baekjoon. 큐2 (18258) [python][Silver IV]

문제 : https://www.acmicpc.net/problem/18258

18258번: 큐 2

 

문제풀이 

import sys
from collections import deque

n = int(input())

queue = deque([])

for i in range(n):
    str =  sys.stdin.readline()
    strArray = str.split()
  
    command = strArray[0]
    if len(strArray) > 1:
        args = strArray[1]
        
        
    if (command == 'push') :
        queue.append(args)
    elif (command == 'pop') :
        if not queue:
            print(-1)
        else:
            print(queue.popleft())
    elif (command == 'size') :
        print(len(queue))
    elif (command == 'empty') :
        if not queue:
            print(1)
        else:
            print(0)
    elif (command == 'front') :
        if not queue:
            print(-1)
        else:
            print(queue[0])
    elif (command == 'back') :
        if not queue:
            print(-1)
        else:
            print(queue[-1])

 

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https://zetawiki.com/wiki/Python_deque_%ED%81%90

Python deque 큐 - 제타위키