
1549	longest-continuous-subarray-with-absolute-diff-less-than-or-equal-to-limit			Medium
1550	find-the-kth-smallest-sum-of-a-matrix-with-sorted-rows			Hard
1552	build-an-array-with-stack-operations			Medium
1553	count-triplets-that-can-form-two-arrays-of-equal-xor			Medium
1554	minimum-time-to-collect-all-apples-in-a-tree			Medium
1555	number-of-ways-of-cutting-a-pizza			Hard
1556	make-two-arrays-equal-by-reversing-subarrays			Easy
1557	check-if-a-string-contains-all-binary-codes-of-size-k		📝	Medium
1558	course-schedule-iv			Medium
1559	cherry-pickup-ii		📝	Hard
1560	number-of-students-doing-homework-at-a-given-time			Easy
1561	rearrange-words-in-a-sentence			Medium
1562	people-whose-list-of-favorite-companies-is-not-a-subset-of-another-list			Medium
1563	maximum-number-of-darts-inside-of-a-circular-dartboard			Hard
1566	check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence			Easy
1567	maximum-number-of-vowels-in-a-substring-of-given-length			Medium
1568	pseudo-palindromic-paths-in-a-binary-tree		📝	Medium
1569	max-dot-product-of-two-subsequences			Hard
1570	final-prices-with-a-special-discount-in-a-shop			Easy
1571	allocate-mailboxes			Hard
1572	subrectangle-queries			Medium
1573	find-two-non-overlapping-sub-arrays-each-with-target-sum			Medium
1574	maximum-product-of-two-elements-in-an-array			Easy
1575	maximum-area-of-a-piece-of-cake-after-horizontal-and-vertical-cuts		📝	Medium
1576	reorder-routes-to-make-all-paths-lead-to-the-city-zero			Medium
1577	probability-of-a-two-boxes-having-the-same-number-of-distinct-balls			Hard
1580	shuffle-the-array			Easy
1581	the-k-strongest-values-in-an-array			Medium
1582	design-browser-history			Medium
1583	paint-house-iii		📝	Hard
1584	average-salary-excluding-the-minimum-and-maximum-salary			Easy
1585	the-kth-factor-of-n		📝	Medium
1586	longest-subarray-of-1s-after-deleting-one-element			Medium
1587	parallel-courses-ii			Hard
1603	running-sum-of-1d-array		📝	Easy
1604	least-number-of-unique-integers-after-k-removals			Medium
1605	minimum-number-of-days-to-make-m-bouquets			Medium
1609	find-all-the-lonely-nodes	🔒		Easy
1610	xor-operation-in-an-array			Easy
1611	making-file-names-unique			Medium
1612	avoid-flood-in-the-city			Medium
1613	find-critical-and-pseudo-critical-edges-in-minimum-spanning-tree			Hard
1615	range-sum-of-sorted-subarray-sums			Medium
1616	minimum-difference-between-largest-and-smallest-value-in-three-moves			Medium
1617	stone-game-iv		📝	Hard
1618	delete-n-nodes-after-m-nodes-of-a-linked-list	🔒	📝	Easy
1619	path-crossing			Easy
1620	check-if-array-pairs-are-divisible-by-k			Medium
1621	number-of-subsequences-that-satisfy-the-given-sum-condition			Medium
1622	max-value-of-equation			Hard
1624	clone-binary-tree-with-random-pointer	🔒	📝	Medium
1626	can-make-arithmetic-progression-from-sequence			Easy
1627	last-moment-before-all-ants-fall-out-of-a-plank			Medium
1628	count-submatrices-with-all-ones			Medium
1629	minimum-possible-integer-after-at-most-k-adjacent-swaps-on-digits			Hard
1630	count-odd-numbers-in-an-interval-range			Easy
1631	number-of-sub-arrays-with-odd-sum			Medium
1632	number-of-good-ways-to-split-a-string			Medium
1633	minimum-number-of-increments-on-subarrays-to-form-a-target-array			Hard
1634	clone-n-ary-tree	🔒	📝	Medium
1635	number-of-good-pairs			Easy
1636	number-of-substrings-with-only-1s			Medium
1637	string-compression-ii		📝	Hard
1638	best-position-for-a-service-centre			Hard
1640	design-a-file-sharing-system	🔒		Medium
1642	water-bottles			Easy
1643	number-of-nodes-in-the-sub-tree-with-the-same-label			Medium
1644	maximum-number-of-non-overlapping-substrings			Hard
1645	find-a-value-of-a-mysterious-function-closest-to-target			Hard
1646	kth-missing-positive-number		📝	Easy
1647	can-convert-string-in-k-moves			Medium
1648	minimum-insertions-to-balance-a-parentheses-string			Medium
1649	maximum-number-of-non-overlapping-subarrays-with-sum-equals-target			Medium
1650	find-root-of-n-ary-tree	🔒	📝	Medium
1651	shuffle-string			Easy
1652	minimum-suffix-flips			Medium
1653	number-of-good-leaf-nodes-pairs			Medium
1655	move-sub-tree-of-n-ary-tree	🔒		Hard
1656	count-good-triplets			Easy
1657	find-the-winner-of-an-array-game			Medium
1658	minimum-swaps-to-arrange-a-binary-grid			Medium
1659	get-the-maximum-score			Hard
1660	thousand-separator			Easy
1661	minimum-number-of-vertices-to-reach-all-nodes			Medium
1662	minimum-numbers-of-function-calls-to-make-target-array			Medium
1663	detect-cycles-in-2d-grid			Medium
1665	diameter-of-n-ary-tree	🔒	📝	Medium
1666	make-the-string-great		📝	Easy
1667	find-kth-bit-in-nth-binary-string			Medium
1668	find-longest-awesome-substring			Hard
1669	minimum-cost-to-cut-a-stick			Hard
1672	find-the-index-of-the-large-integer	🔒		Medium
1674	minimum-operations-to-make-array-equal		📝	Medium
1675	magnetic-force-between-two-balls			Medium
1676	minimum-number-of-days-to-eat-n-oranges			Hard
1677	matrix-diagonal-sum			Easy
1678	number-of-ways-to-split-a-string			Medium
1679	shortest-subarray-to-be-removed-to-make-array-sorted			Medium
1680	count-all-possible-routes			Hard
1681	guess-the-majority-in-a-hidden-array	🔒		Medium
1682	most-visited-sector-in-a-circular-track			Easy
1683	maximum-number-of-coins-you-can-get			Medium
1684	find-latest-group-of-size-m			Medium
1685	stone-game-v			Hard
1687	the-most-similar-path-in-a-graph	🔒		Hard
1689	detect-pattern-of-length-m-repeated-k-or-more-times			Easy
1690	maximum-length-of-subarray-with-positive-product			Medium
1691	minimum-number-of-days-to-disconnect-island			Hard
1692	number-of-ways-to-reorder-array-to-get-same-bst			Hard
1693	sum-of-all-odd-length-subarrays			Easy
1694	make-sum-divisible-by-p			Medium
1695	maximum-sum-obtained-of-any-permutation			Medium
1696	strange-printer-ii			Hard
1697	strings-differ-by-one-character	🔒		Medium
1698	replace-all-s-to-avoid-consecutive-repeating-characters			Easy
1699	number-of-ways-where-square-of-number-is-equal-to-product-of-two-numbers			Medium
1700	minimum-time-to-make-rope-colorful		📝	Medium
1701	remove-max-number-of-edges-to-keep-graph-fully-traversable			Hard
1703	put-boxes-into-the-warehouse-i	🔒	📝	Medium
1704	special-positions-in-a-binary-matrix			Easy
1705	count-unhappy-friends			Medium
1706	min-cost-to-connect-all-points		📝	Medium
1707	check-if-string-is-transformable-with-substring-sort-operations			Hard
1708	design-parking-system			Easy
1709	alert-using-same-key-card-three-or-more-times-in-a-one-hour-period			Medium
1710	find-servers-that-handled-most-number-of-requests		📝	Hard
1711	find-valid-matrix-given-row-and-column-sums			Medium
1713	dot-product-of-two-sparse-vectors	🔒	📝	Medium
1714	rearrange-spaces-between-words			Easy
1715	split-a-string-into-the-max-number-of-unique-substrings			Medium
1716	maximum-non-negative-product-in-a-matrix			Medium
1717	minimum-cost-to-connect-two-groups-of-points			Hard
1719	put-boxes-into-the-warehouse-ii	🔒		Medium
1720	crawler-log-folder			Easy
1721	maximum-profit-of-operating-a-centennial-wheel			Medium
1722	throne-inheritance			Medium
1723	maximum-number-of-achievable-transfer-requests			Hard
1725	number-of-sets-of-k-non-overlapping-line-segments			Medium
1726	coordinate-with-maximum-network-quality			Medium
1727	cat-and-mouse-ii			Hard
1728	fancy-sequence			Hard
1729	binary-search-tree-iterator-ii	🔒	📝	Medium
1730	special-array-with-x-elements-greater-than-or-equal-x			Easy
1731	even-odd-tree			Medium
1732	minimum-one-bit-operations-to-make-integers-zero			Hard
1733	maximum-number-of-visible-points			Hard
1736	build-binary-expression-tree-from-infix-expression	🔒		Hard
1737	maximum-nesting-depth-of-the-parentheses			Easy
1738	maximal-network-rank	Python3		Medium
1739	split-two-strings-to-make-palindrome			Medium
1740	count-subtrees-with-max-distance-between-cities			Hard
1741	sort-array-by-increasing-frequency			Easy
1742	widest-vertical-area-between-two-points-containing-no-points			Medium
1743	count-substrings-that-differ-by-one-character			Medium
1744	number-of-ways-to-form-a-target-string-given-a-dictionary			Hard
1745	find-nearest-right-node-in-binary-tree	🔒	📝	Medium
1746	largest-substring-between-two-equal-characters			Easy
1747	lexicographically-smallest-string-after-applying-operations			Medium
1748	best-team-with-no-conflicts			Medium
1750	check-if-two-expression-trees-are-equivalent	🔒		Medium
1751	slowest-key		📝	Easy
1752	arithmetic-subarrays			Medium
1753	path-with-minimum-effort		📝	Medium
1755	defuse-the-bomb			Easy
1756	minimum-deletions-to-make-string-balanced	Python3		Medium
1757	minimum-jumps-to-reach-home			Medium
1758	distribute-repeating-integers			Hard
1760	check-array-formation-through-concatenation		📝	Easy
1761	count-sorted-vowel-strings		📝	Medium
1762	furthest-building-you-can-reach		📝	Medium
1764	maximum-repeating-substring			Easy
1765	merge-in-between-linked-lists			Medium
1766	minimum-number-of-removals-to-make-mountain-array			Hard
1767	design-front-middle-back-queue			Medium
1768	design-an-expression-tree-with-evaluate-function	🔒		Medium
1769	get-maximum-in-generated-array		📝	Easy
1770	minimum-deletions-to-make-character-frequencies-unique		📝	Medium
1771	sell-diminishing-valued-colored-balls			Medium
1772	create-sorted-array-through-instructions		📝	Hard
1774	add-two-polynomials-represented-as-linked-lists	🔒		Medium
1775	design-an-ordered-stream			Easy
1776	minimum-operations-to-reduce-x-to-zero		📝	Medium
1777	determine-if-two-strings-are-close		📝	Medium
1778	maximize-grid-happiness			Hard
1780	lowest-common-ancestor-of-a-binary-tree-ii	🔒		Medium
1781	check-if-two-string-arrays-are-equivalent		📝	Easy
1782	smallest-string-with-a-given-numeric-value		📝	Medium
1783	ways-to-make-a-fair-array			Medium
1784	minimum-initial-energy-to-finish-tasks			Hard
1786	count-the-number-of-consistent-strings			Easy
1787	sum-of-absolute-differences-in-a-sorted-array			Medium
1788	stone-game-vi			Medium
1789	delivering-boxes-from-storage-to-ports			Hard
1790	lowest-common-ancestor-of-a-binary-tree-iii	🔒		Medium
1791	richest-customer-wealth		📝	Easy
1792	find-the-most-competitive-subsequence		📝	Medium
1793	minimum-moves-to-make-array-complementary			Medium
1794	minimize-deviation-in-array		📝	Hard
1796	correct-a-binary-tree	🔒		Medium
1797	goal-parser-interpretation			Easy
1798	max-number-of-k-sum-pairs		📝	Medium
1799	minimum-incompatibility			Hard
1800	concatenation-of-consecutive-binary-numbers		📝	Medium
1802	number-of-students-unable-to-eat-lunch			Easy
1803	average-waiting-time			Medium
1804	maximum-binary-string-after-change			Medium
1805	minimum-adjacent-swaps-for-k-consecutive-ones			Hard
1806	count-of-matches-in-tournament			Easy
1807	partitioning-into-minimum-number-of-deci-binary-numbers		📝	Medium
1808	stone-game-vii		📝	Medium
1809	sum-of-special-evenly-spaced-elements-in-array	🔒		Hard
1810	change-the-root-of-a-binary-tree	🔒		Medium
1812	reformat-phone-number			Easy
1813	maximum-erasure-value		📝	Medium
1814	jump-game-vi		📝	Medium
1815	checking-existence-of-edge-length-limited-paths			Hard
1816	lowest-common-ancestor-of-a-binary-tree-iv	🔒		Medium
1817	calculate-money-in-leetcode-bank			Easy
1818	maximum-score-from-removing-substrings			Medium
1819	construct-the-lexicographically-largest-valid-sequence			Medium
1820	number-of-ways-to-reconstruct-a-tree			Hard
1822	longest-palindromic-subsequence-ii	🔒		Medium
1823	determine-if-string-halves-are-alike		📝	Easy
1824	maximum-number-of-eaten-apples		📝	Medium
1825	find-minimum-time-to-finish-all-jobs			Hard
1826	maximum-xor-with-an-element-from-array			Hard
1828	count-ways-to-distribute-candies	🔒		Hard
1829	maximum-units-on-a-truck		📝	Easy
1830	count-good-meals			Medium
1831	ways-to-split-array-into-three-subarrays		📝	Medium
1832	minimum-operations-to-make-a-subsequence			Hard
1833	find-the-highest-altitude			Easy
1834	minimum-number-of-people-to-teach			Medium
1835	decode-xored-permutation			Medium
1836	count-ways-to-make-array-with-product			Hard
1838	number-of-distinct-substrings-in-a-string	🔒		Medium
1839	decode-xored-array			Easy
1840	minimize-hamming-distance-after-swap-operations			Medium
1843	number-of-rectangles-that-can-form-the-largest-square			Easy
1844	maximum-number-of-balls-in-a-box			Easy
1845	largest-submatrix-with-rearrangements			Medium
1847	largest-subarray-length-k	🔒		Easy
1848	sum-of-unique-elements			Easy
1849	maximum-absolute-sum-of-any-subarray			Medium
1850	minimum-length-of-string-after-deleting-similar-ends			Medium
1851	maximum-number-of-events-that-can-be-attended-ii			Hard
1858	latest-time-by-replacing-hidden-digits			Easy
1859	change-minimum-characters-to-satisfy-one-of-three-conditions			Medium
1860	find-kth-largest-xor-coordinate-value			Medium
1861	building-boxes			Hard
1865	checking-existence-of-edge-length-limited-paths-ii	🔒		Hard
1866	restore-the-array-from-adjacent-pairs			Medium
1871	palindrome-partitioning-iv			Hard
1872	can-you-eat-your-favorite-candy-on-your-favorite-day			Medium
1873	longest-nice-substring			Easy
1874	form-array-by-concatenating-subarrays-of-another-array			Medium
1875	tree-of-coprimes			Hard
1876	map-of-highest-peak			Medium
1878	check-if-array-is-sorted-and-rotated			Easy
1879	maximum-score-from-removing-stones			Medium
1880	largest-merge-of-two-strings			Medium
1881	closest-subsequence-sum			Hard
1883	find-distance-in-a-binary-tree	🔒		Medium
1884	minimum-changes-to-make-alternating-binary-string			Easy
1885	count-number-of-homogenous-substrings			Medium
1886	minimum-limit-of-balls-in-a-bag			Medium
1887	minimum-degree-of-a-connected-trio-in-a-graph			Hard
1888	find-nearest-point-that-has-the-same-x-or-y-coordinate			Easy
1889	check-if-number-is-a-sum-of-powers-of-three			Medium
1890	sum-of-beauty-of-all-substrings			Medium
1891	count-pairs-of-nodes			Hard
1893	maximum-subarray-sum-after-one-operation	🔒		Medium
1894	merge-strings-alternately			Easy
1895	minimum-number-of-operations-to-move-all-balls-to-each-box			Medium
1896	maximum-score-from-performing-multiplication-operations		📝	Hard
1897	maximize-palindrome-length-from-subsequences			Hard
1899	count-items-matching-a-rule			Easy
1900	closest-dessert-cost			Medium
1901	equal-sum-arrays-with-minimum-number-of-operations			Medium
1902	car-fleet-ii			Hard
1903	design-most-recently-used-queue	🔒		Medium
1904	second-largest-digit-in-a-string			Easy
1905	design-authentication-manager			Medium
1906	maximize-score-after-n-operations			Hard
1907	count-pairs-with-xor-in-a-range			Hard
1909	buildings-with-an-ocean-view	🔒	📝	Medium
1910	check-if-binary-string-has-at-most-one-segment-of-ones			Easy
1911	minimum-elements-to-add-to-form-a-given-sum			Medium
1912	number-of-restricted-paths-from-first-to-last-node			Medium
1913	make-the-xor-of-all-segments-equal-to-zero			Hard
1915	check-if-one-string-swap-can-make-strings-equal			Easy
1916	find-center-of-star-graph			Easy
1917	maximum-average-pass-ratio			Medium
1918	maximum-score-of-a-good-subarray			Hard
1919	sort-features-by-popularity	🔒		Medium
1920	determine-color-of-a-chessboard-square			Easy
1923	sentence-similarity-iii			Medium
1924	maximum-number-of-groups-getting-fresh-donuts			Hard
1925	count-nice-pairs-in-an-array			Medium
1927	maximum-ascending-subarray-sum			Easy
1928	number-of-orders-in-the-backlog			Medium
1929	maximum-value-at-a-given-index-in-a-bounded-array			Medium
1930	maximum-number-of-consecutive-values-you-can-make			Medium
1931	shortest-path-in-a-hidden-grid	🔒		Medium
1933	number-of-different-integers-in-a-string			Easy
1934	evaluate-the-bracket-pairs-of-a-string			Medium
1935	minimum-number-of-operations-to-reinitialize-a-permutation			Medium
1936	maximize-number-of-nice-divisors			Hard
1937	maximize-the-beauty-of-the-garden	🔒		Hard
1938	minimum-operations-to-make-the-array-increasing			Easy
1939	queries-on-number-of-points-inside-a-circle			Medium
1940	maximum-xor-for-each-query			Medium
1941	minimum-number-of-operations-to-make-string-sorted			Hard
1943	count-pairs-of-equal-substrings-with-minimum-difference	🔒		Medium
1944	truncate-sentence			Easy
1945	finding-the-users-active-minutes			Medium
1946	minimum-absolute-sum-difference			Medium
1947	number-of-different-subsequences-gcds			Hard
1949	implement-trie-ii-prefix-tree	🔒		Medium
1950	sign-of-the-product-of-an-array			Easy
1951	find-the-winner-of-the-circular-game			Medium
1952	minimum-sideway-jumps			Medium
1953	finding-mk-average			Hard
1954	replace-all-digits-with-characters			Easy
1955	seat-reservation-manager			Medium
1956	maximum-element-after-decreasing-and-rearranging			Medium
1957	closest-room			Hard
1959	minimum-path-cost-in-a-hidden-grid	🔒		Medium
1960	check-if-the-sentence-is-pangram		📝	Easy
1961	maximum-ice-cream-bars			Medium
1962	single-threaded-cpu		📝	Medium
1963	find-xor-sum-of-all-pairs-bitwise-and			Hard
1965	sum-of-digits-in-base-k			Easy
1966	frequency-of-the-most-frequent-element			Medium
1967	longest-substring-of-all-vowels-in-order			Medium
1968	maximum-building-height			Hard
1969	maximum-number-of-accepted-invitations	🔒		Medium
1970	sorting-the-sentence			Easy
1971	incremental-memory-leak			Medium
1972	rotating-the-box			Medium
1975	minimum-distance-to-the-target-element			Easy
1976	splitting-a-string-into-descending-consecutive-values			Medium
1977	minimum-interval-to-include-each-query			Hard
1978	minimum-adjacent-swaps-to-reach-the-kth-smallest-number			Medium
1979	maximum-number-of-people-that-can-be-caught-in-tag	🔒		Medium
1980	faulty-sensor	🔒		Easy
1982	remove-duplicates-from-an-unsorted-linked-list	🔒		Medium
1983	maximum-population-year			Easy
1984	maximum-distance-between-a-pair-of-values			Medium
1985	maximum-subarray-min-product			Medium
1986	largest-color-value-in-a-directed-graph			Hard
1987	substrings-of-size-three-with-distinct-characters			Easy
1988	minimize-maximum-pair-sum-in-array			Medium
1989	minimum-xor-sum-of-two-arrays			Hard
1990	get-biggest-three-rhombus-sums-in-a-grid			Medium
1992	sort-linked-list-already-sorted-using-absolute-values	🔒		Medium
1993	sum-of-all-subset-xor-totals			Easy
1994	minimum-number-of-swaps-to-make-the-binary-string-alternating			Medium
1995	finding-pairs-with-a-certain-sum			Medium
1996	number-of-ways-to-rearrange-sticks-with-k-sticks-visible			Hard
1997	next-palindrome-using-same-digits	🔒		Hard
1999	longer-contiguous-segments-of-ones-than-zeros			Easy
2000	minimum-speed-to-arrive-on-time			Medium
2001	jump-game-vii			Medium
2002	stone-game-viii			Hard
2003	distinct-numbers-in-each-subarray	🔒		Medium
2005	check-if-all-the-integers-in-a-range-are-covered			Easy
2006	find-the-student-that-will-replace-the-chalk			Medium
2007	maximum-cost-of-trip-with-k-highways	🔒		Hard
2008	minimum-cost-to-change-the-final-value-of-expression			Hard
2009	longest-word-with-all-prefixes	🔒		Medium
2010	check-if-word-equals-summation-of-two-words			Easy
2011	maximum-value-after-insertion			Medium
2012	process-tasks-using-servers			Medium
2013	minimum-skips-to-arrive-at-meeting-on-time			Hard
2015	determine-whether-matrix-can-be-obtained-by-rotation			Easy
2016	reduction-operations-to-make-the-array-elements-equal			Medium
2017	minimum-number-of-flips-to-make-the-binary-string-alternating			Medium
2018	minimum-space-wasted-from-packaging			Hard
2019	product-of-two-run-length-encoded-arrays	🔒		Medium
2020	remove-one-element-to-make-the-array-strictly-increasing			Easy
2021	remove-all-occurrences-of-a-substring			Medium
2022	maximum-alternating-subsequence-sum			Medium
2023	design-movie-rental-system			Hard
2025	redistribute-characters-to-make-all-strings-equal			Easy
2026	merge-triplets-to-form-target-triplet			Medium
2027	maximum-number-of-removable-characters			Medium
2028	the-earliest-and-latest-rounds-where-players-compete			Hard
2029	minimize-product-sum-of-two-arrays	🔒	📝	Medium
2031	egg-drop-with-2-eggs-and-n-floors			Medium
2032	largest-odd-number-in-string			Easy
2033	the-number-of-full-rounds-you-have-played			Medium
2034	minimum-absolute-difference-queries			Medium
2035	count-sub-islands			Medium
2036	count-pairs-in-two-arrays	🔒		Medium
2037	count-square-sum-triples			Easy
2038	nearest-exit-from-entrance-in-maze		📝	Medium
2039	sum-game			Medium
2040	minimum-cost-to-reach-destination-in-time			Hard
2042	maximum-product-difference-between-two-pairs			Easy
2043	cyclically-rotating-a-grid			Medium
2044	number-of-wonderful-substrings			Medium
2045	cutting-ribbons	🔒		Medium
2047	find-a-peak-element-ii			Medium
2048	build-array-from-permutation			Easy
2049	eliminate-maximum-number-of-monsters			Medium
2050	count-good-numbers			Medium
2051	longest-common-subpath			Hard
2052	depth-of-bst-given-insertion-order	🔒		Medium
2053	check-if-all-characters-have-equal-number-of-occurrences			Easy
2054	the-number-of-the-smallest-unoccupied-chair			Medium
2055	describe-the-painting			Medium
2056	jump-game-viii	🔒		Medium
2058	concatenation-of-array			Easy
2059	unique-length-3-palindromic-subsequences			Medium
2060	merge-bsts-to-create-single-bst			Hard
2061	painting-a-grid-with-three-different-colors			Hard
2062	game-of-nim	🔒		Medium
2065	check-for-contradictions-in-equations	🔒		Hard
2066	add-minimum-number-of-rungs			Medium
2067	maximum-number-of-points-with-cost			Medium
2068	maximum-genetic-difference-query			Hard
2069	kth-smallest-subarray-sum	🔒		Medium
2070	check-if-string-is-decomposable-into-value-equal-substrings	🔒		Easy
2071	longest-common-subsequence-between-sorted-arrays	🔒		Medium
2072	maximum-of-minimum-values-in-all-subarrays	🔒		Medium
2073	minimum-time-for-k-virus-variants-to-spread	🔒		Hard
2074	erect-the-fence-ii	🔒		Hard
2075	brightest-position-on-street	🔒		Medium
2076	sum-of-digits-of-string-after-convert			Easy
2077	largest-number-after-mutating-substring			Medium
2078	maximum-compatibility-score-sum			Medium
2079	delete-duplicate-folders-in-system			Hard
2080	check-if-move-is-legal			Medium
2081	minimum-total-space-wasted-with-k-resizing-operations			Medium
2082	minimum-cost-to-separate-sentence-into-rows	🔒		Medium
2083	three-divisors			Easy
2084	maximum-number-of-weeks-for-which-you-can-work			Medium
2085	array-with-elements-not-equal-to-average-of-neighbors			Medium
2086	count-number-of-special-subsequences			Hard
2088	minimum-time-to-type-word-using-special-typewriter			Easy
2089	maximum-matrix-sum			Medium
2090	number-of-ways-to-arrive-at-destination			Medium
2091	number-of-ways-to-separate-numbers			Hard
2093	check-if-string-is-a-prefix-of-array			Easy
2094	remove-stones-to-minimize-the-total		📝	Medium
2095	minimum-number-of-swaps-to-make-the-string-balanced			Medium
2096	find-the-longest-valid-obstacle-course-at-each-position			Hard
2099	number-of-strings-that-appear-as-substrings-in-word			Easy
2100	minimum-non-zero-product-of-the-array-elements			Medium
2101	last-day-where-you-can-still-cross			Hard
2102	find-the-middle-index-in-array			Easy
2103	find-all-groups-of-farmland			Medium
2104	operations-on-tree			Medium
2105	the-number-of-good-subsets			Hard
2106	find-greatest-common-divisor-of-array			Easy
2107	find-unique-binary-string			Medium
2108	minimize-the-difference-between-target-and-chosen-elements			Medium
2109	find-array-given-subset-sums			Hard
2111	binary-searchable-numbers-in-an-unsorted-array	🔒		Medium
2112	minimum-difference-between-highest-and-lowest-of-k-scores			Easy
2113	find-the-kth-largest-integer-in-the-array			Medium
2114	minimum-number-of-work-sessions-to-finish-the-tasks			Medium
2115	number-of-unique-good-subsequences			Hard
2116	count-number-of-pairs-with-absolute-difference-k			Easy
2117	find-original-array-from-doubled-array		📝	Medium
2118	maximum-earnings-from-taxi			Medium
2119	minimum-number-of-operations-to-make-array-continuous			Hard
2121	find-if-path-exists-in-graph		📝	Easy
2122	count-special-quadruplets			Easy
2123	the-number-of-weak-characters-in-the-game		📝	Medium
2124	first-day-where-you-have-been-in-all-the-rooms			Medium
2125	gcd-sort-of-an-array			Hard
2126	count-nodes-equal-to-sum-of-descendants	🔒		Medium
2128	reverse-prefix-of-word			Easy
2129	number-of-pairs-of-interchangeable-rectangles			Medium
2130	maximum-product-of-the-length-of-two-palindromic-subsequences			Medium
2131	smallest-missing-genetic-value-in-each-subtree			Hard
2132	convert-1d-array-into-2d-array			Easy
2133	number-of-pairs-of-strings-with-concatenation-equal-to-target			Medium
2134	maximize-the-confusion-of-an-exam			Medium
2135	maximum-number-of-ways-to-partition-an-array			Hard
2137	final-value-of-variable-after-performing-operations			Easy
2138	sum-of-beauty-in-the-array			Medium
2139	detect-squares			Medium
2140	longest-subsequence-repeated-k-times			Hard
2141	smallest-greater-multiple-made-of-two-digits	🔒		Medium
2142	average-height-of-buildings-in-each-segment	🔒		Medium
2144	maximum-difference-between-increasing-elements			Easy
2145	grid-game			Medium
2146	check-if-word-can-be-placed-in-crossword			Medium
2147	the-score-of-students-solving-math-expression			Hard
2148	minimum-number-of-moves-to-seat-everyone			Easy
2149	remove-colored-pieces-if-both-neighbors-are-the-same-color			Medium
2150	kth-smallest-product-of-two-sorted-arrays			Hard
2151	the-time-when-the-network-becomes-idle			Medium
2153	subtree-removal-game-with-fibonacci-tree	🔒		Hard
2154	minimum-moves-to-convert-string			Easy
2155	find-missing-observations			Medium
2156	stone-game-ix			Medium
2157	smallest-k-length-subsequence-with-occurrences-of-a-letter			Hard
2159	two-out-of-three			Easy
2160	minimum-operations-to-make-a-uni-value-grid			Medium
2161	stock-price-fluctuation		📝	Medium
2162	partition-array-into-two-arrays-to-minimize-sum-difference			Hard
2163	kth-distinct-string-in-an-array			Easy
2164	two-best-non-overlapping-events			Medium
2165	plates-between-candles			Medium
2166	number-of-valid-move-combinations-on-chessboard			Hard
2168	check-if-numbers-are-ascending-in-a-sentence			Easy
2169	simple-bank-system			Medium
2170	count-number-of-maximum-bitwise-or-subsets			Medium
2171	second-minimum-time-to-reach-destination			Hard
2173	number-of-valid-words-in-a-sentence			Easy
2174	next-greater-numerically-balanced-number			Medium
2175	count-nodes-with-the-highest-score			Medium
2176	parallel-courses-iii			Hard
2177	check-whether-two-strings-are-almost-equivalent			Easy
2178	walking-robot-simulation-ii			Medium
2179	most-beautiful-item-for-each-query			Medium
2180	maximum-number-of-tasks-you-can-assign			Hard
2181	smallest-index-with-equal-value			Easy
2182	find-the-minimum-and-maximum-number-of-nodes-between-critical-points			Medium
2183	minimum-operations-to-convert-number			Medium
2184	check-if-an-original-string-exists-given-two-encoded-strings			Hard
2186	count-vowel-substrings-of-a-string			Easy
2187	vowels-of-all-substrings			Medium
2188	minimized-maximum-of-products-distributed-to-any-store			Medium
2189	maximum-path-quality-of-a-graph			Hard
2190	count-common-words-with-one-occurrence			Easy
2191	minimum-number-of-buckets-required-to-collect-rainwater-from-houses			Medium
2192	minimum-cost-homecoming-of-a-robot-in-a-grid			Medium
2193	count-fertile-pyramids-in-a-land			Hard
2195	time-needed-to-buy-tickets			Easy
2196	reverse-nodes-in-even-length-groups			Medium
2197	decode-the-slanted-ciphertext			Medium
2198	process-restricted-friend-requests			Hard
2199	two-furthest-houses-with-different-colors			Easy
2200	stamping-the-grid			Hard
2201	valid-arrangement-of-pairs			Hard
2202	sum-of-k-mirror-numbers			Hard
2203	number-of-spaces-cleaning-robot-cleaned	🔒		Medium
2204	find-subsequence-of-length-k-with-the-largest-sum			Easy
2205	find-good-days-to-rob-the-bank			Medium
2206	detonate-the-maximum-bombs			Medium
2207	sequentially-ordinal-rank-tracker			Hard
2209	number-of-equal-count-substrings	🔒		Medium
2210	find-target-indices-after-sorting-array			Easy
2211	k-radius-subarray-averages			Medium
2212	removing-minimum-and-maximum-from-array			Medium
2213	find-all-people-with-secret			Hard
2215	finding-3-digit-even-numbers			Easy
2216	delete-the-middle-node-of-a-linked-list		📝	Medium
2217	step-by-step-directions-from-a-binary-tree-node-to-another	Python3		Medium
2218	paths-in-maze-that-lead-to-same-room	🔒		Medium
2219	maximum-number-of-words-found-in-sentences			Easy
2220	find-all-possible-recipes-from-given-supplies			Medium
2221	check-if-a-parentheses-string-can-be-valid			Medium
2222	abbreviating-the-product-of-a-range			Hard
2225	substrings-that-begin-and-end-with-the-same-letter	🔒		Medium
2226	rings-and-rods			Easy
2227	sum-of-subarray-ranges		📝	Medium
2228	watering-plants-ii			Medium
2229	maximum-fruits-harvested-after-at-most-k-steps			Hard
2230	minimum-cost-to-reach-city-with-discounts	🔒		Medium
2231	find-first-palindromic-string-in-the-array			Easy
2232	adding-spaces-to-a-string			Medium
2233	number-of-smooth-descent-periods-of-a-stock			Medium
2234	minimum-operations-to-make-the-array-k-increasing			Hard
2235	capitalize-the-title			Easy
2236	maximum-twin-sum-of-a-linked-list			Medium
2237	longest-palindrome-by-concatenating-two-letter-words		📝	Medium
2238	a-number-after-a-double-reversal			Easy
2239	execution-of-all-suffix-instructions-staying-in-a-grid			Medium
2240	intervals-between-identical-elements			Medium
2241	recover-the-original-array			Hard
2242	subsequence-of-size-k-with-the-largest-even-sum	🔒		Medium
2243	check-if-all-as-appears-before-all-bs			Easy
2244	number-of-laser-beams-in-a-bank			Medium
2245	destroying-asteroids			Medium
2246	maximum-employees-to-be-invited-to-a-meeting			Hard
2247	number-of-unique-flavors-after-sharing-k-candies	🔒		Medium
2248	minimum-cost-of-buying-candies-with-discount			Easy
2249	count-the-hidden-sequences			Medium
2250	k-highest-ranked-items-within-a-price-range			Medium
2251	number-of-ways-to-divide-a-long-corridor			Hard
2254	check-if-every-row-and-column-contains-all-numbers			Easy
2255	minimum-swaps-to-group-all-1s-together-ii			Medium
2256	count-words-obtained-after-adding-a-letter			Medium
2257	earliest-possible-day-of-full-bloom		📝	Hard
2258	elements-in-array-after-removing-and-replacing-elements	🔒		Medium
2259	minimum-operations-to-remove-adjacent-ones-in-matrix	🔒		Hard
2260	divide-a-string-into-groups-of-size-k			Easy
2261	all-divisions-with-the-highest-score-of-a-binary-array			Medium
2262	solving-questions-with-brainpower			Medium
2263	maximum-running-time-of-n-computers			Hard
2264	minimum-sum-of-four-digit-number-after-splitting-digits			Easy
2265	partition-array-according-to-given-pivot			Medium
2266	minimum-cost-to-set-cooking-time			Medium
2267	minimum-difference-in-sums-after-removal-of-elements			Hard
2268	remove-all-ones-with-row-and-column-flips	🔒		Medium
2269	count-elements-with-strictly-smaller-and-greater-elements			Easy
2270	find-all-lonely-numbers-in-the-array			Medium
2271	rearrange-array-elements-by-sign			Medium
2272	maximum-good-people-based-on-statements			Hard
2273	pour-water-between-buckets-to-make-water-levels-equal	🔒		Medium
2274	keep-multiplying-found-values-by-two			Easy
2275	find-substring-with-given-hash-value			Hard
2276	groups-of-strings			Hard
2277	count-equal-and-divisible-pairs-in-an-array			Easy
2278	find-three-consecutive-integers-that-sum-to-a-given-number			Medium
2279	maximum-split-of-positive-even-integers			Medium
2280	count-good-triplets-in-an-array			Hard
2282	choose-numbers-from-two-arrays-in-range	🔒		Hard
2283	sort-even-and-odd-indices-independently			Easy
2284	smallest-value-of-the-rearranged-number			Medium
2285	design-bitset			Medium
2286	minimum-time-to-remove-all-cars-containing-illegal-goods			Hard
2287	minimum-number-of-lines-to-cover-points	🔒		Medium
2288	count-operations-to-obtain-zero			Easy
2289	minimum-operations-to-make-the-array-alternating			Medium
2290	removing-minimum-number-of-magic-beans			Medium
2291	maximum-and-sum-of-array			Hard
2292	counting-words-with-a-given-prefix			Easy
2293	minimum-number-of-steps-to-make-two-strings-anagram-ii			Medium
2294	minimum-time-to-complete-trips			Medium
2295	minimum-time-to-finish-the-race			Hard
2297	amount-of-new-area-painted-each-day	🔒		Hard
2298	count-integers-with-even-digit-sum			Easy
2299	merge-nodes-in-between-zeros			Medium
2300	construct-string-with-repeat-limit			Medium
2301	count-array-pairs-divisible-by-k			Hard
2303	unique-substrings-with-equal-digit-frequency	🔒		Medium
2304	cells-in-a-range-on-an-excel-sheet			Easy
2305	append-k-integers-with-minimal-sum			Medium
2306	create-binary-tree-from-descriptions			Medium
2307	replace-non-coprime-numbers-in-array			Hard
2308	divide-array-into-equal-pairs			Easy
2309	maximize-number-of-subsequences-in-a-string			Medium
2310	minimum-operations-to-halve-array-sum			Medium
2311	minimum-white-tiles-after-covering-with-carpets			Hard
2312	most-frequent-number-following-key-in-an-array			Easy
2314	remove-all-ones-with-row-and-column-flips-ii	🔒		Medium
2316	count-hills-and-valleys-in-an-array			Easy
2317	count-collisions-on-a-road			Medium
2318	maximum-points-in-an-archery-competition			Medium
2319	longest-substring-of-one-repeating-character			Hard
2320	find-all-k-distant-indices-in-an-array			Easy
2321	minimum-weighted-subgraph-with-the-required-paths			Hard
2322	number-of-ways-to-build-sturdy-brick-wall	🔒		Medium
2323	minimum-bit-flips-to-convert-number			Easy
2324	find-triangular-sum-of-an-array			Medium
2325	number-of-ways-to-select-buildings			Medium
2326	sum-of-scores-of-built-strings			Hard
2327	largest-number-after-digit-swaps-by-parity			Easy
2328	minimize-result-by-adding-parentheses-to-expression			Medium
2329	maximum-product-after-k-increments			Medium
2330	maximum-total-beauty-of-the-gardens			Hard
2331	intersection-of-multiple-arrays			Easy
2332	count-lattice-points-inside-a-circle			Medium
2333	count-number-of-rectangles-containing-each-point			Medium
2334	number-of-flowers-in-full-bloom			Hard
2337	remove-digit-from-number-to-maximize-result			Easy
2338	minimum-consecutive-cards-to-pick-up			Medium
2339	k-divisible-elements-subarrays			Medium
2340	total-appeal-of-a-string			Hard
2341	count-prefixes-of-a-given-string			Easy
2342	minimum-average-difference		📝	Medium
2343	count-unguarded-cells-in-the-grid			Medium
2344	escape-the-spreading-fire			Hard
2345	minimum-number-of-operations-to-convert-time			Easy
2346	largest-3-same-digit-number-in-string			Easy
2347	count-nodes-equal-to-average-of-subtree			Medium
2348	count-number-of-texts			Medium
2349	check-if-there-is-a-valid-parentheses-string-path			Hard
2350	find-closest-number-to-zero			Easy
2351	number-of-ways-to-buy-pens-and-pencils			Medium
2352	design-an-atm-machine			Medium
2353	maximum-score-of-a-node-sequence			Hard
2354	minimum-health-to-beat-game	🔒		Medium
2355	maximum-consecutive-floors-without-special-floors			Medium
2356	largest-combination-with-bitwise-and-greater-than-zero			Medium
2357	count-integers-in-intervals			Hard
2358	number-of-ways-to-split-array			Medium
2359	maximum-white-tiles-covered-by-a-carpet			Medium
2360	substring-with-largest-variance			Hard
2361	calculate-digit-sum-of-a-string			Easy
2362	minimum-rounds-to-complete-all-tasks			Medium
2363	maximum-trailing-zeros-in-a-cornered-path			Medium
2364	longest-path-with-different-adjacent-characters			Hard
2365	percentage-of-letter-in-string			Easy
2366	maximum-bags-with-full-capacity-of-rocks		📝	Medium
2367	minimum-lines-to-represent-a-line-chart			Medium
2368	sum-of-total-strength-of-wizards			Hard
2369	maximum-sum-score-of-array	🔒		Medium
2372	rearrange-characters-to-make-target-string			Easy
2373	apply-discount-to-prices			Medium
2374	steps-to-make-array-non-decreasing			Medium
2375	minimum-obstacle-removal-to-reach-corner			Hard
2377	check-if-number-has-equal-digit-count-and-digit-value			Easy
2378	sender-with-largest-word-count			Medium
2379	maximum-total-importance-of-roads			Medium
2380	booking-concert-tickets-in-groups			Hard
2383	add-two-integers			Easy
2384	root-equals-sum-of-children			Easy
2385	count-positions-on-street-with-required-brightness	🔒		Medium
2386	min-max-game			Easy
2387	partition-array-such-that-maximum-difference-is-k			Medium
2388	replace-elements-in-an-array			Medium
2389	design-a-text-editor			Hard
2390	naming-a-company			Hard
2391	strong-password-checker-ii			Easy
2392	successful-pairs-of-spells-and-potions			Medium
2393	match-substring-after-replacement			Hard
2394	count-subarrays-with-score-less-than-k			Hard
2395	longest-binary-subsequence-less-than-or-equal-to-k			Medium
2396	design-video-sharing-platform	🔒		Hard
2397	count-number-of-ways-to-place-houses			Medium
2398	check-if-matrix-is-x-matrix			Easy
2399	minimum-flips-in-binary-tree-to-get-result	🔒		Hard
2400	minimum-score-after-removals-on-a-tree			Hard
2401	count-asterisks			Easy
2402	maximum-xor-after-operations			Medium
2403	count-unreachable-pairs-of-nodes-in-an-undirected-graph			Medium
2404	number-of-distinct-roll-sequences			Hard
2405	minimum-number-of-keypresses	🔒		Medium
2406	decode-the-message			Easy
2408	number-of-people-aware-of-a-secret			Medium
2409	number-of-increasing-paths-in-a-grid			Hard
2411	spiral-matrix-iv			Medium
2412	minimum-amount-of-time-to-fill-cups			Easy
2413	smallest-number-in-infinite-set			Medium
2414	move-pieces-to-obtain-a-string			Medium
2415	count-the-number-of-ideal-arrays			Hard
2416	evaluate-boolean-binary-tree			Easy
2417	the-latest-time-to-catch-a-bus			Medium
2418	minimum-sum-of-squared-difference			Medium
2419	subarray-with-elements-greater-than-varying-threshold			Hard
2420	closest-node-to-path-in-tree	🔒		Hard
2421	maximum-number-of-pairs-in-array			Easy
2422	query-kth-smallest-trimmed-number			Medium
2423	minimum-deletions-to-make-array-divisible			Hard
2425	number-of-people-that-can-be-seen-in-a-grid	🔒		Medium
2426	maximum-profit-from-trading-stocks	🔒		Medium
2427	first-letter-to-appear-twice			Easy
2428	equal-row-and-column-pairs			Medium
2429	design-a-food-rating-system			Medium
2430	number-of-excellent-pairs			Hard
2432	number-of-zero-filled-subarrays		📝	Medium
2433	best-poker-hand			Easy
2434	design-a-number-container-system			Medium
2435	shortest-impossible-sequence-of-rolls			Hard
2436	make-array-zero-by-subtracting-equal-amounts			Easy
2437	maximum-number-of-groups-entering-a-competition			Medium
2438	find-closest-node-to-given-two-nodes			Medium
2439	longest-cycle-in-a-graph			Hard
2442	number-of-arithmetic-triplets			Easy
2443	check-if-there-is-a-valid-partition-for-the-array			Medium
2444	longest-ideal-subsequence			Medium
2445	reachable-nodes-with-restrictions		📝	Medium
2447	merge-similar-items			Easy
2448	count-number-of-bad-pairs			Medium
2449	maximum-number-of-robots-within-budget			Hard
2450	minimum-replacements-to-sort-the-array			Hard
2454	largest-local-values-in-a-matrix			Easy
2455	node-with-highest-edge-score			Medium
2456	construct-smallest-number-from-di-string			Medium
2457	count-special-integers			Hard
2458	find-minimum-time-to-finish-all-jobs-ii	🔒		Medium
2459	minimum-hours-of-training-to-win-a-competition			Easy
2461	amount-of-time-for-binary-tree-to-be-infected			Medium
2462	find-the-k-sum-of-an-array			Hard
2463	minimum-recolors-to-get-k-consecutive-black-blocks			Easy
2464	time-needed-to-rearrange-a-binary-string			Medium
2465	shifting-letters-ii			Medium
2466	maximum-segment-sum-after-removals			Hard
2468	valid-palindrome-iv	🔒		Medium
2469	longest-subsequence-with-limited-sum		📝	Easy
2470	removing-stars-from-a-string			Medium
2471	minimum-amount-of-time-to-collect-garbage			Medium
2472	build-a-matrix-with-conditions			Hard
2473	max-sum-of-a-pair-with-equal-sum-of-digits			Medium
2474	minimum-adjacent-swaps-to-make-a-valid-array	🔒		Medium
2475	largest-palindromic-number			Medium
2476	check-distances-between-same-letters			Easy
2477	number-of-ways-to-reach-a-position-after-exactly-k-steps			Medium
2478	longest-nice-subarray			Medium
2479	meeting-rooms-iii			Hard
2480	find-subarrays-with-equal-sum			Easy
2481	strictly-palindromic-number			Medium
2482	maximum-rows-covered-by-columns			Medium
2483	task-scheduler-ii			Medium
2485	finding-the-number-of-visible-mountains	🔒		Medium
2486	most-frequent-even-element			Easy
2487	optimal-partition-of-string			Medium
2488	divide-intervals-into-minimum-number-of-groups			Medium
2490	maximum-number-of-books-you-can-take	🔒		Hard
2491	smallest-even-multiple			Easy
2492	length-of-the-longest-alphabetical-continuous-substring			Medium
2493	reverse-odd-levels-of-binary-tree			Medium
2494	sum-of-prefix-scores-of-strings			Hard
2496	count-days-spent-together			Easy
2497	maximum-matching-of-players-with-trainers			Medium
2498	smallest-subarrays-with-maximum-bitwise-or			Medium
2499	minimum-money-required-before-transactions			Hard
2500	minimum-costs-using-the-train-line	🔒		Hard
2502	sort-the-people			Easy
2503	longest-subarray-with-maximum-bitwise-and			Medium
2504	find-all-good-indices			Medium
2505	number-of-good-paths			Hard
2506	minimize-maximum-value-in-a-grid	🔒		Hard
2507	number-of-common-factors			Easy
2508	maximum-sum-of-an-hourglass			Medium
2509	minimize-xor			Medium
2510	maximum-deletions-on-a-string			Hard
2512	longest-uploaded-prefix			Medium
2513	number-of-pairs-satisfying-inequality			Hard
2517	choose-edges-to-maximize-score-in-a-tree	🔒		Medium
2518	the-employee-that-worked-on-the-longest-task			Easy
2519	find-the-original-array-of-prefix-xor			Medium
2520	using-a-robot-to-print-the-lexicographically-smallest-string			Medium
2521	paths-in-matrix-whose-sum-is-divisible-by-k			Hard
2522	median-of-a-row-wise-sorted-matrix	🔒		Medium
2524	largest-positive-integer-that-exists-with-its-negative			Easy
2525	count-number-of-distinct-integers-after-reverse-operations			Medium
2526	longest-increasing-subsequence-ii			Hard
2527	count-subarrays-with-fixed-bounds			Hard
2528	number-of-valid-clock-times			Easy
2529	range-product-queries-of-powers			Medium
2530	minimize-maximum-of-array			Medium
2531	create-components-with-same-value			Hard
2532	remove-letter-to-equalize-frequency			Easy
2533	bitwise-xor-of-all-pairings			Medium
2535	count-strictly-increasing-subarrays	🔒		Medium
2537	minimum-time-to-kill-all-monsters	🔒		Hard
2541	sum-of-number-and-its-reverse			Medium
2555	design-sql	🔒		Medium
2560	closest-fair-integer	🔒		Medium
2565	merge-operations-to-turn-array-into-a-palindrome	🔒		Medium
2570	maximize-total-tastiness-of-purchased-fruits	🔒		Medium
2579	minimum-split-into-subarrays-with-gcd-greater-than-one	🔒		Medium
2584	number-of-nodes-with-value-one	🔒		Medium