PTA甲級考試真題練習154——1154 Vertex Coloring

題目

思路

水題

代碼

#include <iostream>
#include <vector>
#include <set>
using namespace std;
vector<pair<int, int>> edge;
int main()
{
	int n, m;
	cin >> n >> m;
	edge.resize(m);
	for (int i = 0; i < m; ++i)
		cin >> edge[i].first >> edge[i].second;
	int qn;
	cin >> qn;
	for (int i = 0; i < qn; ++i) {
		vector<int> vec;
		set<int> s;
		vec.resize(n);
		for (int j = 0; j < n; ++j) {
			cin >> vec[j];
			s.emplace(vec[j]);
		}
		bool mark = false;
		for (auto& p : edge) {
			if (vec[p.first] == vec[p.second]) {
				mark = true;
				break;
			}
		}
		if (mark)
			cout << "No" << endl;
		else
			cout << s.size() << "-coloring" << endl;
	}
	return 0;
}