diff --git a/gen.cpp b/gen.cpp
index 8f787f6..6b603c7 100644
--- a/gen.cpp
+++ b/gen.cpp
@@ -1,10 +1,13 @@
 #include "global.hpp"
 #include <cstdlib>
 #include <ctime>
+#include <chrono>
+
+using namespace std::chrono;
 
 
 vector<int> generate(int N, int M) {
-	srand((unsigned)time(0));
+	srand(duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count());
 
 	auto r = vector<int>(N, 0);
 	for(int n = 0; n < N; n++)