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  1. // بسم الله الرحمن الرحيم
  2.  
  3. #include <bits/stdc++.h>
  4. using namespace std;
  5.  
  6. template <typename T> ostream &operator<<(ostream &os, vector<T> &v) { for (auto &i : v) os << i << ' '; return os; }
  7. template <typename T> istream &operator>>(istream &is, vector<T> &v) { for (auto &i : v) is >> i; return is; } 
  8. #define endl        '\n'
  9. #define int         long long
  10. #define ull         unsigned long long
  11. #define pii         pair<int, int>
  12. #define vi          vector<int> 
  13. #define all(v)      v.begin(), v.end()
  14. #define allr(v)    v.rbegin(), v.rend()
  15. #define Num_of_Digits(n) ((int(log10(n)) + 1))
  16. mt19937_64 rnd(chrono::steady_clock::now().time_since_epoch().count());
  17. // rnd() -> generates a random number
  18.  
  19. #define ElgamalyHowaAmaly  ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr); cout << fixed << setprecision(10)
  20.  
  21.  
  22. void solve1()
  23. {
  24.     int n;  cin >> n;
  25.     if(n % 2 == 0) cout << -1 << endl;
  26.     else {
  27.         for(int i = n; i >= 1; --i) cout << i << ' ' ;
  28.         cout << endl;
  29.     }
  30. }
  31.  
  32. signed main(){
  33.  
  34.     ElgamalyHowaAmaly;
  35.  
  36.     int t = 1;
  37.     cin >> t;
  38.     for(int test = 1; test <= t; ++test)
  39.     {
  40.         solve1();
  41.     }
  42.     return 0;
  43. }
Success #stdin #stdout 0.01s 5320KB
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-1
https://ideone.com/0L26gK
language:
C++14 (clang 8.0)
created:
4 days ago
visibility:
public

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