285. 오픈채팅방

백준

1. Python

def solution(record):
    name = {}
    room = [] #0은 들어가기, 1은 나가기
    for r in record:
        info = r.split(' ')
        if info[0] == "Enter":
            name[info[1]] = info[2]
            room.append((info[1], 0))
        elif info[0] == "Leave":
            room.append((info[1], 1))
        else:
            name[info[1]] = info[2]
    
    answer = []
    
    for i, j in room:
        if j == 0:
            answer.append(name[i] + "님이 들어왔습니다.")
        else:
            answer.append(name[i] + "님이 나갔습니다.")
    
    return answer