Ispisivanje brojeva

/* Program koji ispisuje brojeve do n (n<=210) na ovakav način:

    1   3   4  10  11  21  22  36
    2   5   9  12  20  23  35
    6   8  13  19  24  34
    7  14  18  25  33
   15  17  26  32
   16  27  31
   28  30
   29                  */

#include <iostream>
#include <cmath>
using namespace std;

main()
{
      int n, a[210][210];

      cin >> n;

      for (int i=0; i<sqrt(n*2); i++)
      for (int j=0; j<sqrt(n*2); j++)
      a[i][j] = 0;

      a[0][0] = 1;

      for (int i=1; i<sqrt(n*2); i++)
          if (i%2==1)
          a[i][0] = a[i-1][0] + 1;
          else
          a[i][0] = a[i-1][0] + 4*(i/2);

      for (int i=1; i<sqrt(n*2); i++)
          if (i%2==1)
          a[0][i] = a[0][i-1] + i*2;
          else
          a[0][i] = a[0][i-1] + 1;

      for (int i=1; i<sqrt(n*2); i++)
      for (int j=1; j<sqrt(n*2); j++)
          a[i][j] = a[i-1][j-1] + (i+j)*2;


      for (int i=0; i<sqrt(n*2); i++)
      {
          for (int j=0; j<sqrt(n*2); j++)
          if  ((a[i][j] != 0)&&(i+j<sqrt(n*2))&&(a[i][j] <= n))
              if (a[i][j]<10)
              cout << "  " << a[i][j] << " ";
              else if (a[i][j]<100)
              cout << " " << a[i][j] << " ";
              else
              cout << a[i][j] << " ";
          cout << endl;
      }

      system ("PAUSE");
}