# LeetCode 98. Validate Binary Search Tree

Description https://leetcode.com/problems/validate-binary-search-tree/ Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is…

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Description https://leetcode.com/problems/validate-binary-search-tree/ Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is…

Description Given a binary tree, return the level order traversal of its nodes’ values. (ie, from left to right, level by level).…

Description https://leetcode.com/problems/minimum-depth-of-binary-tree/description/ Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the…

Description https://leetcode.com/problems/balanced-binary-tree/description/ Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined…

Description Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest…

Description https://leetcode.com/problems/symmetric-tree/description/ Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For…

Description https://leetcode.com/problems/same-tree/description/ Given two binary trees, write a function to check if they are the same or not. Two binary…

Description https://leetcode.com/problems/binary-tree-preorder-traversal/description/ Given a binary tree, return the preorder traversal of its nodes’ values. For example: Given binary tree {1,#,2,3}, 1 \ 2…