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

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int N,inf = 1e9; cin >> N;
    vector<int> dist(N+1,inf);
    dist.at(1) = 1;
    queue<int> Q; Q.push(1);
    while(Q.size()){
        int num = Q.front();
        int one = 0;
        while(num){
            if(num&1) one++;
            num >>= 1;
        }
        num = Q.front(); Q.pop();
        if(num+one <= N && dist.at(num+one) == inf) dist.at(num+one) = dist.at(num)+1,Q.push(num+one);
        if(num-one >= 1 && dist.at(num-one) == inf) dist.at(num-one) = dist.at(num)+1,Q.push(num-one);
    }
    if(dist.at(N) == inf) dist.at(N) = -1;
    cout << dist.at(N) << endl;
}