Cod sursa(job #737560)

Utilizator hrazvanHarsan Razvan hrazvan Data 19 aprilie 2012 17:47:35
Problema Factorial Scor 10
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.35 kb
Raporteaza aceasta sursa 
#include<fstream>
using namespace std;

int main()
{
	long n,i,ci,p=5,ii=1;
	ifstream f("fact.in");
	ofstream o("fact.out");
	f>>n;
	if(n==0)
	{
		o<<"1";
	}
	else
	{
		for(i=5;n>0;i+=5)
		{
			ci=i;
			if(i==p)
			{
				n-=ii;
				ii++;
				p*=5;
			}
			else
				n--;
		}
		if(n<0)
		{
			o<<"-1";
		}
		else
			o<<i-5;
	}
}