program Project2;

{$APPTYPE CONSOLE}


var x1,y1,x2,y2,x3,y3,x4,y4,
p1p3_p1p2,p1p4_p1p2,p3p1_p3p4,p3p2_p3p4:real;
procedure s(var a,b:real);
var c:real;
begin
c:=a;
a:=b;
b:=c;
end;

begin
  readln(x1,y1,x2,y2,x3,y3,x4,y4);
if x1<x2 then s(x1,x2);
if y1<y2 then s(y1,y2);
if x3<x4 then s(x3,x4);
if y3<y4 then s(y3,y4);




p1p3_p1p2:=(x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
p1p4_p1p2:=(x4-x1)*(y2-y1)-(x2-x1)*(y4-y1);
p3p1_p3p4:=(x1-x3)*(y4-y3)-(x4-x3)*(y1-y3);
p3p2_p3p4:=(x2-x3)*(y4-y3)-(x4-x3)*(y2-y3);
if (p1p3_p1p2*p1p4_p1p2<=0)and(p3p1_p3p4*p3p2_p3p4<=0) then writeln('Yes') else writeln('No');



end.