백준 소스코드 [C++] 1764 듣보잡

www.acmicpc.net/problem/1764

1764번: 듣보잡

백준 소스코드 [C++] 1764 듣보잡

#include <iostream>
#include <algorithm>
#include <queue>
#include <string.h>
#include <limits.h>
#include <vector>
#include <math.h>
#include <stack>
#include <bitset>
typedef long long ll;
using namespace std;

int main() {
	ios_base::sync_with_stdio(false), cin.tie(nullptr);
	int n, k;
	string s;
	vector<string> v1;
	vector<string> v2;
	cin >> n >> k;
	v1.resize(n);
	for (int i = 0;i < n;i++) cin >> v1[i];
	sort(v1.begin(), v1.end());
	for (int i = 0;i < k;i++) {
		cin >> s;
		if (binary_search(v1.begin(), v1.end(), s)) v2.push_back(s);
	}
	sort(v2.begin(), v2.end());
	cout << v2.size() << '\n';
	for (auto a : v2) cout << a << '\n';
	return 0;
}