leetcode 100. Same Tree
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题目内容
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.
题目分析
递归调用函数，依次逐个遍历每个结点。
/** * 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 false; return isSameTree(p.left,q.left)&&isSameTree(q.right,p.right); }} 0 0
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