Cod sursa(job #313320)

Utilizator zurziczurzic zeljko zurzic Data 8 mai 2009 19:16:47
Problema Factorial Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.26 kb
Raporteaza aceasta sursa 
#include<stdio.h>
int main()
{unsigned long n;
freopen("factorial.in","r",stdin);
freopen("factorial.out","w",stdout);
scanf("%lu",&n);
if(n==0)
	printf("%lu","1");
else
	if(n%5==0)
		printf("%lu","-1");
	else
		printf("%lu",(n-(n/5))*5);
return 0;
}