#include <stdio.h>

/*
 * Create and return a dx by dy transformation martix.
 */

int *xform(dx, dy)
int dx, dy;
{
  register int *mat = (int *)calloc(dx*dy, sizeof(int));
  register int dx2 = dx+dx, dy2 = dy+dy;
  register int i, j, x;
  int perm;
  
  for (perm=0; perm<dx; perm++) {
    i=perm+perm; j=0;
    for (x=0; x<dx; x++)
      if ((i-=dy2) < 0) {
	i+=dx2;
	mat[x*dy + j++]++;
	if (j==dx) j--;
      }
  }
  return(mat);
}

main()
{
  int dx, dy, x, y;
  int *mat;

  while (1) {
    printf("dx dy ? ");

    if (scanf("%d%d", &dx, &dy) < 0)
      exit(0);

    mat=xform(dx, dy);

    printf("\n");
    for (y=0; y<dy; y++) {
      for (x=0; x<dx; x++)
	printf("%3d", mat[x*dy + y]);
      printf("\n");
    }
  }
}