#include<iostream>
#include<vector>
#include<algorithm>
#include<queue>
using namespace std;
typedef pair<int, int> pii;
int n;
void bfs(vector<int> &block, int s){
  block[s] = 1;
  queue<pii> que;
  que.push(pii(2, s));
  int cnt;
  while(not que.empty()){
    s = que.front().second;
    cnt = que.front().first;
    int w = __builtin_popcount(s);
    que.pop();
    if(s - w >= 1 and block[s - w] > cnt){
      block[s - w] = cnt;
      que.push(pii(cnt + 1, s - w));
    }
    if(n >= s + w and block[s + w] > cnt){
      block[s + w] = cnt;
      que.push(pii(cnt + 1, s + w));
    }
  }
}

int main(){
  std::cin >> n;
  vector<int> block(n + 1, 1e9);
  bfs(block, 1);
  if(n == 1)std::cout << 0 << std::endl;
  else if(block[n] != 1e9)std::cout << block[n] << std::endl;
  else std::cout << -1 << std::endl;
  return 0;
}