def rec_count(n,m):
    if (n == 1):
        return m - 1
    if (m == 1):
        return n - 1
    if (n > m):
        return 1 + rec_count(n, (m + 1)//2) + rec_count(n, m // 2)
    if (m >= n):
        return 1 + rec_count(m, (n + 1)//2) + rec_count(m, n // 2)
n, m = map(int, input().strip().split())
print (str(rec_count(n, m)))