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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4. typedef long long ll;
  5. int main()
  6. {
  7. #ifndef ONLINE_JUDGE
  8. 	freopen("input.txt", "r", stdin);
  9. 	freopen("output.txt", "w", stdout);
  10. #endif
  11.  
  12. 	ll t;
  13. 	cin >> t;
  14. 	while (t--)
  15. 	{
  16. 		ll a;
  17. 		cin >> a;
  18. 		if (a != 0 && (a & (a - 1)) == 0)
  19. 		{
  20. 			cout << -1 <<endl;
  21. 			continue;
  22.  
  23. 		}
  24. 		else if (a == 1)
  25. 		{
  26. 			cout << 1 <<endl;
  27. 			continue;
  28. 		}
  29. 		else if (a==3)
  30. 		{
  31. 		    cout << 2 << " " << 3 << " " << 1 <<endl;
  32. 		    continue;
  33. 		}
  34. 		else if (a==5)
  35. 		{
  36. 		    cout << 2 << " " << 3 << " " << 1 << " "<<5<<" "<<4 <<endl;
  37. 		    continue;
  38. 		}
  39. 		else
  40. 		{
  41. 		    cout << 2 << " " << 3 << " " << 1 << " "<<5<<" "<<4<<endl;
  42. 			ll i=6;
  43. 			while(i<=a)
  44. 			{
  45. 				if ( i != 0 && (i & (i - 1)) == 0)
  46. 				{
  47. 					 cout << i + 1 << " " << i << " ";
  48.                     i += 2;
  49. 				}
  50. 				else
  51. 				{
  52. 					cout << i << " ";
  53.                     i++;
  54. 				}
  55. 			}
  56. 		}
  57. 		cout << endl;
  58.  
  59.  
  60. 	}
  61. }
  62.  
Success #stdin #stdout 0s 4244KB
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https://ideone.com/Y3grUf
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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