判断两棵树是否相等 leecode

很简单  提交代码 https://oj.leetcode.com/problems/same-tree/

iven 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.

/**
 * 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;
        if(p.val==q.val)
        {
            return isSameTree(q.left,p.left)&&isSameTree(q.right,p.right);

        }
        else
        {
            return false;
        }

    }
}