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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. int t;
  6. cin>>t;
  7. while(t--){
  8. int n;
  9. cin>>n;
  10. if(n%2!=0){
  11. int b[n+1]={0};
  12. for(int i=1;i<=n;i++){
  13. b[i]=i-1;
  14. }
  15. b[1]=n;
  16. for(int i=1;i<=n;i++){
  17. cout<<b[i]<<" ";
  18. }
  19. }else{
  20. cout<<"-1";
  21. }
  22. cout<<"\n";
  23. }
  24.  
  25.  
  26. 	// your code goes here
  27. 	return 0;
  28. }
Success #stdin #stdout 0.01s 5292KB
comments (?)
stdin
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4
2
3
4
5
stdout
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-1
3 1 2 
-1
5 1 2 3 4
https://ideone.com/BAUrt0
language:
C++14 (gcc 8.3)
created:
10 days ago
visibility:
public

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