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  1. //Bai 13
  2.  
  3. #include<bits/stdc++.h>
  4. using namespace std;
  5. #define el "\n"
  6. #define ll long long
  7. #define ull unsigned long long
  8. #define se second
  9. #define fi first
  10. #define be begin()
  11. #define en end()
  12. #define Faster cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0);
  13. int n;
  14. void Run()
  15. {
  16.    cin >> n;
  17.    int dem = 1;
  18.    for(int i = 0; i < n; i++)
  19.    {
  20.        if(i % 2 == 0)
  21.         {
  22.             for(int j = 0; j < n; j++) cout << dem++ << " ";
  23.         }
  24.         else
  25.         {
  26.                dem += n - 1;
  27.                for(int j = 0; j < n; j++) cout << dem-- << " ";
  28.                dem += n + 1;
  29.         }
  30.        cout << el;
  31.    }
  32. }
  33. int main()
  34. {
  35.     Faster;
  36.     Run();
  37.     return 0;
  38. }
  39.  
  40.  
Success #stdin #stdout 0s 5284KB
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https://ideone.com/4l4XBv
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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