import patterns;

defaultpen(0.2);
bbox(white, Fill);

real di = stdin;

path a;
int n = stdin;
for (int i = 0; i < n; ++i) {
  int px = stdin;
  int py = stdin;
  a = a -- (px, py);
}

draw(a, gray);

pair u,v;

u=(-2,4); v=(-2+di,4);
draw(u -- v);
filldraw(circle(u, 0.2), fillpen=green);
filldraw(circle(v, 0.2), fillpen=red);

u=(2.25,3.25); v=(3.284108947,1.85232684);
draw(u -- v);
filldraw(circle(u, 0.2), fillpen=green);
filldraw(circle(v, 0.2), fillpen=red);

u=(4.5,2.5); v=(5.4,2.5);
draw(u -- v);
filldraw(circle(u, 0.2), fillpen=green);
filldraw(circle(v, 0.2), fillpen=red);

shipout(bbox(xmargin=1, white, Fill));