백준 (boj) 11723 파이썬 - 집합

문제 링크 : https://www.acmicpc.net/problem/11723

11723번: 집합

 

 

 

 

import sys
input = sys.stdin.readline

s = []


def boj(command,x):
    global s
    if command == "add":
        if x not in s:
            s.append(x)
    elif command == "remove":
        if x in s:
            s.remove(x)
    elif command == "check":
        if x in s: 
            print(1)
        else : 
            print(0)
    elif command == "toggle":
        if x in s : s.remove(x)
        else : s.append(x)
    elif command == "all" : s = [i for i in range(1,21)]
    elif command == "empty" : s=[]

M = int(input())

for _ in range(M):
    command = input().strip()
    if command == "all" or command == "empty" :
        boj(command,0)
    else : 
        command,x = command.split()
        boj(str(command),int(x))