def main
    
    n = STDIN.readline.chomp.to_i
    queue = [{index: 1, count: 1}]
    visited = []
    visited[1] = true

    while queue.size > 0
        q = queue[0]

        if q[:index] == n
            puts q[:count]
            return
        end

        f = forward(q[:index])
        if f <= n && visited[f].nil?
            queue << {index: f, count: q[:count] + 1}
            visited[f] = true
        end

        b = back(q[:index])
        if b >= 1 && visited[b].nil?
            queue << {index: b, count: q[:count] + 1}
            visited[b] = true
        end

        queue.shift
    end

    puts -1

end

def forward(n)

    n + bit_count(n)

end

def back(n)

    n - bit_count(n)

end

def bit_count(n)

    count = 0
    n.bit_length.times {|i| count += 1 if n[i] == 1}
    count

end

main()