[BaekJoon] 10866번 : 덱 (Python)

1일 1문제 81일차!

오늘의 문제는 백준의 덱 (Deque) 입니다.

10866번: 덱

Solution

my_dequeue = []
command_list = []

num = input()

for i in range(int(num)):
    command = input()
    command_list.append(command)
    
for command in command_list:
    cmd = command.split()
    
    if cmd[0] == 'push_back':
        my_dequeue.append(cmd[1])
    elif cmd[0] == 'push_front':
        my_dequeue.insert(0, cmd[1])
    elif cmd[0] == 'pop_front':
        if len(my_dequeue) != 0:
            print(my_dequeue.pop(0))
        else:
            print(-1)
    elif cmd[0] == 'pop_back':
        if len(my_dequeue) != 0:
            print(my_dequeue.pop(-1))
        else:
            print(-1)
    elif cmd[0] == 'back':
        if len(my_dequeue) != 0:
            print(my_dequeue[-1])
        else:
            print(-1)
    elif cmd[0] == 'front':
        if len(my_dequeue) != 0:
            print(my_dequeue[0])
        else:
            print(-1)
    elif cmd[0] == 'size':
        print(len(my_dequeue))
    elif cmd[0] == 'empty':
        if len(my_dequeue) != 0:
            print(0)
        else:
            print(1)

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