diff --git a/codes/cpp/include/include.hpp b/codes/cpp/include/include.hpp
index 8e4a8070d..03bf9b503 100644
--- a/codes/cpp/include/include.hpp
+++ b/codes/cpp/include/include.hpp
@@ -17,6 +17,8 @@
 #include <unordered_set>
 #include <set>
 #include <random>
+#include <chrono>
+#include <algorithm>
 
 #include "ListNode.hpp"
 #include "TreeNode.hpp"