#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;

template <class T> int sgn(T x) { return (x > 0) - (x < 0); }
template<class T>
struct Point {
	typedef Point P;
	T x, y;
	explicit Point(T x=0, T y=0) : x(x), y(y) {}
	bool operator<(P p) const { return tie(x,y) < tie(p.x,p.y); }
	bool operator==(P p) const { return tie(x,y)==tie(p.x,p.y); }
	P operator+(P p) const { return P(x+p.x, y+p.y); }
	P operator-(P p) const { return P(x-p.x, y-p.y); }
	P operator*(T d) const { return P(x*d, y*d); }
	P operator/(T d) const { return P(x/d, y/d); }
	T dot(P p) const { return x*p.x + y*p.y; }
	T cross(P p) const { return x*p.y - y*p.x; }
	T cross(P a, P b) const { return (a-*this).cross(b-*this); }
	T dist2() const { return x*x + y*y; }
	double dist() const { return sqrt((double)dist2()); }
	// angle to x-axis in interval [-pi, pi]
	double angle() const { return atan2(y, x); }
	P unit() const { return *this/dist(); } // makes dist()=1
	P perp() const { return P(-y, x); } // rotates +90 degrees
	P normal() const { return perp().unit(); }
	// returns point rotated 'a' radians ccw around the origin
	P rotate(double a) const {
		return P(x*cos(a)-y*sin(a),x*sin(a)+y*cos(a)); }
	friend ostream& operator<<(ostream& os, P p) {
		return os << "(" << p.x << "," << p.y << ")"; }
};

typedef Point<ll> P;
vector<P> minkowskiSum(vector<vector<P>> hs) {
	auto cmp = [](P a, P b) {
		return make_pair(a.x < 0 || a.x == 0 && a.y < 0, a.y * (ll)b.x)
			< make_pair(b.x < 0 || b.x == 0 && b.y < 0, a.x * (ll)b.y);
	};
	typedef tuple<P, int, int> T;
	auto cmp_tup = [&cmp](T a, T b) {
		auto& [pa, ja, ia] = a;
		auto& [pb, jb, ib] = b;
		if (cmp(pa, pb)) return false;
		if (cmp(pb, pa)) return true;
		return make_pair(ja, ia) < make_pair(jb, ib);
	};
	priority_queue<T, vector<T>, decltype(cmp_tup)> pq(cmp_tup);
	P cur = P();
	int s = 0, t = 0;
	rep(i, 0, sz(hs)) {
		auto& v = hs[i];
		rotate(begin(v), min_element(all(v)), end(v));
		if (sz(v) > 1) pq.push({v[1] - v[0], 0, i}), s += sz(v);
		cur = cur + v[0];
	}
	vector<P> h(s + 1);
	for (h[t++] = cur; sz(pq);) {
		auto [p, j, i] = pq.top(); pq.pop();
		t -= (t >= 2 && !cmp(h[t - 1] - h[t - 2], p));
		h[t++] = (cur = cur + p);
		auto& v = hs[i];
		if (++j < sz(v)) pq.push({v[(j + 1) % sz(v)] - v[j], j, i});
	}
	return {h.begin(), h.begin() + t - (t >= 2 && h[0] == h[t - 1])};
}

vector<P> convexHull(vector<P> pts) {
	if (sz(pts) <= 1) return pts;
	sort(all(pts));
	vector<P> h(sz(pts)+1);
	int s = 0, t = 0;
	for (int it = 2; it--; s = --t, reverse(all(pts)))
		for (P p : pts) {
			while (t >= s + 2 && h[t-2].cross(h[t-1], p) <= 0) t--;
			h[t++] = p;
		}
	return {h.begin(), h.begin() + t - (t == 2 && h[0] == h[1])};
}

int main() {
	cin.tie(0)->sync_with_stdio(0);
	cin.exceptions(cin.failbit);
	int n; cin >> n;
	vector<vector<int>> adj(n);
	vector<vector<P>> pts(n);
	for (int i = 0; i < n; i++) {
		int k; cin >> k;
		if (k == 0) {
			int x, y; cin >> x >> y;
			pts[i].push_back(P(x, y));
		} else {
			while (k--) {
				int v; cin >> v; v--;
				adj[i].push_back(v);
			}
		}
	}
	for (int u = n - 1; u >= 0; u--) {
		if (adj[u].empty()) {
			continue;
		}
		vector<vector<P>> cur;
		for (int v : adj[u]) {
			cur.push_back(move(pts[v]));
		}
		for (auto& poly : cur) {
			for (P& p : poly) {
				p = P(0, 0) - p;
			}
			auto sum = minkowskiSum(cur);
			pts[u].insert(pts[u].end(), sum.begin(), sum.end());
			for (P& p : poly) {
				p = P(0, 0) - p;
			}
		}
		pts[u] = convexHull(pts[u]);
	}
	ll ans = 0;
	for (P& p : pts[0]) {
		ans = max(ans, p.dist2());
	}
	cout << ans;
}