var a: real;
begin
writeln('a');
read(a);
if a>0 then
begin
if a<=0.5 then writeln('a>0 a!=[0.5;2]')
else
if a>=2 then writeln('a>0 a!=[0.5;2]')
else writeln('Not right!')
end
else writeln('Not right!')
end.