diff --git a/gen.hpp b/gen.hpp
new file mode 100644
index 0000000..ec5080e
--- /dev/null
+++ b/gen.hpp
@@ -0,0 +1,16 @@
+#pragma once
+#include <vector>
+#include <cstdlib>
+#include <ctime>
+
+using std::vector;
+
+vector<int> generate(int N, int M) {
+	srand((unsigned)time(0));
+
+	auto r = vector<int>(N, 0);
+	for(int n = 0; n < N; n++)
+		r[n] = rand()%M;
+
+	return r;
+}