老师，5-2编程练习不会啊，

# coding: utf-8

num = 1

count = 0

# 循环条件

while num < 100:    # 循环体，设置条件

    if (num % (3*7) != 0) and (num%3 == 0 or num%7 == 0):

        count += 1          # 补全代码

    num = num + 1

print(count)

为啥要打括号啊