diff --git a/.common/cpp/skeleton.cpp b/.common/cpp/skeleton.cpp
index 01588ab..ec251ce 100644
--- a/.common/cpp/skeleton.cpp
+++ b/.common/cpp/skeleton.cpp
@@ -258,6 +258,10 @@ inline void no() { std::cout << "NO\n"; }
 inline void yesno(bool ans) { std::cout << (ans ? "YES" : "NO") << "\n"; }
 #pragma endregion /* output */
 
+#pragma region rng
+std::mt19937 rng(std::chrono::steady_clock::now().time_since_epoch().count());
+#pragma endregion /* rng */
+
 #pragma endregion /* helpers */
 
 // for ‹N› test cases, uncomment for single test case