program p_1;

var a,x,y,m,n,l,i,j,k:longint;

begin

read(x,y,m,n,l);

if m=n then

begin

write('Impossible');

exit;

end;

j:=abs(m-n);

if xn then a:=y-x;

if m0 then write(k);

end.

错在哪了呀？