import java.io.*;

public class CuadradoMagico
{
  private int [][] cm;
  private int n;

  public CuadradoMagico(int orden)
  {
    if (!esImpar(orden)) orden++;
    n = orden;
    cm = new int[n][n];
  }

  public boolean esImpar(int n)
  {
    if (n % 2 != 0) return true;
    return false;         
  }
  
  public void cuadradoMagico()
  {    
    int fil = 0, col = n/2, fil_ant = 0, col_ant = n/2, cont = 1, c = 0;
    PrintStream flujoS = System.out;
    char car = 0;
    
    cm[fil][col] = cont++;
                   
    while (cont <= n * n) 
    {   
      fil = fil-1;
      col = col+1;
           
      if(fil < 0) fil = n-1;
      if(col > n-1) col = 0;
      if(cm[fil][col] != 0)
      {
        col = col_ant; 
        fil = fil_ant + 1;
        if (fil == n) fil = 0;
      }
   
      cm[fil][col] = cont++;
      fil_ant = fil;
      col_ant = col;
    }
  }

  public void visualizar()
  {
    for (int i = 0; i < n;i++)
    {
      System.out.print("\t");
      for (int j = 0; j < n;j++)     
        System.out.print(cm[i][j] + "\t");
      System.out.println();
    }      
  }
}