忘了当时怎么做了。。。

---

#include <bits/stdc++.h>
using namespace std;
int G[250][250];
vector<vector<int>> v;
int main() {
	fill (G[0], G[0] + 250 * 250, 0);
	int n, m, a, b, k, len, now;
	scanf ("%d %d", &n, &m);
	v.resize(n + 1);
	for (int i = 0; i < m; i++) {
		scanf ("%d %d", &a, &b);
		G[a][b] = G[b][a] = 1;
		v[a].push_back(b);
		v[b].push_back(a);
	}
	scanf ("%d", &k);
	for (int i = 0; i < k; i++) {
		scanf ("%d", &len);
		int minAns = 999999999, flag = 0, cnt;
		set<int> st;
		vector<int> vis(n + 1), temp(len);
		for (int j = 0; j < len; j++) scanf ("%d", &temp[j]);
		for (int j = 0; j < temp.size(); j++) {
//			cout <<temp[j] << endl;
			for (int u = j + 1; u < temp.size(); u++) {
				if (G[temp[j]][temp[u]] == 0) {
//					cout << j << "     " << u << endl;
					flag = 1;
					break;
				}
			}
		}
		if (flag == 1) printf ("Area %d needs help.\n", i + 1);
		else {
			vector<int> cnt(n + 1);
			for (int j = 0; j < temp.size(); j++) {
				for (auto it : v[temp[j]]) {
					cnt[it]++;
					if (cnt[it] == len) {
						st.insert(it);
//						cout << "it : " << it << endl;
					}
				}
			}
			if (st.size() == 0) printf ("Area %d is OK.\n", i + 1);
			else printf ("Area %d may invite more people, such as %d.\n", i + 1, *st.begin());
		}
	}
}