Validate Binary Search Tree
Link to leetcode problem definition Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as…
226. Invert Binary Tree - June day 1
Inspiration of this problem comes from Max Howel's interview experience with Google described in this tweet. Lets jump to the problem The…
1448, Count Good Nodes in Binary Tree - BFS
Nice graph problem from leetcode biweekly contest. As majority of graph problems this one can be solved with Breadth First Search as well…