Cod sursa(job #855660)

Utilizator Stefanescu_MihaiStefanescu Mihai-Nicolae Stefanescu_Mihai Data 15 ianuarie 2013 13:59:02
Problema Factorial Scor 10
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.36 kb
Raporteaza aceasta sursa 
#include <fstream>
using namespace std;
int fiv(int n)
{
	int x=0;
	while (n!=1)
	{
		n/=5;
		x++;
	}
	return x;
}
int main()
{
	long long int n=0,p,x=0;
	ifstream f1("fact.in");
	ofstream f2("fact.out");
	f1>>p;
	if (p==0) f2<<"1";
	else
	{
		while (x<p)
		{	
			n+=5;
			x+=fiv(5);
		}
		if (x==p) f2<<n;
		else f2<<"-1";
	}
	return 0;
}