import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.Queue;

// 정수 a를 k로 만들기 https://www.acmicpc.net/problem/25418
public class AtoK {

  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    int[] split = Arrays.stream(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    Queue<int[]> queue = new LinkedList<>();
    queue.add(new int[]{split[0], 0});

    int ans = 0;
    boolean[] visited = new boolean[split[1] + 1];
    while (!queue.isEmpty()) {
      int[] poll = queue.poll();
      visited[poll[0]] = true;
      if (poll[0] == split[1]) {
        ans = poll[1];
        break;
      }

      if (poll[0] * 2 < visited.length) {
        if (!visited[poll[0] * 2]) {
          queue.add(new int[]{poll[0] * 2, poll[1] + 1});
        }
      }

      if (poll[0] + 1 < visited.length) {
        if (!visited[poll[0] + 1]) {
          queue.add(new int[]{poll[0] + 1, poll[1] + 1});
        }
      }
    }
    System.out.println(ans);
  }

}