t = 1

while t:

    x, y = map(int, input().split())
    if x == 0 and y == 0:
        print(0)
    elif x == 0 or  y == 0:
        print(1)
    else:

        if abs(x) == abs(y):
            print(1)
        else:
            print(2)


    t -= 1