function Main(input) {
  function countTarget(str, target) {
    return (str.match(new RegExp(target, "g")) || []).length;
  }
  function rec(num, c) {
    if (array[num] && array[num] <= c || num > N) return
    array[num] = c
    const k = countTarget(num.toString(2), "1")
    rec(num + k, c + 1)
    rec(num - k, c + 1)
  }
  const N = parseInt(input.trim())
  let array = [-1, 1]
  rec(2, 2)
  console.log(array[N] ? array[N] : -1)
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"))