#include <stdio.h>
#include <stdlib.h>

extern const char *__progname;

static int mag;
static int cells;
static int r2c;

static int pixels;
static int r2p;

int main(int, char **);
int main(int ac, char **av)
{
 int cx;
 int cy;
 int mx;
 int my;
 int px;
 int py;
 int r;
 int g;
 int b;
 int dxc;
 int dyc;
 int dxp;
 int dyp;
 int dc;
 int dp;

 if (ac != 4)
  { fprintf(stderr,"Usage; %s mag squaresize radius-squared\n",__progname);
    exit(1);
  }
 mag = atoi(av[1]);
 cells = atoi(av[2]);
 r2c = atoi(av[3]);
 pixels = mag * cells;
 printf("P6\n%d %d\n255\n",pixels,pixels);
 r2p = r2c * mag * mag;
 for (cy=0;cy<cells;cy++)
  { dyc = (cy * 2) - (cells - 1);
    for (my=0;my<mag;my++)
     { py = my + (cy * mag);
       dyp = (py * 2) - (pixels - 1);
       for (cx=0;cx<cells;cx++)
	{ dxc = (cx * 2) - (cells - 1);
	  for (mx=0;mx<mag;mx++)
	   { px = mx + (cx * mag);
	     dxp = (px * 2) - (pixels - 1);
	     b = ( (mx == 0) || (mx == mag-1) ||
		   (my == 0) || (my == mag-1) ) ? 255 : 0;
	     dc = (dxc * dxc) + (dyc * dyc);
	     g = (dc <= r2c) ? 255 : 0;
	     dp = (dxp * dxp) + (dyp * dyp);
	     r = (dp <= r2p) ? 255 : 0;
	     putchar(r);
	     putchar(g);
	     putchar(b);
	   }
	}
     }
  }
 return(0);
}