#include <iostream>
#include <string>
#include <queue>
#define print(x) cout << x << endl;
using namespace std;

queue<int>Q;//キュー
bool visited[10001]; //訪問済みチェック
int counter[10001]; //あるマス目までの最短移動数

/*ビットカウント*/
int BitNum(int bits)
{
    bits = (bits & 0x55555555) + (bits >> 1 & 0x55555555);
    bits = (bits & 0x33333333) + (bits >> 2 & 0x33333333);
    bits = (bits & 0x0f0f0f0f) + (bits >> 4 & 0x0f0f0f0f);
    bits = (bits & 0x00ff00ff) + (bits >> 8 & 0x00ff00ff);
    return (bits & 0x0000ffff) + (bits >>16 & 0x0000ffff);
}


int main(void){
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    int N;
    cin >> N;
    
    int i, mov, next, c;
    visited[1] = true;
    counter[1] = 1;
    counter[N] = -1;
    Q.push(1);
    /*幅優先探索*/
    while(!Q.empty()){
        i = Q.front();
        Q.pop();
        c = counter[i];
        mov = BitNum(i);

        if((i+mov) == N){
            next = i + mov;
            visited[next] = true;
            counter[next] = c + 1;
            break;
        }
        
        if(!visited[i+mov] && (i+mov) < N){
            next = i + mov;
            Q.push(next);
            visited[next] = true;
            counter[next] = c + 1;
        }
        
        if(!visited[i-mov] && (i-mov) > 1){
            next = i - mov;
            Q.push(next);
            visited[next] = true;
            counter[next] = c + 1;
        }
        
    }
    print(counter[N]);
    return 0;
}