<?php
$N = trim(fgets(STDIN));
$route = array_fill(0, $N, -1);
$route[0] = $queue[0] = 1;

while(!empty($queue)) {
	$pos = array_shift($queue);
	$move = substr_count(decbin($pos), 1);
    $next = $pos + $move;
    $prev = $pos - $move;
    if($next <= $N && $route[$next - 1] === -1) {
        $route[$next - 1] = $route[$pos - 1] + 1;
		$queue[] = $next;
	}
	if($prev > 1 && $route[$prev - 1] === -1) {
		$route[$prev - 1] = $route[$pos - 1] + 1;
		$queue[] = $prev;
	}
}

echo $route[$N -1].PHP_EOL;