[伯俊]10845号:Q(Python)

質問する

私の答え

import sys
input=sys.stdin.readline

n=int(input())
que=[]

def push(p):
    que.append(p)
def pop():
    if len(que)!=0:
        print(que.pop(0)) #맨 앞 pop
    else:
        print(-1)

def size():
    print(len(que))

def empty():
    if len(que)==0:
        print(1)
    else:
        print(0)

def front():
    if len(que)!=0:
        print(que[0])
    else:
        print(-1)
    
def back():
    if len(que)!=0:
        print(que[-1])
    else:
        print(-1)
    
for i in range(n):
    command=input().split()
    if command[0]=='push':
        push(command[1])
    elif command[0]=='pop':
        pop()
    elif command[0]=='size':
        size()
    elif command[0]=='empty':
        empty()
    elif command[0]=='front':
        front()
    elif command[0]=='back':
        back()