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  1. #include <iostream>
  2. using namespace std;
  3. #define long long int
  4. int main() {
  5. 	int t;
  6. 	cin>>t;
  7. 	while (t--){
  8. 		int n;
  9. 		cin>>n;
  10. 		if(n%2==0) cout<<n/2-1<<endl;
  11. 		else cout<<n/2<<endl;
  12. 	}
  13. 	return 0;
  14. }
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin
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6
7
1
2
3
2000000000
763243547
stdout
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3
0
0
1
999999999
381621773
https://ideone.com/UGhlQH
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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