Cod sursa(job #1527157)

Utilizator ducu34Albastroiu Radu Gabriel ducu34 Data 17 noiembrie 2015 21:30:09
Problema Zeap Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.25 kb
Raporteaza aceasta sursa 
#include <fstream>

using namespace std;
ifstream fin("suma.in");
ofstream fout("suma.out");
long long n,p,x;
int main()
{
    fin>>n>>p;
    n--;
    n=n%p;
    x=((n + 1)*n/2)%p + (((n + 1) * n)*(2 * n + 1)/6)%p;
    fout<<x%p;
    return 0;
}