Cod sursa(job #1515584)

Utilizator FairPlay94George Cioroiu FairPlay94 Data 1 noiembrie 2015 21:17:35
Problema Sum Scor 85
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.79 kb
#include <cstdio>
#include <iostream>
#include <set>
#include <climits>
#include <map>
#include <algorithm>
#include <list>
#include <vector>
#include <utility>

using namespace std;

int main() {
    freopen("sum.in", "r", stdin);
    freopen("sum.out", "w", stdout);

    ios::sync_with_stdio(false);
    cin.tie(0);

    int n, fi[100005];
    for (int i = 1; i <= 100000; i++) {
        fi[i] = i;
    }
    for (int i = 2; i <= 100000; i++) {
        if (fi[i] == i) {
            for (int j = i; j <= 100000; j += i) {
                fi[j] /= i;
                fi[j] *= i - 1;
            }
        }
    }
    cin >> n;
    for (int tt = 1; tt <= n; tt++ ) {
        long long x;
        cin >> x;
        cout << 2 * x * fi[x] << "\n";
    }

    return 0;
}