Cod sursa(job #76106)

Utilizator pamfilIoan Pamfil pamfil Data 7 august 2007 23:09:01
Problema Factorial Scor 35
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.35 kb
Raporteaza aceasta sursa 
#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",n);
else
	fprintf(f,"-1\n");
fclose(f);
return 0;
}