🐣 문제

링크 : https://www.acmicpc.net/problem/14425

🐥 코드

#include <iostream>
#include <map>
using namespace std;

int main(){
	int N, M;
	cin >> N >> M;

	map<string, bool> m;
	for(int i = 0; i < N; i++){
		string tmp = "";
		cin >> tmp;
		m.insert(make_pair(tmp, true));
	}

	int cnt = 0;
	for(int i = 0 ; i < M; i++){
		string tmp = "";
		cin >> tmp;
		if(m[tmp] == true) cnt ++;
	}

	cout << cnt;
	
	return 0;
}