Line data    Source code

       1              : // Copyright (c) 2024 The Authors. All rights reserved.
       2              : //
       3              : // Licensed under the Apache License, Version 2.0 (the "License");
       4              : // you may not use this file except in compliance with the License.
       5              : // You may obtain a copy of the License at
       6              : //
       7              : //      https://www.apache.org/licenses/LICENSE-2.0
       8              : //
       9              : // Unless required by applicable law or agreed to in writing, software
      10              : // distributed under the License is distributed on an "AS IS" BASIS,
      11              : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12              : // See the License for the specific language governing permissions and
      13              : // limitations under the License.
      14              : 
      15              : // Authors: liubang (it.liubang@gmail.com)
      16              : 
      17              : #include <gtest/gtest.h>
      18              : 
      19              : #include "tree.h"
      20              : 
      21              : namespace {
      22              : class Solution {
      23              : public:
      24              :     using TreeNode = leetcode::tree::TreeNode;
      25           11 :     int maxDepth(TreeNode* root) {
      26           22 :         return root == nullptr ? 0 : std::max(maxDepth(root->left), maxDepth(root->right)) + 1;
      27              :     }
      28              : };
      29              : } // namespace
      30              : 
      31            4 : TEST(Leetcode, maximum_depth_of_binary_tree) {
      32              :     using TreeNode = leetcode::tree::TreeNode;
      33            1 :     Solution s;
      34              :     TreeNode* root =
      35            1 :         new TreeNode(3, new TreeNode(9), new TreeNode(20, new TreeNode(15), new TreeNode(7)));
      36              : 
      37            1 :     EXPECT_EQ(3, s.maxDepth(root));
      38            1 :     leetcode::tree::destroy(root);
      39            1 : }