k = 0

while True:

    s = input('请输入q退出：')

    if s == 'q':

        k += 1

        continue

    else:

        k += 2

        break

print(k)

ss = list(set("jzzszyj"))

ss.sort()

print(ss)

ls =list({'shandong':200, 'hebei':300, 'beijing':400})

print(ls)

for n in range(400,500):

    i = n // 100

    j = n // 10 % 10

    k = n % 10

    if n == i ** 3 + j ** 3 + k ** 3:

        print(n)

s = "I love Python"

ls = s.split()

ls.reverse()

print(ls)

s=''

ls = [1,2,3,4]

for l in ls:   

    s += str(l)

print(s)