/**
* Definition for binary tree
* 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;
return p.val == q.val && isSameTree(p.left, q.left) && isSameTree(p.right, q.right);
}
}
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.
本文介绍了一种用于检查两棵二叉树是否等价的方法。等价的定义为两棵树不仅结构相同,而且每个节点的值也相同。提供了一个名为Solution的类,其中包含一个名为isSameTree的方法,该方法接受两个TreeNode类型的参数p和q,并返回一个布尔值,指示这两棵树是否等价。
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