［AtCoder］ABC-354｜A - Exponential Plant

設問ページ

• 🔗ABC-354 A - Exponential Plant

提出結果

def getInt():
    return int(input())


def main():
    h = getInt()

    d = 0
    t = 0
    while h >= t:
        t += (2 ** d)
        d += 1
    print(d)


if __name__ == "__main__":
    main()