BAEKJOON_13549

import java.io.*;
import java.sql.Array;
import java.util.*;
public class Main {

    static int[] dist = new int[100001];
    static boolean[] visit = new boolean[100001];

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

        StringTokenizer st = new StringTokenizer(br.readLine());

        int N = Integer.parseInt(st.nextToken());
        int K = Integer.parseInt(st.nextToken());
        dist[N]=0;
        visit[N]=true;
        Queue<Integer> q = new LinkedList<>();
        Queue<Integer> next_q = new LinkedList<>();

        q.add(N);

        while (!q.isEmpty()) {
            int now = q.poll();
            for (int next : new int[]{now * 2, now - 1, now + 1}) {
                if (next >= 0 && next < 100001) {
                    if (visit[next] == false) {
                        visit[next] = true;
                        if (next == now * 2) {
                            q.add(next);
                            dist[next] = dist[now];
                        } else {
                            next_q.add(next);
                            dist[next] = dist[now] + 1;
                        }
                    }

                }
            }
            if (q.isEmpty()) {
                q = new LinkedList<>(next_q);
                //next_q = new LinkedList<Integer>();
                next_q.clear();
            }
        }
        bw.write(String.valueOf(dist[K]));
        bw.flush();
        bw.close();
    }
}