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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- int t,n,i,j,k,l,a[20000+5],b,c,d;
- cin>>t;
- while(t--)
- {
- d=0;
- cin>>n;
- for(i=0;i<n;i++)
- cin>>a[i];
- sort(a,a+n,greater<int>());
- for(i=2;i<n;i+=3)
- {
- d+=a[i];
- }
- cout<<d<<endl;
- }
- return 0;
- }
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