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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int main(){
  4. 	int t;
  5. 	cin>>t;
  6. 	while(t--){
  7. 		cout<<setprecision(6)<<fixed;
  8. 		int n;
  9. 		cin>>n;
  10. 		int a[n];
  11. 		for(int i=0;i<n;i++){
  12. 			cin>>a[i];
  13. 		}
  14. 		sort(a,a+n);
  15. 		double c=(a[n-1]+a[n-2])/2;
  16. 		for(int i=n-3;i>=0;i--){
  17. 			c=(c+a[i])/2;
  18. 		}
  19. 		cout<<c<<endl;
  20. 	}
  21. }
Success #stdin #stdout 0s 4372KB
comments (?)
stdin
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2
2
9 3
3
3 2 9
stdout
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6.000000
4.000000
https://ideone.com/sSgn1C
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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