jitutonglong.pl0

PL0的一个编译器

const z=0;
var head,foot,cock,rabbit,n;
begin
	n:=z;
	read(head,foot);
	cock:=1;
	while cock<=head do
	begin
		rabbit:=head-cock;
		if cock*2+rabbit*4=foot then
		begin
			write(cock,rabbit);
			n:=n+1
		end;
		cock:=cock+1;
	end;
	if n=0 then write(0,0)
end.