PAT-1154（Vertex Coloring ）+map使用+vector建图+set的使用

Vertex Coloring

PAT-1154

#include<iostream>
#include<cstring>
#include<string>
#include<algorithm>
#include<cstdio>
#include<sstream>
#include<set>
#include<map>
#include<cmath>
#include<vector> 
#include<unordered_map>
using namespace std;
const int maxn=10004;
int n,m;
vector<int>ve[maxn]; 
int colo[maxn];
int main(){
	cin>>n>>m;
	for(int i=0;i<m;i++){
		int a,b;
		cin>>a>>b;
		ve[a].push_back(b);
		ve[b].push_back(a);
	}
	int k;
	cin>>k;
	while(k--){
		set<int>se; 
		for(int j=0;j<n;j++){
			cin>>colo[j];
			se.insert(colo[j]);
		}
		int numk=0;
		bool flag=true;
		for(int j=0;j<n;j++){
			int acolor=colo[j];
			for(auto item:ve[j]){
				int b=item;
				int bcolor=colo[b];
				if(bcolor==acolor){
					flag=false;
					break;
				}
			}
			if(!flag)
				break;
		}
		if(flag){
			cout<<se.size()<<"-coloring"<<endl;
		}else{
			cout<<"No"<<endl;
		}
	}
	return 0;
}