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100.相同的树.js
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100.相同的树.js
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/*
* @lc app=leetcode.cn id=100 lang=javascript
*
* [100] 相同的树
*
* https://leetcode.cn/problems/same-tree/description/
*
* algorithms
* Easy (59.75%)
* Likes: 844
* Dislikes: 0
* Total Accepted: 344.4K
* Total Submissions: 576.2K
* Testcase Example: '[1,2,3]\n[1,2,3]'
*
* 给你两棵二叉树的根节点 p 和 q ,编写一个函数来检验这两棵树是否相同。
*
* 如果两个树在结构上相同,并且节点具有相同的值,则认为它们是相同的。
*
*
*
* 示例 1:
*
*
* 输入:p = [1,2,3], q = [1,2,3]
* 输出:true
*
*
* 示例 2:
*
*
* 输入:p = [1,2], q = [1,null,2]
* 输出:false
*
*
* 示例 3:
*
*
* 输入:p = [1,2,1], q = [1,1,2]
* 输出:false
*
*
*
*
* 提示:
*
*
* 两棵树上的节点数目都在范围 [0, 100] 内
* -10^4
*
*
*/
// @lc code=start
/**
* Definition for a binary tree node.
* function TreeNode(val, left, right) {
* this.val = (val===undefined ? 0 : val)
* this.left = (left===undefined ? null : left)
* this.right = (right===undefined ? null : right)
* }
*/
/**
* @param {TreeNode} p
* @param {TreeNode} q
* @return {boolean}
*/
var isSameTree = function (p, q) {
if (p === null && q === null) return true;
if (p === null || q === null) return false;
if (p.val !== q.val) return false;
return isSameTree(p.left, q.left) && isSameTree(p.right, q.right);
};
// @lc code=end