#include <bits/stdc++.h>
#include <atcoder/scc>
using namespace std;
using ll = long long;
int main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(nullptr);
	int N;
	cin >> N;
	atcoder::scc_graph G(N);
	vector<vector<int>> H(N);
	for(int i = 0; i < N; i++) {
		int m;
		cin >> m;
		while(m--) {
			int a;
			cin >> a;
			a--;
			G.add_edge(i, a);
			H[i].push_back(a);
		}
	}
	auto scc = G.scc();
	bool ok = false;
	for(int x: scc[0]) if(x == 0) ok = true;
	vector<int> idx(N);
	for(int i = 0; i < scc.size(); i++) for(int x: scc[i]) idx[x] = i;
	vector<int> T(scc.size() - 1);
	for(int i = 0; i < scc.size(); i++) for(int x: scc[i]) for(int y:H[x]) if(idx[y] == i + 1) T[i] = 1;
	bool ok1 = true;
	for(int i = 0; i < scc.size() - 1; i++) if(!T[i]) ok1 = false;
	cout << (ok && ok1 ? "Yes\n" : "No\n");
	cerr << ok << " " << ok1 << endl;
}