백준 18258번: 큐 2 (파이썬)

import sys
from collections import deque

n = int(sys.stdin.readline().rstrip())
list = deque()
for i in range(n):
  t = sys.stdin.readline().rstrip()
  if 'push' == t.split()[0]:
    list.append(t.split()[1])
  elif t == 'pop':
    if len(list) == 0:
      print(-1)
    else:
      print(list.popleft())
  elif t == 'size':
    print(len(list))
  elif t == 'empty':
    if len(list) == 0:
      print(1)
    else:
      print(0)
  elif t == 'front':
    if len(list) == 0:
      print(-1)
    else:
      print(list[0])
  elif t == 'back':
    if len(list) == 0:
      print(-1)
    else:
      print(list[-1])