오픈채팅방 풀이

#include <string>
#include <vector>
#include <queue>
#include <map>

using namespace std;

vector<string> solution(vector<string> record) {
	vector<string> answer;
	queue<pair<string , string>> q;
	map<string, string> id;

	for (int i = 0; i < record.size(); i++) {
		string str;
		vector<string> temp;
		for (int j = 0; j < record[i].size(); j++) {
			if (record[i][j] == ' ') {
				temp.push_back(str);
				str.clear();
			}
			else 
				str.push_back(record[i][j]);
		}
		temp.push_back(str);
		if(temp[0][0] == 'C'){
			id[temp[1]] = temp[2];
		}
		else {
			if (temp[0][0] == 'E')
				id[temp[1]] = temp[2];
			q.push(make_pair(temp[0], temp[1]));
		}
	}
    while(!q.empty()){
        string cmd = q.front().first;
        string idname = q.front().second;
        q.pop();

        if(cmd == "Enter")
            answer.push_back(id[idname]+"님이 들어왔습니다.");
        else
            answer.push_back(id[idname] + "님이 나갔습니다.");
    }
	return answer;
}