# ZeroJudge - f668: FJCU_109_Winter_Day1_Lab3 Adjacency Matrix 和 Adjacency List 練習
### 題目連結：https://zerojudge.tw/ShowProblem?problemid=f668
###### tags: `ZeroJudge` `模擬`

#include <iostream>
using namespace std;

int main(){
	cin.sync_with_stdio(false); cin.tie(nullptr);
	int vertices, edges, from, to;
	bool adjacency[11][11] = {};
	cin >> vertices >> edges;
	while (edges--) {
		cin >> from >> to;
		adjacency[from][to] = adjacency[to][from] = true;
	}
	for (int i = 1; i <= vertices; ++i) {
		cout << i << ':';
		for (int j = 1; j <= vertices; ++j)
			if (adjacency[i][j])
				cout << ' ' << j;
		cout << '\n';
	}
}