@@ -338,15 +338,125 @@ Better order to solve problems
3383384 . 1617 (Count Subtrees With Max Distance Between Cities)
3393395 . 1125 (Smallest Sufficient Team)
340340
341- ### Prefix sum
342341
343- 303 .
344- 724 . 560 . 304 . 1314 . 268 .
345- 287 . 189 . 896 . 674 .
342+ ### Ru companies
346343
347- ### Tips && Trics
344+ ##### Anagramms, Math, Simple nums
348345
349- 102 . = 199.
350- 100 . = 101
346+ 242 . Valid Anagram
347+ 49 . Group Angagrams
348+ 204 . Count Primes
349+ 7 . Reverse Integer
350+ 136 . Single Number
351+ 137 . Single Number ii
352+
353+ ##### ArraaysHash (Prefix sum)
354+
355+ ### Uni
356+ 303 . 724 . 304 . 1314 . 268 . 287 . 189 . 674 .
357+ ### Jandex
358+ 560 .
359+ ### Oz
360+ 896 .
361+
362+ ##### ArraaysHash
363+
364+ 1 . Sum
365+ 36 . Valid Sudoku
366+ 205 . Isomorphic Strings
367+ 356 . Line reflection
368+ 146 . Lru Cache
369+ 2657 . Find the Prefix Common
370+
371+ ##### TwoPointers
372+
373+ 977 . Squares of a sorted Array
374+ 283 . Move Zeroes
375+ 125 . Valid Palendrom
376+ 167 . Two Integer Sum II
377+ 161 . One Edit Distance
378+
379+ ##### SlidingWindow
380+
381+ 228 . Summary Ranges
382+ 485 . Max Consecutive Ones
383+ 3 . Longest...
384+ 849 . Maximize Distance to closest person
385+ 443 . String Compression
386+
387+ ##### Linked list
388+
389+ ### Сбебс
390+ 19 . Remove Nth Node from End of List
391+ 143 . Reorder List
392+ 23 . Merge k Sorted Lists
393+ ### Jandex
394+ 206 . Reverse Linked List
395+ 234 . Palindrome Linked List
396+ ### Uni
397+ 876 . Middle of the Linked List
398+ 143 . Reorder List
399+
400+ ##### Binary Search
401+
402+ 704 . Binary Search
403+ 852 . Peak Index in a Mountain Array
404+ 33 . Search in Rotated Sorted Array
405+ 34 . Find First and Last Position of Element in Sorted Array
406+ 74 . Search a 2D Matrix
407+ 69 . Sqrt(x)
408+ 658 . Find K Closesest Elements
351409
352- ### Ru companies
410+ ##### Stack, Queue
411+
412+ 20 . Valid Parentheses
413+ 1249 . Minimum Remove to Make Valid Parentheses
414+ 739 . Daily Temperatures
415+ 912 . Sort an Array
416+
417+ ##### Binare Tree
418+
419+ ### Uni
420+ 144 .
421+ 199 . Binary Tree Right Side View
422+ ### Jandex
423+ 102 . Binary Tree Level Order Traversal
424+ * 101 . Symmetric Tree
425+ 100 . Same Tree
426+ 112 . Path sum
427+
428+ ##### Heap
429+
430+ 215 . Kth Largest Element in an Array
431+ 347 . Top K Frequent Elements (не отсортирован)
432+ 912 . Sort an Array
433+
434+ ##### Intervals
435+
436+ ### Uni
437+ 56 . Merge Intervals
438+ 252 . Meeting Rooms
439+ 1094 . Car pooling
440+ 452 . Minimum Number of Arrows to Burst Balloons
441+ 347 . Top K Frequent Elements (не отсортирован)
442+ ### Avi
443+ 2 . Add Two Numbers
444+
445+ ##### Graphs
446+
447+ 62 . Unique paths
448+ 63 . Unique paths ii
449+ 64 . Minimum Path Sum
450+ 200 . Number of Islands
451+ 207 . Course Schedule
452+ 210 . Course Schedule ii
453+ 130 . Surronded Regions
454+ 695 . Max Area of Island
455+ 1091 . Shortest path in Binary Matrix
456+
457+ ##### Backtracking
458+
459+ 17 . letter combinations of a phone number
460+ 46 . Permatations
461+ 51 . N-Queens
462+ 22 . Generate Parentheses
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