Cod sursa(job #1268915)

Utilizator Denisa13Stefan Denisa Denisa13 Data 21 noiembrie 2014 17:33:20
Problema Factorial Scor 10
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.34 kb
Raporteaza aceasta sursa 
#include <iostream>
#include <fstream>

using namespace std;

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

int main()
{
    long p,q;
    f>>p;
    q=p/5;
    q=q*5+q-1;
    if(p==q)
        g<<-1;
    else {
    if(p%5==0)
        g<<p*5-(p/5-1)*5;
    else g<<p*5-(p/5)*5;}
    f.close();
    g.close();
    return 0;
}