【[Leetcode 101]判断对称树 Symmetric Tree】的更多相关文章

[Leetcode 101]判断对称树 Symmetric Tree

[题目] Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree [1,2,2,3,4,4,3] is symmetric: 1 / \ 2 2 / \ / \ 3 4 4 3 But the following [1,2,2,null,3,null,3] is not: 1 / \ 2 2 \ \ 3…

LeetCode 101. Symmetric Tree 判断对称树 C++

Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree [1,2,2,3,4,4,3] is symmetric: 1 / \ 2 2 / \ / \ 3 4 4 3 But the following [1,2,2,null,3,null,3] is not: / \ \ \ Note:Bonus po…

[LeetCode] Symmetric Tree 判断对称树

Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree is symmetric: 1 / \ 2 2 / \ / \ 3 4 4 3 But the following is not: 1 / \ 2 2 \ \ 3 3 Note:Bonus points if you could solve it b…

leetcode-101. 判断对称树 · Tree + 递归

题面 判断给定二叉树是否对称. Note : empty tree is valid. 算法 1. 根节点判空,若空,则返回true;(空树对称) 2. 根节点不空,递归判断左右子树.如果左右孩子都空,说明到了叶子,返回true;不都空而且一空一不空,返回false:都不空,且值不等,返回false,值相等,递归(左的左, 右的右) && (左的右, 右的左) 源码 /** * Definition for a binary tree node. * struct TreeNode { *…

[Swift]LeetCode101. 对称二叉树 | Symmetric Tree

Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree [1,2,2,3,4,4,3] is symmetric: 1 / \ 2 2 / \ / \ 3 4 4 3 But the following [1,2,2,null,3,null,3] is not: 1 / \ 2 2 \ \ 3 3 Not…

【Leetcode】【Easy】Symmetric Tree

Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree is symmetric: 1 / \ 2 2 / \ / \ 3 4 4 3 But the following is not: 1 / \ 2 2 \ \ 3 3 Note:Bonus points if you could solve it b…

LeetCode 100. 相同的树(Same Tree) 2

100. 相同的树 100. Same Tree 题目描述 给定两个二叉树,编写一个函数来检验它们是否相同. 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. 每日一算法2019/5/5Day 2LeetCode100. Same Tree Java 实现 class TreeNode { int val; TreeNode left; TreeNode right; TreeNode(int x) { val = x; } } public class Solution {…

[Leetcode 100]判断二叉树相同 Same Tree

[题目] 判断二叉树是否相同. [思路] check函数. p==null并且q==null,返回true;(两边完全匹配) p==null或q==null,返回false;(p.q其中一方更短) p.val==q.val,值相同,继续迭代向左向右遍历check(p.left,q.left)&&check(p.right,q.right); [代码] public boolean check(TreeNode p, TreeNode q){ if(p==null&&q==n…

LeetCode Same Tree （判断相同树）

题意:如题 思路:递归解决,同判断对称树的原理差不多.先保证当前两个结点是相等的,再递归保证两左结点是相等的,再递归保证右结点是相等的. /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */ class Sol…

[leetcode] 101. Symmetric Tree 对称树

题目大意 #!/usr/bin/env python # coding=utf-8 # Date: 2018-08-30 """ https://leetcode.com/problems/symmetric-tree/description/ 101. Symmetric Tree Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). Fo…