Cod sursa(job #76115)
| Utilizator |  Ioan Pamfil pamfil |
Data | 8 august 2007 00:05:15 |
|---|---|---|---|
| Problema | Factorial | Scor | 55 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.34 kb |
#include<stdio.h>
int main()
{
unsigned int p=0, p5=0, n=0, n5;
FILE *f;
f=fopen("fact.in", "r");
fscanf(f,"%d",&p);
fclose(f);
while(p5<p)
{
n+=5;
n5=n;
while(!(n5%5)){
p5++;
n5/=5;
}
}
n=((!p)?1:n);
f=fopen("fact.out","w");
if (p5==p)
fprintf(f,"%d\n",n);
else
fprintf(f,"-1\n");
fclose(f);
return 0;
}