#include <cstdlib>	// rand() and srand()
#include <ctime>	// time

using namespace std;
int main()
{
	// srand() initialises the random number generator.
	// time(0) returns the number of seconds since Jan 1 1970
	srand (time(0));

	// rand() returns a non-negative integer no less than RAND_MAX
	int a = rand(); 

	return 0;
}