Baekjoon #1697

import sys
from collections import deque

def input():
    return sys.stdin.readline().rstrip()

def solve():
    N, K = map(int, input().split())

    deq = deque([N])
    visit = dict()
    visit[N] = 0
    
    while deq:
        cur = deq.popleft()
        if cur == K:
            print(visit[cur])
            return

        for nxt in (cur*2, cur+1, cur-1):
            if 0 <= nxt <= 100000 and visit.get(nxt, -1) == -1:
                deq.append(nxt)
                visit[nxt] = visit[cur]+1

solve()