1. minimum-depth-of-binary-tree 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 nearest leaf node. 求二叉树的最小深度: 解题思路 递归遍历二叉树的每一个节点: (1)如果该节点为null,返回深度为0…
3. Longest Substring Without Repeating Characters Given a string, find the length of the longest substring without repeating characters. Examples: Given . Given . Given . Note that the answer must be a substring, "pwke" is a subsequence and not…