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

double xmin = -2;
double xmax = 1;
double ymin = -1;
double ymax = 1;

int escapes(double cr, double ci, int it) {
  double zr = 0;
  double zi = 0;
  double zrtmp;
  int i;
  
  for(i=0; i<it; i++) {
    // z <- z^2 + c
    zrtmp = zr*zr - zi*zi + cr;
    zi = 2*zr*zi + ci;
    zr = zrtmp;
    if (zr*zr + zi*zi > 4) {
      return 1;
    }
  }
  return 0;
}

int main(int argc, char **argv) {
  int iters, xstep, ystep;
  int xc, yc;
  double x, y;
  
  xstep = atoi(argv[1]);
  ystep = atoi(argv[2]);
  iters = atoi(argv[3]);
  
  for(yc=0; yc<ystep; yc++) {
    y = yc*(ymax-ymin)/ystep + ymin;
    for(xc=0; xc<xstep; xc++) {
      x = xc*(xmax-xmin)/xstep + xmin;
      if (escapes(x, y, iters)) {
        putchar(' ');
      } else {
        putchar('X');      
      }
    }
    putchar('\n');
  }
  return 0;
}