Cod sursa(job #502536)

Utilizator eudummyEduard eudummy Data 19 noiembrie 2010 22:34:42
Problema Factorial Scor 10
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.32 kb
Raporteaza aceasta sursa 
#include <fstream>
using namespace std;

int main()
{
	long n,k=1,p=0;
	ifstream f ("fact.in");
	ofstream g ("fact.out");
	f>>n;
	int i=1;
	while (p<n)
	{
		k=i*k;
		while (k%10==0)
		{
			p++;
			k=k/10;
		}
		k=k%100;
		i++;
	}
	if (p==n)
		g<<--i;
	else
		g<<-1;
	f.close();
	g.close();
	return 0;
}