Cod sursa(job #674835)

Utilizator Andrei.XweCobzaru Adrian-Andrei Andrei.Xwe Data 6 februarie 2012 19:54:26
Problema Factorial Scor 15
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.33 kb
Raporteaza aceasta sursa 
using namespace std;
#include<fstream>
int main()
{
	long long p;
	ifstream fcin("fact.in");
	ofstream fcout("fact.out");
	fcin>>p;
	if (p<0)
		fcout<<-1;
	else
		if (p==0)
			fcout<<1;
		else
		{
			long long asa=5*p;
			for(long long i=25;i<=5*p;i*=25)
				asa=asa-(asa/i-1)*5;
			fcout<<asa;
		}
	return 0;
}