Estimated Time

using namespace chrono;
int rand(int l, int r){
	static mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	uniform_int_distribution<int> uid(l, r); return uid(rng);
}
auto start1 = high_resolution_clock::now();
auto stop1 = high_resolution_clock::now();
cout << setw(20) << "Estimated Time: " << duration_cast<microseconds>(stop1 - start1).count() / 1000000.0    << " uS\n";