#include <stdio.h>
long P;

int main()
{
	freopen ("fact.in","r",stdin);  
	freopen ("fact.out","w",stdout);
	scanf("%ld",&P);  
	if (P == 0)
		printf("%ld\n",1);
	else
		printf("%ld\n",P * 5);
	return 0;
}