fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. void solve()
  5. {
  6.     int n;
  7.     cin >> n;
  8.  
  9.     int ans = n/2 + n % 2;
  10.  
  11.     int i = 1, j = 3*n;
  12.     int cnt = ans;
  13.  
  14.     cout << ans << endl;
  15.  
  16.     while(cnt --)
  17.     {
  18.         cout << i << " " << j << endl;
  19.         i += 3;
  20.         j -= 3;
  21.     }
  22. }
  23.  
  24. int main() {
  25.     // your code goes here
  26.     int t;
  27.     cin >> t;
  28.  
  29.     while(t--)
  30.         solve();
  31.  
  32. }
Success #stdin #stdout 0s 5324KB
comments (?)
stdin
copy 
2
1
2
stdout
copy 
1
1 3
1
1 6
https://ideone.com/NHJSqR
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!