program CheckNumberInInterval;

var
n, a, b: Integer;

begin
writeln('Enter a number n:');
readln(n);

writeln('Enter the interval boundaries a and b:');
readln(a, b);

if (n > a) and (n < b) then
writeln('The number ', n, ' belongs to the interval (', a, ';', b, ').')
else
writeln('The number ', n, ' does not belong to the interval (', a, ';', b, ').');

end.