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Main.java
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Main.java
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package com.company;
class TreeNode {
int val;
TreeNode left;
TreeNode right;
TreeNode() {}
TreeNode(int val) { this.val = val; }
TreeNode(int val, TreeNode left, TreeNode right) {
this.val = val;
this.left = left;
this.right = right;
}
}
public class Main {
public static void main(String[] args) {
// write your code here
}
public boolean isBalanced(TreeNode root) {
if(root == null) return true;
if(Math.abs(dfs(root.left) - dfs(root.right)) > 1) return false;
return isBalanced(root.left) && isBalanced(root.right);
}
public int dfs(TreeNode node){
if(node == null) return 0;
int left = dfs(node.left);
int right = dfs(node.right);
return Math.max(left, right) + 1;
}
}