_104.java

package com.fishercoder.solutions;

import com.fishercoder.common.classes.TreeNode;

/**
 * 104. Maximum Depth of Binary Tree
 * Given a binary tree, find its maximum depth.
 * The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node.
 */
public class _104 {

    public int maxDepth(TreeNode root) {
        if (root == null) return 0;
        return Math.max(maxDepth(root.left), maxDepth(root.right)) + 1;
    }

}