摘要： 题目描述： Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given 阅读全文

摘要： 题目描述： Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nea 阅读全文

摘要： 题目描述： Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined as: Example 1: Given the fol 阅读全文