<?php
$n = trim(fgets(STDIN));
$a = array_fill(0, $n + 1, -1);
$queue[0] = $a[1] = 1;
while (!empty($queue)) {
	$m = array_shift($queue);
	$bc = substr_count(decbin($m), 1);
	$move = $m - $bc;
	if ($move > 0 && ($a[$move] == -1 || $a[$move] > $a[$m] + 1)) {
		$a[$move] = $a[$m] + 1;
		$queue[] = $move;
	}
	$move = $m + $bc;
	if ($move <= $n && ($a[$move] == -1 || $a[$move] > $a[$m] + 1)) {
		$a[$move] = $a[$m] + 1;
		$queue[] = $move;
	}
}
print $a[$n];