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Feb 24th, 2018
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  1. #include <fstream>
  2. #include <algorithm>
  3. using namespace std;
  4.  
  5. ifstream fin ("balcon.in");
  6. ofstream fout ("balcon.out");
  7.  
  8. int b[2505], a[52][52], n, i, j, nr, x, li, ls, k;
  9. int main()
  10. {
  11. fin >> n;
  12. for(i=1; i<=n*n; i++)
  13. fin >> b[i];
  14. sort(b+1, b+n*n+1);
  15.  
  16. nr = (n+1)/2;
  17. li = 1;
  18. ls = n;
  19. x = 1;
  20. for(k=1; k<=nr; k++)
  21. {
  22. for(j=li; j<=ls; j++)
  23. a[li][j] = b[x++];
  24.  
  25. for(i=li+1; i<=ls; i++)
  26. a[i][ls] = b[x++];
  27.  
  28. for(j=ls-1; j>=li; j--)
  29. a[ls][j] = b[x++];
  30.  
  31. for(i=ls-1; i>=li+1; i--)
  32. a[i][li] = b[x++];
  33. li ++;
  34. ls--;
  35. }
  36. for(i=1; i<=n; i++)
  37. {
  38. for(j=1; j<=n; j++)
  39. fout << a[i][j] << " ";
  40. fout << endl;
  41. }
  42.  
  43. return 0;
  44. }
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