Balanced Binary Tree

This solution need some house keeping, I think there are tons of other better ways to write it. Especially the returning -99999 part, I don’t like it although it works.

 

 


/**
 * Definition for binary tree
 * public class TreeNode {
 *     int val;
 *     TreeNode left;
 *     TreeNode right;
 *     TreeNode(int x) { val = x; }
 * }
 */
public class Solution {
    public boolean isBalanced(TreeNode root) {
        if (root == null) return true;
        
        int height = recursiveStep(root);
        if (height  1){
            return -99999;
        }
        
        return Math.max(heightLeft, heightRight) + 1;
    }
}
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