Cod sursa(job #76033)
| Utilizator |  S Octav emy2704 |
Data | 7 august 2007 17:13:13 |
|---|---|---|---|
| Problema | Factorial | Scor | 10 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.36 kb |
#include<stdio.h>
int main()
{
unsigned int p=0, p2=0, p5=0, n=1;
FILE *f=NULL;
f=fopen("fact.in","r");
fscanf(f,"%d\n",&p);
fclose(f);
n=0;
while (p5<p){
n++;
p2=p2+((n%2)?0:1);
p5=p5+((n%5)?0:1);
}
f=fopen("fact.out","w");
n = ((!p)?-1:n);
if ((p2==p) && (p2==p5))
fprintf(f, "%d", n);
else
fprintf(f,"-1");
fclose(f);
return 0;
}