백준_10845 (큐_뼈대문제)

• 링크 : https://www.acmicpc.net/problem/10845
  
  

''' 내가푼 - 시간초과 해결 '''
from collections import deque
import sys

def isEmpty(arr):
    return 0 if arr else 1

def front(arr):
    return -1 if not arr else arr[0]

def back(arr):
    return -1 if not arr else arr[-1]

result = deque()
for _ in range(int(sys.stdin.readline())):
    cmd = sys.stdin.readline().split()
    
    if cmd[0] == "push":
        result.append(cmd[1])
    elif cmd[0] == "pop":
        if not result:
            print(-1)
        else:
            print(result.popleft())
    elif cmd[0] == "size":
        print(len(result))
    elif cmd[0] == "empty":
        print(isEmpty(result))
    elif cmd[0] == "front":
        print(front(result))
    elif cmd[0] == "back":
        print(back(result))