Tbl = (0..13).map{|i| 1<<i}.tap{|a|
  break (0..10000).map{|i|
    a.count{|b| (i & b) != 0}
  }
}

def f(n)
  visited = [false]*Tbl.size
  count = 1
  curr = 1

  while curr != n
    count += 1
    if visited[curr] || curr == 0
      return -1
    else
      visited[curr] = true
    end

    curr += if curr + Tbl[curr] > n
      -Tbl[curr]
    else
      Tbl[curr]
    end
  end

  count
end

N = gets.to_i
p f(N)