uses graphabc;  

var  

p:array[0..3]of point, t:integer;  

procedure lines;  

begin  

  line(100,100,300,300);  

  line(100,300,300,100);  

  line(200,100,200,300);  

  line(100,200,300,200);  

end;  

begin  

p[0].x := 150; p[0].y := 200;  

p[1].x := 200; p[1].y := 250;  

p[2].x := 250; p[2].y := 200;  

p[3].x := 200; p[3].y := 150;  

SetBrushColor(clblack);  

readln(t);  

if t < 0 then  

begin  

  Polygon(p[0],p[1],p[2],p[3]);  

  lines;  

end;  

if t > 0 then  

begin  

  circle(200,200,50);  

  lines;  

end;  

end.