백준 10845번: 큐

 

 

 

www.acmicpc.net/problem/10845

10845번: 큐

 

구현 언어: 파이썬

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import sys

input = sys.stdin.readline
n = int(input())

queue = []

for i in range(n):
    command = list(input().split())

    if command[0] == 'push':
        queue.append(int(command[1]))
    elif command[0] == 'pop':
        if queue:
            print(queue.pop(0))
        else:
            print(-1)
    elif command[0] == 'size':
        print(len(queue))
    elif command[0] == 'empty':
        if queue:
            print(0)
        else:
            print(1)
    elif command[0] == 'front':
        if queue:
            print(queue[0])
        else:
            print(-1)
    elif command[0] == 'back':
        if queue:
            print(queue[-1])
        else:
            print(-1)

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시도 횟수: 1

 

구현 포인트: