Cod sursa(job #613592)

Utilizator DDeidaraSzasz Tamas Csaba DDeidara Data 1 octombrie 2011 13:26:21
Problema Factorial Scor 40
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.36 kb
Raporteaza aceasta sursa 
#include <fstream>

using namespace std;

int main()
{
	unsigned long p,n=0,i=5,j;
	ifstream f("fact.in");
	ofstream g("fact.out");
	
	f>>p;
	f.close ();
	
	if (p==0)
		g<<"1";
	else
	{
		while (n<p)
		{
			j=i;
			while (!(j%5))
			{
				n++;
				j=j/5;
			}
			i=i+5;
		}
		
		if (n==p)
			g<<i-5;
		else
			g<<"-1";
	}
	
	return 0;
}