Cod sursa(job #642612)

Utilizator mlupseLupse-Turpan Mircea mlupse Data 1 decembrie 2011 20:04:17
Problema Factorial Scor 40
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.31 kb
Raporteaza aceasta sursa 



#include <fstream>
#include <iostream>

using namespace std;


int main()

{

ifstream f("fact.in");
ofstream g("fact.out");

unsigned long p,i,b,div5=0,n=1;
f>>p;
for(i=5; i<=2000000000 && p>div5; i+=5)
{
    b=i;n=i;
    while(b%5==0)
	{div5++;
	b=b/5;}
	}
if(div5==p)
	g<<n;
else
	g<<"-1\n";
}