LeetCode

LeetCode Problems' Solutions [话题分类]

[1-50]	[51-100]	[101-150]	[151-200]	[201-250]	[251-300]
[301-350]	[351-400]	[401-450]	[451-500]	[501-550]	[551-600]
[601-650]	[651-700]	[701-750]	[751-800]	[801-850]	[851-900]
[901-950]	[951-1000]	[1001-1050]	[1051-1100]	[1101-1150]	[1151-1200]

#	Title	Solution	Difficulty
1032	Stream of Characters	Go	Hard
1031	Maximum Sum of Two Non-Overlapping Subarrays	Go	Medium
1030	Matrix Cells in Distance Order	Go	Easy
1029	Two City Scheduling	Go	Easy
1028	Recover a Tree From Preorder Traversal	Go	Hard
1027	Longest Arithmetic Sequence	Go	Medium
1026	Maximum Difference Between Node and Ancestor	Go	Medium
1025	Divisor Game	Go	Easy
1024	Video Stitching	Go	Medium
1023	Camelcase Matching	Go	Medium
1022	Sum of Root To Leaf Binary Numbers	Go	Easy
1021	Remove Outermost Parentheses	Go	Easy
1020	Number of Enclaves	Go	Medium
1019	Next Greater Node In Linked List	Go	Medium
1018	Binary Prefix Divisible By 5	Go	Easy
1017	Convert to Base -2	Go	Medium
1016	Binary String With Substrings Representing 1 To N	Go	Medium
1015	Smallest Integer Divisible by K	Go	Medium
1014	Best Sightseeing Pair	Go	Medium
1013	Partition Array Into Three Parts With Equal Sum	Go	Easy
1012	Numbers With Repeated Digits	Go	Hard
1011	Capacity To Ship Packages Within D Days	Go	Medium
1010	Pairs of Songs With Total Durations Divisible by 60	Go	Easy
1009	Complement of Base 10 Integer	Go	Easy
1008	Construct Binary Search Tree from Preorder Traversal	Go	Medium
1007	Minimum Domino Rotations For Equal Row	Go	Medium
1006	Clumsy Factorial	Go	Medium
1005	Maximize Sum Of Array After K Negations	Go	Easy
1004	Max Consecutive Ones III	Go	Medium
1003	Check If Word Is Valid After Substitutions	Go	Medium
1002	Find Common Characters	Go	Easy
1001	Grid Illumination	Go	Hard
1000	Minimum Cost to Merge Stones	Go	Hard
999	Available Captures for Rook	Go	Easy
998	Maximum Binary Tree II	Go	Medium
997	Find the Town Judge	Go	Easy
996	Number of Squareful Arrays	Go	Hard
995	Minimum Number of K Consecutive Bit Flips	Go	Hard
994	Rotting Oranges	Go	Easy
993	Cousins in Binary Tree	Go	Easy
992	Subarrays with K Different Integers	Go	Hard
991	Broken Calculator	Go	Medium
990	Satisfiability of Equality Equations	Go	Medium
989	Add to Array-Form of Integer	Go	Easy
988	Smallest String Starting From Leaf	Go	Medium
987	Vertical Order Traversal of a Binary Tree	Go	Medium
986	Interval List Intersections	Go	Medium
985	Sum of Even Numbers After Queries	Go	Easy
984	String Without AAA or BBB	Go	Medium
983	Minimum Cost For Tickets	Go	Medium
982	Triples with Bitwise AND Equal To Zero	Go	Hard
981	Time Based Key-Value Store	Go	Medium
980	Unique Paths III	Go	Hard
979	Distribute Coins in Binary Tree	Go	Medium
978	Longest Turbulent Subarray	Go	Medium
977	Squares of a Sorted Array	Go	Easy
976	Largest Perimeter Triangle	Go	Easy
975	Odd Even Jump	Go	Hard
974	Subarray Sums Divisible by K	Go	Medium
973	K Closest Points to Origin	Go	Medium
972	Equal Rational Numbers	Go	Hard
971	Flip Binary Tree To Match Preorder Traversal	Go	Medium
970	Powerful Integers	Go	Easy
969	Pancake Sorting	Go	Medium
968	Binary Tree Cameras	Go	Hard
967	Numbers With Same Consecutive Differences	Go	Medium
966	Vowel Spellchecker	Go	Medium
965	Univalued Binary Tree	Go	Easy
964	Least Operators to Express Number	Go	Hard
963	Minimum Area Rectangle II	Go	Medium
962	Maximum Width Ramp	Go	Medium
961	N-Repeated Element in Size 2N Array	Go	Easy
960	Delete Columns to Make Sorted III	Go	Hard
959	Regions Cut By Slashes	Go	Medium
958	Check Completeness of a Binary Tree	Go	Medium
957	Prison Cells After N Days	Go	Medium
956	Tallest Billboard	Go	Hard
955	Delete Columns to Make Sorted II	Go	Medium
954	Array of Doubled Pairs	Go	Medium
953	Verifying an Alien Dictionary	Go	Easy
952	Largest Component Size by Common Factor	Go	Hard
951	Flip Equivalent Binary Trees	Go	Medium
950	Reveal Cards In Increasing Order	Go	Medium
949	Largest Time for Given Digits	Go	Easy
948	Bag of Tokens	Go	Medium
947	Most Stones Removed with Same Row or Column	Go	Medium
946	Validate Stack Sequences	Go	Medium
945	Minimum Increment to Make Array Unique	Go	Medium
944	Delete Columns to Make Sorted	Go	Easy
943	Find the Shortest Superstring	Go	Hard
942	DI String Match	Go	Easy
941	Valid Mountain Array	Go	Easy
940	Distinct Subsequences II	Go	Hard
939	Minimum Area Rectangle	Go	Medium
938	Range Sum of BST	Go	Medium
937	Reorder Log Files	Go	Easy
936	Stamping The Sequence	Go	Hard
935	Knight Dialer	Go	Medium
934	Shortest Bridge	Go	Medium
933	Number of Recent Calls	Go	Easy
932	Beautiful Array	Go	Medium
931	Minimum Falling Path Sum	Go	Medium
930	Binary Subarrays With Sum	Go	Medium
929	Unique Email Addresses	Go	Easy
928	Minimize Malware Spread II	Go	Hard
927	Three Equal Parts	Go	Hard
926	Flip String to Monotone Increasing	Go	Medium
925	Long Pressed Name	Go	Easy
924	Minimize Malware Spread	Go	Hard
923	3Sum With Multiplicity	Go	Medium
922	Sort Array By Parity II	Go	Easy
921	Minimum Add to Make Parentheses Valid	Go	Medium
920	Number of Music Playlists	Go	Hard
919	Complete Binary Tree Inserter	Go	Medium
918	Maximum Sum Circular Subarray	Go	Medium
917	Reverse Only Letters	Go	Easy
916	Word Subsets	Go	Medium
915	Partition Array into Disjoint Intervals	Go	Medium
914	X of a Kind in a Deck of Cards	Go	Easy
913	Cat and Mouse	Go	Hard
912	Sort an Array	Go	Medium
911	Online Election	Go	Medium
910	Smallest Range II	Go	Medium
909	Snakes and Ladders	Go	Medium
908	Smallest Range I	Go	Easy
907	Sum of Subarray Minimums	Go	Medium
906	Super Palindromes	Go	Hard
905	Sort Array By Parity	Go	Easy
904	Fruit Into Baskets	Go	Medium
903	Valid Permutations for DI Sequence	Go	Hard
902	Numbers At Most N Given Digit Set	Go	Hard
901	Online Stock Span	Go	Medium
900	RLE Iterator	Go	Medium
899	Orderly Queue	Go	Hard
898	Bitwise ORs of Subarrays	Go	Medium
897	Increasing Order Search Tree	Go	Easy
896	Monotonic Array	Go	Easy
895	Maximum Frequency Stack	Go	Hard
894	All Possible Full Binary Trees	Go	Medium
893	Groups of Special-Equivalent Strings	Go	Easy
892	Surface Area of 3D Shapes	Go	Easy
891	Sum of Subsequence Widths	Go	Hard
890	Find and Replace Pattern	Go	Medium
889	Construct Binary Tree from Preorder and Postorder Traversal	Go	Medium
888	Fair Candy Swap	Go	Easy
887	Super Egg Drop	Go	Hard
886	Possible Bipartition	Go	Medium
885	Spiral Matrix III	Go	Medium
884	Uncommon Words from Two Sentences	Go	Easy
883	Projection Area of 3D Shapes	Go	Easy
882	Reachable Nodes In Subdivided Graph	Go	Hard
881	Boats to Save People	Go	Medium
880	Decoded String at Index	Go	Medium
879	Profitable Schemes	Go	Hard
878	Nth Magical Number	Go	Hard
877	Stone Game	Go	Medium
876	Middle of the Linked List	Go	Easy
875	Koko Eating Bananas	Go	Medium
874	Walking Robot Simulation	Go	Easy
873	Length of Longest Fibonacci Subsequence	Go	Medium
872	Leaf-Similar Trees	Go	Easy
871	Minimum Number of Refueling Stops	Go	Hard
870	Advantage Shuffle	Go	Medium
869	Reordered Power of 2	Go	Medium
868	Binary Gap	Go	Easy
867	Transpose Matrix	Go	Easy
866	Prime Palindrome	Go	Medium
865	Smallest Subtree with all the Deepest Nodes	Go	Medium
864	Shortest Path to Get All Keys	Go	Hard
863	All Nodes Distance K in Binary Tree	Go	Medium
862	Shortest Subarray with Sum at Least K	Go	Hard
861	Score After Flipping Matrix	Go	Medium
860	Lemonade Change	Go	Easy
859	Buddy Strings	Go	Easy
858	Mirror Reflection	Go	Medium
857	Minimum Cost to Hire K Workers	Go	Hard
856	Score of Parentheses	Go	Medium
855	Exam Room	Go	Medium
854	K-Similar Strings	Go	Hard
853	Car Fleet	Go	Medium
852	Peak Index in a Mountain Array	Go	Easy
851	Loud and Rich	Go	Medium
850	Rectangle Area II	Go	Hard
849	Maximize Distance to Closest Person	Go	Easy
848	Shifting Letters	Go	Medium
847	Shortest Path Visiting All Nodes	Go	Hard
846	Hand of Straights	Go	Medium
845	Longest Mountain in Array	Go	Medium
844	Backspace String Compare	Go	Easy
843	Guess the Word	Go	Hard
842	Split Array into Fibonacci Sequence	Go	Medium
841	Keys and Rooms	Go	Medium
840	Magic Squares In Grid	Go	Easy
839	Similar String Groups	Go	Hard
838	Push Dominoes	Go	Medium
837	New 21 Game	Go	Medium
836	Rectangle Overlap	Go	Easy
835	Image Overlap	Go	Medium
834	Sum of Distances in Tree	Go	Hard
833	Find And Replace in String	Go	Medium
832	Flipping an Image	Go	Easy
831	Masking Personal Information	Go	Medium
830	Positions of Large Groups	Go	Easy
829	Consecutive Numbers Sum	Go	Hard
828	Unique Letter String	Go	Hard
827	Making A Large Island	Go	Hard
826	Most Profit Assigning Work	Go	Medium
825	Friends Of Appropriate Ages	Go	Medium
824	Goat Latin	Go	Easy
823	Binary Trees With Factors	Go	Medium
822	Card Flipping Game	Go	Medium
821	Shortest Distance to a Character	Go	Easy
820	Short Encoding of Words	Go	Medium
819	Most Common Word	Go	Easy
818	Race Car	Go	Hard
817	Linked List Components	Go	Medium
816	Ambiguous Coordinates	Go	Medium
815	Bus Routes	Go	Hard
814	Binary Tree Pruning	Go	Medium
813	Largest Sum of Averages	Go	Medium
812	Largest Triangle Area	Go	Easy
811	Subdomain Visit Count	Go	Easy
810	Chalkboard XOR Game	Go	Hard
809	Expressive Words	Go	Medium
808	Soup Servings	Go	Medium
807	Max Increase to Keep City Skyline	Go	Medium
806	Number of Lines To Write String	Go	Easy
805	Split Array With Same Average	Go	Hard
804	Unique Morse Code Words	Go	Easy
803	Bricks Falling When Hit	Go	Hard
802	Find Eventual Safe States	Go	Medium
801	Minimum Swaps To Make Sequences Increasing	Go	Medium
800	Similar RGB Color 🔒	Go	Easy
799	Champagne Tower	Go	Medium
798	Smallest Rotation with Highest Score	Go	Hard
797	All Paths From Source to Target	Go	Medium
796	Rotate String	Go	Easy
795	Number of Subarrays with Bounded Maximum	Go	Medium
794	Valid Tic-Tac-Toe State	Go	Medium
793	Preimage Size of Factorial Zeroes Function	Go	Hard
792	Number of Matching Subsequences	Go	Medium
791	Custom Sort String	Go	Medium
790	Domino and Tromino Tiling	Go	Medium
789	Escape The Ghosts	Go	Medium
788	Rotated Digits	Go	Easy
787	Cheapest Flights Within K Stops	Go	Medium
786	K-th Smallest Prime Fraction	Go	Hard
785	Is Graph Bipartite?	Go	Medium
784	Letter Case Permutation	Go	Easy
783	Minimum Distance Between BST Nodes	Go	Easy
782	Transform to Chessboard	Go	Hard
781	Rabbits in Forest	Go	Medium
780	Reaching Points	Go	Hard
779	K-th Symbol in Grammar	Go	Medium
778	Swim in Rising Water	Go	Hard
777	Swap Adjacent in LR String	Go	Medium
776	Split BST 🔒	Go	Medium
775	Global and Local Inversions	Go	Medium
774	Minimize Max Distance to Gas Station 🔒	Go	Hard
773	Sliding Puzzle	Go	Hard
772	Basic Calculator III 🔒	Go	Hard
771	Jewels and Stones	Go	Easy
770	Basic Calculator IV	Go	Hard
769	Max Chunks To Make Sorted	Go	Medium
768	Max Chunks To Make Sorted II	Go	Hard
767	Reorganize String	Go	Medium
766	Toeplitz Matrix	Go	Easy
765	Couples Holding Hands	Go	Hard
764	Largest Plus Sign	Go	Medium
763	Partition Labels	Go	Medium
762	Prime Number of Set Bits in Binary Representation	Go	Easy
761	Special Binary String	Go	Hard
760	Find Anagram Mappings 🔒	Go	Easy
759	Employee Free Time 🔒	Go	Hard
758	Bold Words in String 🔒	Go	Easy
757	Set Intersection Size At Least Two	Go	Hard
756	Pyramid Transition Matrix	Go	Medium
755	Pour Water 🔒	Go	Medium
754	Reach a Number	Go	Easy
753	Cracking the Safe	Go	Hard
752	Open the Lock	Go	Medium
751	IP to CIDR 🔒	Go	Easy
750	Number Of Corner Rectangles 🔒	Go	Medium
749	Contain Virus	Go	Hard
748	Shortest Completing Word	Go	Easy
747	Largest Number At Least Twice of Others	Go	Easy
746	Min Cost Climbing Stairs	Go	Easy
745	Prefix and Suffix Search	Go	Hard
744	Find Smallest Letter Greater Than Target	Go	Easy
743	Network Delay Time	Go	Medium
742	Closest Leaf in a Binary Tree 🔒	Go	Medium
741	Cherry Pickup	Go	Hard
740	Delete and Earn	Go	Medium
739	Daily Temperatures	Go	Medium
738	Monotone Increasing Digits	Go	Medium
737	Sentence Similarity II 🔒	Go	Medium
736	Parse Lisp Expression	Go	Hard
735	Asteroid Collision	Go	Medium
734	Sentence Similarity 🔒	Go	Easy
733	Flood Fill	Go	Easy
732	My Calendar III	Go	Hard
731	My Calendar II	Go	Medium
730	Count Different Palindromic Subsequences	Go	Hard
729	My Calendar I	Go	Medium
728	Self Dividing Numbers	Go	Easy
727	Minimum Window Subsequence 🔒	Go	Hard
726	Number of Atoms	Go	Hard
725	Split Linked List in Parts	Go	Medium
724	Find Pivot Index	Go	Easy
723	Candy Crush 🔒	Go	Medium
722	Remove Comments	Go	Medium
721	Accounts Merge	Go	Medium
720	Longest Word in Dictionary	Go	Easy
719	Find K-th Smallest Pair Distance	Go	Hard
718	Maximum Length of Repeated Subarray	Go	Medium
717	1-bit and 2-bit Characters	Go	Easy
716	Max Stack 🔒	Go	Easy
715	Range Module	Go	Hard
714	Best Time to Buy and Sell Stock with Transaction Fee	Go	Medium
713	Subarray Product Less Than K	Go	Medium
712	Minimum ASCII Delete Sum for Two Strings	Go	Medium
711	Number of Distinct Islands II 🔒	Go	Hard
710	Random Pick with Blacklist	Go	Hard
709	To Lower Case	Go	Easy
708	Insert into a Cyclic Sorted List 🔒	Go	Medium
707	Design Linked List	Go	Easy
706	Design HashMap	Go	Easy
705	Design HashSet	Go	Easy
704	Binary Search	Go	Easy
703	Kth Largest Element in a Stream	Go	Easy
702	Search in a Sorted Array of Unknown Size 🔒	Go	Medium
701	Insert into a Binary Search Tree	Go	Medium
700	Search in a Binary Search Tree	Go	Easy
699	Falling Squares	Go	Hard
698	Partition to K Equal Sum Subsets	Go	Medium
697	Degree of an Array	Go	Easy
696	Count Binary Substrings	Go	Easy
695	Max Area of Island	Go	Medium
694	Number of Distinct Islands 🔒	Go	Medium
693	Binary Number with Alternating Bits	Go	Easy
692	Top K Frequent Words	Go	Medium
691	Stickers to Spell Word	Go	Hard
690	Employee Importance	Go	Easy
689	Maximum Sum of 3 Non-Overlapping Subarrays	Go	Hard
688	Knight Probability in Chessboard	Go	Medium
687	Longest Univalue Path	Go	Easy
686	Repeated String Match	Go	Easy
685	Redundant Connection II	Go	Hard
684	Redundant Connection	Go	Medium
683	K Empty Slots 🔒	Go	Hard
682	Baseball Game	Go	Easy
681	Next Closest Time 🔒	Go	Medium
680	Valid Palindrome II	Go	Easy
679	24 Game	Go	Hard
678	Valid Parenthesis String	Go	Medium
677	Map Sum Pairs	Go	Medium
676	Implement Magic Dictionary	Go	Medium
675	Cut Off Trees for Golf Event	Go	Hard
674	Longest Continuous Increasing Subsequence	Go	Easy
673	Number of Longest Increasing Subsequence	Go	Medium
672	Bulb Switcher II	Go	Medium
671	Second Minimum Node In a Binary Tree	Go	Easy
670	Maximum Swap	Go	Medium
669	Trim a Binary Search Tree	Go	Easy
668	Kth Smallest Number in Multiplication Table	Go	Hard
667	Beautiful Arrangement II	Go	Medium
666	Path Sum IV 🔒	Go	Medium
665	Non-decreasing Array	Go	Easy
664	Strange Printer	Go	Hard
663	Equal Tree Partition 🔒	Go	Medium
662	Maximum Width of Binary Tree	Go	Medium
661	Image Smoother	Go	Easy
660	Remove 9 🔒	Go	Hard
659	Split Array into Consecutive Subsequences	Go	Medium
658	Find K Closest Elements	Go	Medium
657	Robot Return to Origin	Go	Easy
656	Coin Path 🔒	Go	Hard
655	Print Binary Tree	Go	Medium
654	Maximum Binary Tree	Go	Medium
653	Two Sum IV - Input is a BST	Go	Easy
652	Find Duplicate Subtrees	Go	Medium
651	4 Keys Keyboard 🔒	Go	Medium
650	2 Keys Keyboard	Go	Medium
649	Dota2 Senate	Go	Medium
648	Replace Words	Go	Medium
647	Palindromic Substrings	Go	Medium
646	Maximum Length of Pair Chain	Go	Medium
645	Set Mismatch	Go	Easy
644	Maximum Average Subarray II 🔒	Go	Hard
643	Maximum Average Subarray I	Go	Easy
642	Design Search Autocomplete System 🔒	Go	Hard
641	Design Circular Deque	Go	Medium
640	Solve the Equation	Go	Medium
639	Decode Ways II	Go	Hard
638	Shopping Offers	Go	Medium
637	Average of Levels in Binary Tree	Go	Easy
636	Exclusive Time of Functions	Go	Medium
635	Design Log Storage System 🔒	Go	Medium
634	Find the Derangement of An Array 🔒	Go	Medium
633	Sum of Square Numbers	Go	Easy
632	Smallest Range	Go	Hard
631	Design Excel Sum Formula 🔒	Go	Hard
630	Course Schedule III	Go	Hard
629	K Inverse Pairs Array	Go	Hard
628	Maximum Product of Three Numbers	Go	Easy
627	Swap Salary	MySQL	Easy
626	Exchange Seats	MySQL	Medium
625	Minimum Factorization 🔒	Go	Medium
624	Maximum Distance in Arrays 🔒	Go	Easy
623	Add One Row to Tree	Go	Medium
622	Design Circular Queue	Go	Medium
621	Task Scheduler	Go	Medium
620	Not Boring Movies	MySQL	Easy
619	Biggest Single Number 🔒	MySQL	Easy
618	Students Report By Geography 🔒	MySQL	Hard
617	Merge Two Binary Trees	Go	Easy
616	Add Bold Tag in String 🔒	Go	Medium
615	Average Salary: Departments VS Company 🔒	MySQL	Hard
614	Second Degree Follower 🔒	MySQL	Medium
613	Shortest Distance in a Line 🔒	MySQL	Easy
612	Shortest Distance in a Plane 🔒	MySQL	Medium
611	Valid Triangle Number	Go	Medium
610	Triangle Judgement 🔒	MySQL	Easy
609	Find Duplicate File in System	Go	Medium
608	Tree Node 🔒	MySQL	Medium
607	Sales Person 🔒	MySQL	Easy
606	Construct String from Binary Tree	Go	Easy
605	Can Place Flowers	Go	Easy
604	Design Compressed String Iterator 🔒	Go	Easy
603	Consecutive Available Seats 🔒	MySQL	Easy
602	Friend Requests II: Who Has the Most Friends 🔒	MySQL	Medium
601	Human Traffic of Stadium	MySQL	Hard