#include <stdio.h>

int main()
{
	long int p;
	int x = 1;
	FILE *in, *out;
	in = fopen("fact.in","r");
	fscanf(in,"%ld",&p);
	fclose(in);
	out = fopen("fact.out","w");
	if(p==0)fprintf(out,"%ld",x);
	else fprintf(out,"%ld",5*p);
	fclose(out);
	return 0;
}