Create MaximumDepthOfTree.java

Author: harshithasudhakar

Binary Tree/MaximumDepthOfTree.java

@@ -0,0 +1,32 @@
+/**
+ * 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;
+ *     }
+ * }
+ */
+
+import java.util.*;
+class MaximumDepthOfTree {
+    public int maxDepth(TreeNode root) {
+        return postorder(root);
+    }
+
+    public static int postorder(TreeNode root){
+        if(root == null){
+            return 0;
+        }
+        
+        int leftDepth = postorder(root.left);
+        int rightDepth = postorder(root.right);
+        return 1+Math.max(leftDepth, rightDepth);
+    }
+}