#include<bits/stdc++.h>
using namespace std;

int n;
int memo[11111];
bool flg[11111];
int k;

int solve(int p){

  if(p == n) return 1;
  if(p < 1 || p > n) return 1<<28;
  //if(memo[p]) return memo[p];
  if(flg[p]) return 1<<28;
  
  flg[p] = true;  

  int cnt = 0;
  for(int i=0;i<32;i++)
    if((p & (1 << i))) cnt++;

  int ret = 0;
  ret += min(solve(p-cnt), solve(p+cnt)) + 1;
  
  return memo[p] = ret;
}

int main(){

  int ans;
  
  cin >> n;
  
  ans = solve(1);
  if(ans >= 1<<28) puts("-1");
  else cout << ans << endl;
  
}