<?php


$goal = trim(fgets(STDIN));
$here = 1;
$count = 1;
$used_array = [];

for ($i=1; $i<=$goal; $i++) {

    $i = $here; // 現在地に書き換え

    $binary = decbin($i);
    $move = substr_count( $binary, 1 );
    $count++;

    if ($goal == 1) {
        $count--;
        break;
    } elseif ( ($here + $move) == $goal ) {
        break;
    } elseif ( ($here + $move) > $goal ) {
        $here = $here - $move;
        if (array_search($here, $used_array) !== FALSE) {
            $count = -1;
            break;
        }

    } else {
        $here = $here + $move;
    }

    $used_array[] = $i; // 既に使用した
}


echo $count."\n";