var
x1,x2,x3,x4,y1,y2,y3,y4,r:integer;
k1,k2,b1,b2,x,y:real;
begin
k1:=0;
k2:=0;
read(x1,y1);
read(x2,y2);
read(x3,y3);
read(x4,y4);
if x1>=x2 then
begin
r:=x1;
x1:=x2;
x2:=r;
r:=y1;
y1:=y2;
y2:=r;
end;
if x3>=x4 then
begin
r:=x3;
x3:=x4;
x4:=r;
r:=y3;
y3:=y4;
y4:=r;
end;
if y2=y1 then k1:=0
else k1:=(y2-y1)/(x2-x1);
if y3=y4 then k2:=0
else k2:=(y4-y3)/(x4-x3);
if k1=k2 then write('No')
else
begin
b1:=y1-k1*x1;
b2:=y3-k2*x3;
x:=(b2-b1)/(k1-k2);
if (x<=x2) and (x>=x1) or (x<=x4) and (x>=x3)
then write('Yes')
else write('No');
end;
end.