Cod sursa(job #1994719)

Utilizator AlexandruPaulSirbu Alex AlexandruPaul Data 25 iunie 2017 19:45:13
Problema Factorial Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.27 kb
Raporteaza aceasta sursa 
#include <iostream>
#include <fstream>

using namespace std;
ifstream f("fact.in");
ofstream l("fact.out");
long long p,n;

int main()
{
    cin>>p;
    n=5*p-p/6*5;
    p++;
    if (n==5*p-p/6*5)
        cout<<-1;
    else
        cout<<n;
    return 0;
}