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.
判断两棵二叉树是否相同
java代码:
/**
* Definition for a binary tree node.
* public class TreeNode {
* int val;
* TreeNode left;
* TreeNode right;
* TreeNode(int x) { val = x; }
* }
*/
public class Solution {
public boolean isSameTree(TreeNode p, TreeNode q) {
if(p==null&&q==null)return true;
if(p==null||q==null)return false;
if(p.val==q.val){
return isSameTree(p.left,q.left)&&isSameTree(p.right,q.right);
}
return false;
}
}
原文：http://www.cnblogs.com/lcbg/p/6613765.html