<?php
$n = trim(fgets(STDIN));
$map = array_fill(0, $n, -1);
$queue[0] = $map[0] = $step = 1;

while (!empty($queue)) {
		$pos = array_shift($queue);
		$step = $map[$pos -1 ];
		$bit = substr_count(decbin($pos),1,0);
		if ($pos + $bit <= $n && -1 === $map[$pos + $bit -1]){
			$move = $pos + $bit;
			$map[$move -1 ] = $step +1;
			$queue[] = $move;
		}
		if ($pos - $bit > 1 && -1 === $map[$pos - $bit -1]){
			$move = $pos - $bit;
			$map[$move -1 ] = $step +1;
			$queue[] = $move;
		}
}
echo ($n != 1? $map[$n -1 ]: 0) . PHP_EOL;