// Online C++ compiler to run C++ program online
#include <iostream>
using namespace std;

int main() {
    int a;
    int b;
    cin >> a >> b;
    if(b > a) {
        cout << b-a;
    }
    else if(b==a) {
        cout << 0;
    }
    else if(a > b) {
        int count = 0;
        while(a!=b) {
            if(a == b) {
                break;
            }
            if(a%2 == 1) {
            ++a;
            count++;
            }
            a/=2;
            count ++;
            if(a<b) {
                count += b-a;
                a=b;
            }
        }
        cout << count;
    }
    return 0;
}