Cod sursa(job #3360909)

Utilizator Barbu_DariusBarbu Darius Barbu_Darius Data 17 iulie 2026 15:34:52
Problema Sum Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.57 kb
#include <bits/stdc++.h>
using namespace std;
ifstream in("sum.in");
ofstream out("sum.out");
const int DIM = 100000;
int F[DIM + 1];
int main()
{
    int i,d,m;
    for ( i = 2; i <= DIM; i++){
        F[i] = i;
    }
    for (d = 2; d <= DIM; d++){
        if (F[d] == d)
        {
            for ( m = d; m <= DIM; m += d){
                F[m] = F[m] / d * (d - 1);
            }
        }
    }
    int n, x;
    in >> n;
    for (i = 1; i <= n; i++)
    {
        in >> x;
        out << (long long) F[x] * 2 * x << '\n';
    }
    return 0;
}