#define _CRT_SECURE_NO_DEPRECATE
#include<iostream>
#include<algorithm>
#include<string>
#include<cmath>
#include<set>
#include<queue>
using namespace std;
const int N_MAX = 100000+1;
set<int>s;
queue<int>que;
int dp[N_MAX*10];
void bfs(int begin,int end) {
    s.insert(begin);
    que.push(begin);
    while (!que.empty()) {
        int dx = que.front();
        que.pop();
        for (int i = 0; i < 3; i++) {        
            int x;
            switch (i) {
            case 0:
                if(dx-1>=0&&dx-1<N_MAX)
                    x = dx - 1;
                break;
            case 1:
                if (dx + 1 < N_MAX&&dx+1>=0)
                    x = dx + 1;
                break;
            case 2:
                if (2*dx>=0&&2 * dx < N_MAX)
                    x = dx * 2;
                break;
            }
            set<int>::iterator it = s.find(x);
            if (it == s.end()) {//x这个点还没去过
                s.insert(x);
                dp[x] = dp[dx] + 1;
                if (x == end)return;//找到end,返回
                que.push(x);
            }
            
        }
    }
}

int main() {
    int N, K;
    while (scanf("%d%d", &N, &K)!=EOF) {
        memset(dp, 0, sizeof(dp));
        bfs(N, K);
        //////
        while (!que.empty())
            que.pop();
        //////
        s.clear();
        printf("%d\n", dp[K]);
    }
    return 0;
}