题目介绍

解法

采用递归的思想

class Solution {
    public boolean isSameTree(TreeNode p, TreeNode q) {
        if(p == null || q == null){
            return p == q; // 必须都是 null才返回true
        }
        return p.val == q.val && isSameTree(p.left, q.left) && isSameTree(p.right, q.right);
    }
}