Cod sursa(job #76114)

Utilizator pamfilIoan Pamfil pamfil Data 7 august 2007 23:55:30
Problema Factorial Scor 55
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+=5;
		n5=n;
		do{
			p5++;
			n5/=5;
		}while(!(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;
}