大一python，求解答

Question

有没有好人帮我解答一下这些题啊，谢谢了（为什么要三十个字符啊）

Answer 1

def one():
    try:
        num = int(input("请输入一个正整数:"))
        count = 0
        while num > 1:
            if num % 2 == 0:
                num = num / 2
            else:
                num = num * 3 + 1
            print("{}次的结果：{}".format(count, num))
            count += 1
    except ValueError:
        print("ERROR")


def two():
    for i in range(100, 1000):
        a = int(i % 10)
        b = int((i / 10) % 10)
        c = int((i / 100) % 10)
        if a * a * a + b * b * b + c * c * c == i:
            print(i)


def three():
    try:
        num = int(input("请输入一个正整数:"))
        sum = 1
        for i in range(1, num):
            if i % 2 == 0:
                sum = sum + (i / (i + 1))
            else:
                sum = sum - (i / (i + 1))
        print(round(sum, 6))
    except ValueError:
        print("输入参数不合法！")


def six():
    try:
        num = int(input("请输入一个月份数:"))
        sum = 1
        loop = int(num / 3)
        for i in range(1, loop + 1):
            sum = sum * 2
        print("{}个月后一共有{}对兔子".format(num, sum))
    except ValueError:
        print("输入参数不合法！")

def seven():
    try:
        km = int(input("请输入一个里程数:"))
        wait = int(input("请输入等待时间:"))
        if km <= 3:
            fee = 13 + wait * 1
        elif km <= 15:
            fee = 13 + (km - 3) * 2.3 + wait * 1
        else:
            fee = 13 + 12 * 2.3 + ((km - 15) * 2.3 * 1.5) + wait * 1
        print("{}里程，等待时间{}的车费一共为:{}".format(km, wait, round(fee, 2)))
    except ValueError:
        print("输入参数不合法！")