import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
       long N = sc.nextLong();
        long M = sc.nextLong();
        int count = 0;
        while(N*2 < M){
            if(M%2 != 0){
                M = (M+1)/2;
                count = count+2;
            }else{
                M = M/2;
                count++:
            }
        }
        while(N!=M){
           if(N > M){
               N = N-1;
               count++;
            }else if(N*2 - 1 == M){
                 N = N*2;
                 count++;
            }else if(N*2 > M){
                 N = N - 1;
                 count++;
            }else{
                 N = N*2;
                 count++;
            }
        }
        System.out.println(count);
    }        
}