Cod sursa(job #76119)

Utilizator pamfilIoan Pamfil pamfil Data 8 august 2007 08:31:37
Problema Factorial Scor 55
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.34 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);
while(p5<p)
{
		n+=5;
		n5=n;
		while(n5%5==0){
			p5++;
			n5/=5;
		}
	}

n=(p?n:1);

f=fopen("fact.out","w");
if (p5==p)
	fprintf(f,"%d\n",n);
else
	fprintf(f,"-1\n");
fclose(f);
return 0;
}