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Leetcode 100 Same Tree python

题目: Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value. class Solution(object): def isSameTree(self, p, q): if p == No…

LeetCode 100. Same Tree （判断树是否完全相同）

100. Same Tree 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. Example 1: Input: 1 1 / \ / \ 2 3 2 3 [1,2,3]…

leetcode 100. Same Tree、101. Symmetric Tree

100. Same Tree class Solution { public: bool isSameTree(TreeNode* p, TreeNode* q) { if(p == NULL && q == NULL) return true; else if(p == NULL || q == NULL) return false; if(p->val != q->val) return false; return isSameTree(p->left,q->l…

[LeetCode] 100. Same Tree 相同树

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. Example 1: Input: 1 1 / \ / \ 2 3 2 3 [1,2,3], [1,2,3] Outpu…

LeetCode 100. Same Tree （相同的树）

Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value.  题目标题:Tree 这道题目给了我们两个二叉树,让我们判断这两个二叉树是否一摸一样.利用preOrder 来遍历tree, 对于每…

[leetcode]Balanced Binary Tree @ Python

原题地址:http://oj.leetcode.com/problems/balanced-binary-tree/ 题意:判断一颗二叉树是否是平衡二叉树. 解题思路:在这道题里,平衡二叉树的定义是二叉树的任意节点的两颗子树之间的高度差小于等于1.这实际上是AVL树的定义.首先要写一个计算二叉树高度的函数,二叉树的高度定义为:树为空时,高度为0.然后递归求解:树的高度 = max(左子树高度,右子树高度)+1(根节点要算上).高度计算函数实现后,递归求解每个节点的左右子树的高度差,如果有大于1的…

leetcode 100. Same Tree

Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value. 给出两个二叉树,写一个方法判断两个二叉树是否相等, 如果两个二叉树相等,说明结构相同并且每个节点的值相同. 如果两个节点都为空,则说…

leetcode 100 Same Tree ----- java

Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value. 判断两棵树是否相同. 很简单.递归. /** * Definition for a binary tree node. * publ…

Java [Leetcode 100]Same Tree

题目描述: Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value. 解题思路: 递归调用比较左子树和右子树以及该节点. 代码描述: /** * Definition for a binar…

leetcode Invert Binary Tree python

# Definition for a binary tree node. # class TreeNode(object): # def __init__(self, x): # self.val = x # self.left = None # self.right = None class Solution(object): def invertTree(self, root): """ :type root: TreeNode :rtype: TreeNode &quo…