// generate test input for sorting
// assume size of output is in command line.
import java.util.*;

public class Generate
{
  public static void main(String [] args)
  {
    int n = Integer.parseInt(args[0]);
    Random gen = new Random();
    int [] a = new int [n];

    int num;

    for (int i = 0; i < n; ++i)
    {
      // generate a random number (1..n), and make sure not duplicate

      boolean found = false;

      do
      {
        num = gen.nextInt(n) + 1;

	found = false;                      // don't forget!
        for (int j = 0; j < i; ++j)
        {
	  if (a[j] == num)
  	    found = true;
        }

      } while(found);

      // and now put in array!
      a[i] = num;
    }

    for (int i = 0; i < n; ++i)
      System.out.print(a[i] + " ");
    System.out.println();
  }
}