[Python] 백준 10845 - 큐

문제

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

 

해설

큐의 동작을 구현하는 문제이다.

 

def solution(command):
    queue = []
    for c in command:
        if c[0] == "push":
            queue.append(c[1])
        elif c[0] == "pop":
            print("-1" if len(queue) == 0 else queue.pop(0))
        elif c[0] == "size":
            print(len(queue))
        elif c[0] == "empty":
            print("1" if len(queue) == 0 else "0")
        elif c[0] == "front":
            print("-1" if len(queue) == 0 else queue[0])
        elif c[0] == "back":
            print("-1" if len(queue) == 0 else queue[-1])


n = int(input())
commands = [input().split(" ") for _ in range(n)]
solution(commands)