카카오 오픈채팅방

문자열 처리와 map을 활용해 해결할 수 있는 문제

 

문제: https://www.welcomekakao.com/learn/courses/30/lessons/42888?language=cpp

깃허브주소: https://github.com/surinoel/boj/blob/master/Programmers_오픈채팅방.cpp

 

	#include <map>
	#include <string>
	#include <vector>
	#include <sstream>
	#include <iostream>
	using namespace std;
	map<string, string> m;
	vector<string> solution(vector<string> record) {
	vector<string> ret;
	for (int i = 0; i < record.size(); i++) {
	istringstream f(record[i]);
	string s;
	vector<string> tokens;
	while (getline(f, s, ' ')) {
	tokens.push_back(s);
	}
	if (tokens[0] == "Enter") {
	m[tokens[1]] = tokens[2];
	string tans = tokens[1] + ",님이 들어왔습니다.";
	ret.push_back(tans);
	}
	else if (tokens[0] == "Leave") {
	string tans = tokens[1] + ",님이 나갔습니다.";
	ret.push_back(tans);
	}
	else {
	m[tokens[1]] = tokens[2];
	}
	}
	vector<string> ans;
	for (int i = 0; i < ret.size(); i++) {
	istringstream f(ret[i]);
	vector<string> tokens;
	string s;
	while (getline(f, s, ',')) {
	tokens.push_back(s);
	}
	ans.push_back(m[tokens[0]] + tokens[1]);
	}
	return ans;
	}

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