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queue_list.py
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queue_list.py
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class CustomNoItemsException(Exception):
def __init__(self):
pass
class QueueUsingList:
def __init__(self):
self.__array = [] # Список, реализующий очередь
def put(self, element):
self.__array.append(element)
def size(self):
return len(self.__array)
def get(self):
if self.size() == 0:
raise CustomNoItemsException
else:
return self.__array.pop(0)
n = int(input())
queueUsingList = QueueUsingList()
for i in range(n):
try:
command = input().split(' ')
if len(command) == 1:
print(getattr(queueUsingList, command[0])())
else:
getattr(queueUsingList, command[0])(command[1])
except CustomNoItemsException:
print('error')