# Enter your code here. Read input from STDIN. Print output to STDOUT
def solve(a, b):
    if a==1 and b==1:
        return 0
    else:
        return solve(max(a, b)/2, min(a, b))+solve(max(a, b)-max(a, b)/2, min(a, b))+1

n, m = map(int, raw_input().split())
print solve(n, m)