题目如下： Given two binary trees, write a function to check if they are the same or not. Two binary trees are considered the same if they are structurally identical and the nodes have the same value. Leet… 阅读全文
分类： 算法
[LeetCode每日一题]99. Recover Binary Search Tree
题目如下: Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. LeetCode-99 Recover Binary Search Tree 该题给定一棵二叉搜索树，树中正好有两个元素放反了，要求我们恢复这棵二叉搜索树。… 阅读全文
LeetCode-1 Two Sum 解析
题目: 给定一个整数数组 nums 和一个目标值 target，请你在该数组中找出和为目标值的那 两个 整数，并返回他们的数组下标。 你可以假设每种输入只会对应一个答案。但是，你不能重复利用这个数组中同样的元素。 示例: [go]给定 nums = [2, 7, 11, 15], target = 9 因为 nums[0] + nums[1] = 2 + 7 = 9 所以返回 [0, 1][/go… 阅读全文