/* sierpinski0.c - Don Yang (uguu.org)

   01/07/07
                                                                           */

#include<stdio.h>

int main(void)
{
   int cell[79];
   int x, y, left, current;
   for(x = 0; x < 79; cell[x++] = (x == 34));
   for(y = 0; y < 32; y++)
   {
      for(x = left = 0; x < 78; x++)
      {
         current = cell[x];
         cell[x] = left ^ cell[x + 1];
         putchar(" A"[left = current]);
      }
      putchar('\n');
   }
   return 0;
}