Cod sursa(job #642616)

Utilizator StexanIarca Stefan Stexan Data 1 decembrie 2011 20:12:03
Problema Factorial Scor 40
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.3 kb
Raporteaza aceasta sursa 
using namespace std;
#include <fstream>
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";
}