import Class
operation = int(input())
if operation == 1:
try:
num = int(input())
except:
print("请输入一个整数")
while True:
flag = int(Class.Collatz(num))
if flag != 1:
num = flag
print(flag)
else:
print(flag)
break
elif operation == 2:
spam = ['yyl', 'zxy', 'yyl', 'zxy']
print(Class.ListToString(spam))
elif operation == 3:
Class.beautifulprint()
elif operation == 4:
Class.Dictionary(2)
elif operation == 5:
Class.stringexcerise()
