@@ -338,15 +338,125 @@ Better order to solve problems
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4 . 1617 (Count Subtrees With Max Distance Between Cities)
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5 . 1125 (Smallest Sufficient Team)
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- ### Prefix sum
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- 303 .
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- 724 . 560 . 304 . 1314 . 268 .
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- 287 . 189 . 896 . 674 .
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+ ### Ru companies
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- ### Tips && Trics
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+ ##### Anagramms, Math, Simple nums
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- 102 . = 199.
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- 100 . = 101
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+ 242 . Valid Anagram
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+ 49 . Group Angagrams
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+ 204 . Count Primes
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+ 7 . Reverse Integer
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+ 136 . Single Number
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+ 137 . Single Number ii
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+
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+ ##### ArraaysHash (Prefix sum)
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+
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+ ### Uni
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+ 303 . 724 . 304 . 1314 . 268 . 287 . 189 . 674 .
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+ ### Jandex
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+ 560 .
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+ ### Oz
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+ 896 .
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+
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+ ##### ArraaysHash
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+
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+ 1 . Sum
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+ 36 . Valid Sudoku
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+ 205 . Isomorphic Strings
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+ 356 . Line reflection
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+ 146 . Lru Cache
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+ 2657 . Find the Prefix Common
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+
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+ ##### TwoPointers
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+
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+ 977 . Squares of a sorted Array
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+ 283 . Move Zeroes
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+ 125 . Valid Palendrom
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+ 167 . Two Integer Sum II
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+ 161 . One Edit Distance
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+
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+ ##### SlidingWindow
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+
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+ 228 . Summary Ranges
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+ 485 . Max Consecutive Ones
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+ 3 . Longest...
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+ 849 . Maximize Distance to closest person
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+ 443 . String Compression
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+
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+ ##### Linked list
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+
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+ ### Сбебс
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+ 19 . Remove Nth Node from End of List
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+ 143 . Reorder List
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+ 23 . Merge k Sorted Lists
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+ ### Jandex
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+ 206 . Reverse Linked List
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+ 234 . Palindrome Linked List
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+ ### Uni
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+ 876 . Middle of the Linked List
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+ 143 . Reorder List
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+
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+ ##### Binary Search
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+
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+ 704 . Binary Search
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+ 852 . Peak Index in a Mountain Array
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+ 33 . Search in Rotated Sorted Array
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+ 34 . Find First and Last Position of Element in Sorted Array
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+ 74 . Search a 2D Matrix
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+ 69 . Sqrt(x)
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+ 658 . Find K Closesest Elements
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- ### Ru companies
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+ ##### Stack, Queue
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+
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+ 20 . Valid Parentheses
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+ 1249 . Minimum Remove to Make Valid Parentheses
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+ 739 . Daily Temperatures
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+ 912 . Sort an Array
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+
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+ ##### Binare Tree
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+
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+ ### Uni
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+ 144 .
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+ 199 . Binary Tree Right Side View
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+ ### Jandex
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+ 102 . Binary Tree Level Order Traversal
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+ * 101 . Symmetric Tree
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+ 100 . Same Tree
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+ 112 . Path sum
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+
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+ ##### Heap
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+
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+ 215 . Kth Largest Element in an Array
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+ 347 . Top K Frequent Elements (не отсортирован)
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+ 912 . Sort an Array
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+
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+ ##### Intervals
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+
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+ ### Uni
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+ 56 . Merge Intervals
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+ 252 . Meeting Rooms
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+ 1094 . Car pooling
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+ 452 . Minimum Number of Arrows to Burst Balloons
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+ 347 . Top K Frequent Elements (не отсортирован)
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+ ### Avi
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+ 2 . Add Two Numbers
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+
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+ ##### Graphs
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+
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+ 62 . Unique paths
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+ 63 . Unique paths ii
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+ 64 . Minimum Path Sum
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+ 200 . Number of Islands
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+ 207 . Course Schedule
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+ 210 . Course Schedule ii
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+ 130 . Surronded Regions
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+ 695 . Max Area of Island
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+ 1091 . Shortest path in Binary Matrix
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+
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+ ##### Backtracking
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+
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+ 17 . letter combinations of a phone number
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+ 46 . Permatations
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+ 51 . N-Queens
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+ 22 . Generate Parentheses
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