import std.stdio;
import std.string;
import std.conv;
import std.algorithm;
import std.range;
import core.bitop;


struct Block
{
    uint bits;
    bool forward, backward;
    uint optimum = -1;
}


void main()
{
    immutable n = readln.chomp.to!uint;
    auto game = new Block[n + 1];
    foreach (i, ref x; game) x.bits = i.popcnt;
    uint[] route = [1];
    while (!route.empty) {
        auto point = route.back;
        if (point < 1 || point > n) {
            route.popBack;
            continue;
        }
        with (game[point]) {
            optimum = min(route.length, optimum);
            if (!forward) {
                route ~= point + bits;
                forward = true;
            } else if (!backward) {
                route ~= point - bits;
                backward = true;
            } else {
                route.popBack;
            }
        }
    }
    writeln(cast(int)game[n].optimum);
}