[프로그래머스/C++] 완주하지 못한 선수

완주하지 못한 선수

_unordered_map을 사용해서 <string, int> bucket을 가지는 map생성
명수만큼 second에 지정
completion에 있으면 --하여 >0인 경우 answer로 지정

#include <string>
#include <vector>
#include <unordered_map>


using namespace std;

string solution(vector<string> participant, vector<string> completion) {
    unordered_map<string, int> umap;
    
    for(auto ele : participant){
        umap[ele]++;
    }
    for(auto ele : completion){
        umap[ele]--;
    }
    for(auto ele : umap){
        if(ele.second)
            return ele.first;
    }
}

#include <iostream>
#include <string>
#include <vector>
#include <unordered_map>

using namespace std;

unordered_map<string, int> umap;


string solution(vector<string> participant, vector<string> completion) {
	string answer = "";

	for (auto player : participant) {
		if (umap.end() == umap.find(player))
			umap.insert(make_pair(player, 1));
		else
			umap[player]++;
	}
		

	for (auto player : completion)
		umap[player]--;

	for (auto player : participant) {
		if (umap[player] > 0) {
			answer = player;
			break;
		}
	}

	return answer;
}

#include <iostream>
#include <string>
#include <vector>
#include <unordered_map>

using namespace std;

unordered_map<string, int> umap;


string solution(vector<string> participant, vector<string> completion) {
	string answer = "";

	for (auto player : participant) {
		if (umap.end() == umap.find(player))
			umap.insert(make_pair(player, 1));
		else
			umap[player]++;
	}
		
	

	for (auto player : completion)
		umap[player]--;

	for (auto player : participant) {
		if (umap[player] > 0) {
			answer = player;
			break;
		}
	}

	return answer;
}


int main(void)
{
	vector<string> part = { "mislav", "stanko", "mislav", "ana" };
	vector<string> comp = { "stanko", "ana", "mislav" };
	cout << solution(part, comp);
	return 0;
}