fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6. 	int t;
  7. 	cin>>t;
  8. 	vector<int> arr(30);
  9. 	while(t--){
  10. 		int n;
  11. 		cin>>n;
  12. 		for(int i=0;i<n;i++) cin>>arr[i];
  13. 		int count = 0;
  14. 		bool pos = true;
  15. 		for(int i=n-2;i>=0;i--){
  16. 			while(arr[i] >= arr[i+1]){
  17. 				if(arr[i] == 0){
  18. 					pos = false;
  19. 					break;
  20. 				}
  21. 				count++;
  22. 				arr[i] /= 2;
  23. 			}
  24. 		}
  25.  
  26. 		if(pos) cout<<count<<"\n";
  27. 		else cout<<-1<<"\n";
  28.  
  29. 	}
  30. 	return 0;
  31. }
Success #stdin #stdout 0s 5324KB
comments (?)
stdin
copy 
7
3
3 6 5
4
5 3 2 1
5
1 2 3 4 5
1
1000000000
4
2 8 7 5
5
8 26 5 21 10
2
5 14
stdout
copy 
2
-1
0
0
4
11
0
https://ideone.com/eiEOXN
language:
C++ (gcc 8.3)
created:
14 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!