标签:public code off null roo root max mat init
利用上一题求深度的做法
/**
 * Definition for a binary tree node.
 * public class TreeNode {
 *     int val;
 *     TreeNode left;
 *     TreeNode right;
 *     TreeNode(int x) { val = x; }
 * }
 */
class Solution {
    Boolean res = true;
    public boolean isBalanced(TreeNode root) {
        dfs(root);
        return res;
    }
    int dfs(TreeNode root){
        if(root == null) return 0;
        int left = dfs(root.left);
        int right = dfs(root.right);
        if(Math.abs(left-right) > 1) res = false;
        return Math.max(left, right) + 1;
    }
}
标签:public code off null roo root max mat init
原文地址:https://www.cnblogs.com/vccyb/p/14648060.html