mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    r, d = map(int, input().split())

    if d < r:
        print(0)
    elif d == r:
        print(4)
    elif r < d < 2*r:
        print(8)
    elif d == 2*r:
        print(4)
    else:
        print(0)


if __name__ == '__main__':
    main()