Cod sursa(job #1391033)

Utilizator EpictetStamatin Cristian Epictet Data 17 martie 2015 16:10:30
Problema 12-Perm Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.5 kb
#include <fstream>
using namespace std;
ifstream fin ("12perm.in");
ofstream fout ("12perm.out");
const int MOD = (1 << 20);
int N, a, b, c;;

int main()
{
    fin >> N;
    a = 2;
    b = 6;
    c = 12;
    for (int i = 5; i <= N; i++)
    {
        a = (c + a + ((i - 2) << 1)) % MOD;
        swap (a, c);
        swap (a, b);
    }

    if (N == 1) fout << "1\n";
    else if (N == 2) fout << a << '\n';
    else if (N == 3) fout << b << '\n';
    else fout << c << '\n';
    fout.close();
    return 0;
}