Cod sursa(job #1488638)

Utilizator CodrinsahCotarlan Codrin Codrinsah Data 19 septembrie 2015 13:34:54
Problema Factorial Scor 15
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.35 kb
Raporteaza aceasta sursa 
#include <fstream>
using namespace std;
ifstream fi ("fact.in");
ofstream fo ("fact.out");
unsigned long long p,x,n,a,b;
int main()
{
    fi>>p;
    if (p==0) n=1;
    if (p==1) {p=0;n=0;}
    while (p>0)
    {
        n=n+5;
        x=n;
        while (x%5==0) {x=x/5;p--;}
    }
    if (p==0) fo<<n;
    else fo<<-1;
    return 0;
}