Card game

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <map>
#include <utility>
#include <set>

typedef long long LL;

using namespace std;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    LL n; cin >> n;
    vector<LL> v;
    for(int i = 0; i < n; i++){
        LL x; cin >> x; v.push_back(x);
    }
    sort(v.begin(), v.end());
    LL ans = 0;
    for(int i = v.size()-3; i >= 0; i -= 3){
        ans += v[i];
        ans += v[i+1];
    }
    cout << ans << endl;
}

Test 1

Verdict: UNKNOWN

Test 2

Verdict: UNKNOWN

Test 3

Verdict: UNKNOWN

Test 4

Verdict: UNKNOWN

Test 5

Verdict: UNKNOWN

Test 6

Verdict: UNKNOWN

Test 7

Verdict: UNKNOWN

Test 8

Verdict: UNKNOWN

Test 9

Verdict: UNKNOWN

Test 10

Verdict: UNKNOWN

Test 11

Verdict: UNKNOWN

Test 12

Verdict: UNKNOWN

Test 13

Verdict: UNKNOWN

Test 14

Verdict: UNKNOWN

Test 15

Verdict: UNKNOWN

Test 16

Verdict: UNKNOWN

Test 17

Verdict: UNKNOWN

Test 18

Verdict: UNKNOWN