［AtCoder］ABC-170｜B - Crane and Turtle

設問ページ

• 🔗ABC-170 B - Crane and Turtle

提出結果

def getIntMap():
    return map(int, input().split())


def main():
    x, y = getIntMap()

    # x = a + b
    # y = 2a + 4b
    a = (4 * x - y) // 2
    b = x - a

    if y % 2 == 1:
        print('No')
    elif a >= 0 and b >= 0:
        print('Yes')
    else:
        print('No')


if __name__ == "__main__":
    main()