enum CPU
{
	P1 = 1,
		P2,
		P3,
		P4
};
void main()
{
	unsigned int nCpu;
	scanf("%d", &nCpu);
	switch (nCpu)
	{
	case P1:
		printf("this is p1\n");
		break;
	case P2:
		printf("this is p2\n");
		break;
	case P3:
		printf("this is p3\n");
		break;
	case P4:
		printf("this is p4\n");
		break;
	default:
		printf("none\n");
		break;
	}
}