1. 문제 2. 풀이 과정 def solution(record): user = {} result = [] for r in record: order = r.split() if order[0] == "Enter": user[order[1]] = order[2] result.append((order[1], "님이 들어왔습니다.")) elif order[0] == "Leave": result.append((order[1], "님이 나갔습니다.")) elif order[0] == "Change": user[order[1]] = order[2] answer = [] for uid, command in result: temp = user[uid]+command answer.append(temp) return answer
