s0104

include/s0104_maximum_depth_of_binary_tree.hpp

@@ -0,0 +1,15 @@
+#ifndef S0104_MAXIMUM_DEPTH_OF_BINARY_TREE_HPP
+#define S0104_MAXIMUM_DEPTH_OF_BINARY_TREE_HPP
+
+#include <algorithm>
+
+#include "structures.hpp"
+
+using namespace std;
+
+class S0104 {
+ public:
+  int maxDepth(TreeNode* root);
+};
+
+#endif

src/s0104_maximum_depth_of_binary_tree.cpp

@@ -0,0 +1,6 @@
+#include "s0104_maximum_depth_of_binary_tree.hpp"
+
+int S0104::maxDepth(TreeNode* root) {
+  if (root == nullptr) return 0;
+  return max(maxDepth(root->left), maxDepth(root->right)) + 1;
+}