24. Two Buttons.py

'''
https://codeforces.com/problemset/problem/520/B
B. Two Buttons
'''


n, m= map(int, input().split())

count = 0

while m > n:
      if m % 2 == 0:
            m //= 2
      else:
            m += 1
      count += 1

count += n - m

print(count)