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

int N;
vector<int> bit(10001, 0);
vector<int> dp(10001, -1);
bool flag = false;

int Count(int i){
    int res = 0;
    while(i > 0){
       if(i % 2 == 1) ++res;
       i /= 2;
    }
    return res;
}

void rec(int count = 1, int corrent = 1){
    
    if(~dp[corrent]) return ;
    dp[corrent] = count;
    
    if(corrent == N){
        cout << count << endl;
        flag = true;
        return;
    }
    
    int c;
    if((c = corrent + bit[corrent]) <= N) rec(count + 1, c);
    if((c = corrent - bit[corrent]) >= 1) rec(count + 1, c);
    
    return;
}

int main(void){
    
    cin >> N;
    for(int i = 1; i <= N; ++i) bit[i] = Count(i);
    
    rec();
    if(!flag) cout << -1 << endl; 
    
    return 0;
}