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  1. #include <iostream>
  2. #include<stdio.h>
  3. #include<string.h>
  4. #include<iostream>
  5. #include<bits/stdc++.h>
  6. using namespace std;
  7. void ravo(int a)
  8. {
  9.     int long long i;
  10.     for(i=2;i<=a;i+=2)
  11.     {
  12.         cout<<i<<" ";
  13.     }
  14.     for(i=1;i<=a;i+=2)
  15.     {
  16.         cout<<i<<" ";
  17.     }
  18.     cout<<endl;
  19. }
  20. void tavo(int a)
  21. {
  22.     int long long i;
  23.     for(i=2;i<=a;i+=2)
  24.     {
  25.         cout<<i<<" ";
  26.     }
  27.     for(i=1;i<=a;i+=2)
  28.     {
  29.         cout<<i<<" ";
  30.     }cout<<endl;
  31. }
  32.  
  33. int main() {
  34.     int n;
  35.     cin>>n;
  36.     for(int i=0;i<n;i++)
  37.     {
  38.         int a;
  39.         cin>>a;
  40.  
  41.         if(a<4)
  42.         {
  43.             cout<<"-1"<<endl;;
  44.  
  45.         }
  46.         if(a==4)
  47.         {
  48.             ravo(a);
  49.  
  50.         }if(a>4)
  51.         {
  52.             tavo(a);
  53.  
  54.         }
  55.     }cout<<endl;
  56. 	// your code goes here
  57. 	return 0;
  58. }
  59.  
Success #stdin #stdout 0.01s 5424KB
comments (?)
stdin
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2
2
6
stdout
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-1
2 4 6 1 3 5
https://ideone.com/jsPfa2
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

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