Submission #3247845

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Source Code Expand

#include <iostream>
#include <set>
#include <vector>
#include <string>
#include <algorithm>
#include <iterator>
#include <map>
#include <utility>
#include <list>
#include <climits>
#include <bitset>
#include <numeric>

using namespace std;

#define rep(i, n) for(int i = 0; i < n; i++)
#define repi(i, n) for(auto i = (n).begin(); i != (n).end(); i++)
#define in_arr(type, a, n) copy_n(istream_iterator<type>(cin), n, (a).begin());
#define ll long long int

int main(){
    int n;
    cin >> n;
    vector<int> a(3 * n);
    in_arr(int, a, 3 * n);
    sort(a.begin(), a.end());
    ll sum = 0;
    rep(i, n){
        sum += a[3 * n - i * 2 - 2];
    }
    cout << sum << endl;
    return 0;
}

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