Leetcode tasks
- [09] Merge k sorted lists
- [10] Search in rotated sorted array
- [13] Group anagrams
- [14] Maximum subarray
- [17] Merge intervals
- [18] Insert intervals
- [23] Word search
- [24] Decode ways
- [29] Construct Binary Tree from Preorder and Inorder Traversal
- [30] Best Time to Buy and Sell Stock
- [31] Binary Tree Maximum Path Sum
- [32] Valid Palindrome