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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long 
  4.  
  5. int main(){
  6. 	int t;
  7. 	cin>>t;
  8.  
  9. 	while(t--){
  10. 		int n;
  11. 		cin>>n;
  12.  
  13. 		if(n<=2){
  14. 			cout<<0<<endl;
  15. 		}else if(n==3){
  16. 			cout<<1<<endl;
  17. 		}else{
  18. 			n-=2;
  19.  
  20. 			cout<<n/2<<endl;
  21. 		}
  22. 	}
  23. }
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin 
3
8
4
3
stdout 
3
1
1
https://ideone.com/aISLGN
language:
C++14 (gcc 8.3)
created:
4 days ago
visibility:
public

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