# Here your code !

# via : http://www.nminoru.jp/~nminoru/programming/bitcount.html

class Fixnum
    BITS_MATERIAL = [
        0x55555555,
        0x33333333,
        0x0f0f0f0f,
        0x00ff00ff,
        0x0000ffff
    ]
    def bits
        BITS_MATERIAL.each_with_index.inject(self) {|s,(v,i)|
            (s & v) + ((s >> 2**i) & v)
        }
    end
end
n = gets.to_i

INF = 2000000
RANGE = (1..n)

dp = Array.new(n+1, INF)
q = [1]
dp[1] = 1
g = -1
until q.empty?
    c = q.shift
    i = dp[c]
    if c == n
        g = i
    end
    d = c.bits
    [c + d, c - d].select { |v| RANGE.include?(v) }.each do |v|
        if  i + 1 < dp[v]
            q.push(v)
            dp[v] = i + 1
        end
    end
end
puts g