Validate Binary Search Tree Leetcode Solution
Given the root of a binary tree, determine if it is a valid binary search tree (BST). A valid BST is defined as follows: The left subtree of a node…
Count Complete Tree Nodes Leetcode Solution
Given the root of a complete binary tree, return the number of the nodes in the tree.According to Wikipedia, every level,except possibly the last, is completely
Find First and Last Position of Element in Sorted Array
Question 34. Find First and Last Position of Element in Sorted Array – Leetcode Javascript Solution Difficulty Medium Question Type Array Question Link https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/ Problem Description : Given an array of…