Cod sursa(job #114285)
| Utilizator |  Hasna Robert coderninu |
Data | 13 decembrie 2007 17:55:43 |
|---|---|---|---|
| Problema | Factorial | Scor | 0 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.28 kb |
#include <stdio.h>
long p,n,i;
int main()
{
freopen("fact.in", "r", stdin);
scanf("%ld\n", &p);
fclose(stdin);
for (i=5; i<=p; i*=5) n+=p/i;
freopen("fact.out", "w", stdout);
if (!(p%(i/5))) printf("-1\n");
else printf("%ld\n", (p-n)*5);
fclose(stdout);
return 0;
}