#include<stdio.h>
 
int main()
{
  int n, c, d, num = 1, space;
  printf("Number of rows: ");
  scanf("%d",&n);
 
  space = n - 1;
 
  for ( d = 1 ; d <= n ; d++ )
    {
      num = d;
 
      for ( c = 1 ; c <= space ; c++ )
	printf(" ");
 
      space--;
 
      for ( c = 1 ; c <= d ; c++ )
	{
	  printf("%d", num);
	  num++;
	}
      num--;
      num--;
      for ( c = 1 ; c < d ; c++)
	{
	  printf("%d", num);
	  num--;
	}
      printf("\n");
 
    }
 
  return 0;
}