104. Maximum Depth of Binary Tree.java

/*
problem link : https://leetcode.com/problems/maximum-depth-of-binary-tree/
problem name: 104. Maximum Depth of Binary Tree
Status: Accepted.
Author : Mohand sakr.
** */

/**
 * Definition for a binary tree node.
 * public 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;
 *     }
 * }
 */
class Solution {
    public int maxDepth(TreeNode root) {
        
        if(root==null) return 0;
        
         
        
        return 1 + Math.max(maxDepth(root.left),maxDepth(root.right));
    }
}