public static void main$($string$[]$ args$)\{$

stack stack $=$ new stack $()$;

int $n=18$;

while

stack.push $($n$\%2)$ ;

$n=\frac{n}{2}$;

$\}$

String result $=""$;

while $(!$stack.isEmpty$())$

$\{$

result $+=$ stack.top $()$;

$\}$

stack.pop $()$ ;

system.out.println $($result$)$;

$\}$

Your answer:

$18181$

$11010$

$10010$