#include <bits/stdc++.h>
using namespace std;
int main() {
	int t;
	cin>>t;
	while(t--){
	    int n;
	    cin>>n;
	    vector<int> a(n);
	    for(int i=0;i<n;i++){
	        cin>>a[i];
	    }
	    sort(a.begin(),a.end(),greater<int>());
	    int savings = 0;
        for (int i = 2; i < n; i += 3) {
            savings += a[i];
        }

        cout << savings << endl;
	}
	return 0;
}

交易他

好主意👌🤣

換camthomas