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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int long long int
  4. const int MOD = 1000000007;
  5.  
  6. void init_code() {
  7. #ifndef ONLINE_JUDGE
  8.     freopen("input.txt", "r", stdin);
  9.     freopen("output.txt", "w", stdout);
  10. #endif
  11. }
  12.  
  13. int32_t main() {
  14.     //init_code();
  15.     int t;
  16.     cin >> t;
  17.     while (t--) {
  18.         int n;
  19.         cin>>n;
  20.         if(n<=4) {
  21.             cout<<-1<<"\n";
  22.         } else {
  23.             for(int i=1;i<=n;i=i+2) {
  24.                 if(i==5) {
  25.                     continue;
  26.                 } else {
  27.                     cout<<i<<" ";
  28.                 }
  29.             }
  30.              cout<<5<<" "<<4<<" ";
  31.             for(int i=2;i<=n;i=i+2) {
  32.                 if(i==4) {
  33.                     continue;
  34.                 } else {
  35.                     cout<<i<<" ";
  36.                 }
  37.             }
  38.             cout<<"\n";
  39.         }
  40.         //cout<<1<<" "<<n-2<<"\n";
  41.     }
  42.     return 0;
  43. }
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin 
2
3
6
stdout 
-1
1 3 5 4 2 6
https://ideone.com/9b9Gcl
language:
C++ (gcc 8.3)
created:
4 days ago
visibility:
public

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