题解

#include<iostream>
#include<vector>
using namespace std;
vector<int> v[10001];
int x,y,a,b;
int main(){
	int m,q;
	cin>>m;
	for(int i=1;i<=m;i++){
		cin>>x>>y>>a>>b;
		if(a==1){
			v[x].push_back(y);
		}
		if(b==1){
			v[y].push_back(x);
		}
	}
	cin>>q;
	if(v[q].size()==0){
		cout<<"none";
		return 0;
	}
	for(int i=0;i<v[q].size();i++){
		cout<<v[q][i]<<" ";
	}
	return 0;
}