Cod sursa(job #76101)
| Utilizator |  Ioan Pamfil pamfil |
Data | 7 august 2007 22:53:25 |
|---|---|---|---|
| Problema | Factorial | Scor | 35 |
| 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);
do
{
n++;
n5=n;
while(!(n5%5)){
p5++;
n5=n5/5;
}
}while (p5<p);
n=((!p)?1:n);
f=fopen("fact.out","w");
if (p5==p)
fprintf(f,"%d",n);
else
fprintf(f,"-1");
fclose(f);
return 0;
}