LeetCode tasks for Yandex Status # Title Difficulty Solution ☑ 228 summary ranges Easy here ☑ 443 string compression Medium here ☑ 206 reverse linked list Easy here ☑ 22 [DONE] generate parentheses Medium here ☑ 146 lru cache Medium here ☑ 283 move zeroes Easy here ☑ 125 valid palindrome Easy here ☑ 49 [DONE] group anagrams Medium here ☑ 1493 longest subarray Medium here ☑ 20 valid parentheses Easy here ☑ 560 subarray sum equals k Medium here ☑ 380 insert delete getrandom o1 Medium here ☑ 1 [DONE] two sum Easy here ☑ 23 merge k sorted lists Hard here ☑ 567 permutation in string Medium here ☑ 56 merge intervals Medium here ☑ 933 number of recent calls Easy here ☑ 98 validate binary search tree Medium here ☑ 232 implement queue using stacks Easy here ☑ 59 [DONE] spiral matrix ii Medium here ☑ 1004 max consecutive ones iii Medium here ☑ 42 trapping rain water Hard here ☑ 3 longest substring without repeating characters Medium here ☑ 2 add two numbers Medium here ☑ 21 merge two sorted lists Easy here ☑ 88 [DONE] merge sorted array Easy here ☑ 101 symmetric tree Easy here ☑ 268 [DONE] missing number Easy here ☑ 48 rotate image Medium here ☑ 5 longest palindromic substring Medium here ☑ 332 reconstruct itinerary Medium here ☑ 658 find k closest elements Medium here ☑ 200 number of islands Medium here ☑ 392 [DONE] is subsequence Easy here ☑ 849 maximize distance to closest person Medium here ☑ 4 median of two sorted arrays Hard here ☑ 974 subarray sums divisible by k Medium here ☑ 33 search in rotated sorted array Medium here ☑ 449 serialize and deserialize bst Medium here ☑ 977 [DONE] squares of a sorted array Easy here ☑ 350 intersection of two arrays ii Easy here ☑ 19 remove nth node from end of list Medium here ☑ 85 maximal rectangle Hard here ☑ 34 find first and last position of element in sorted array Medium here ☑ 150 evaluate reverse polish notation Medium here ☑ 279 perfect squares Medium here ☑ 28 [DONE] implement strstr Easy here ☑ 238 product of array except self Medium here ☑ 71 simplify path Medium here ☑ 234 palindrome linked list Easy here LeetCode tasks for practice Status # Title Difficulty Solution ☐ 7 Reverse Integer Easy here