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#include<bits/stdc++.h>
using namespace std;
 
ostream& operator<<(ostream &out, string str) {
	for(char c : str) out << c;
	return out;
}
 
template<class L, class R> ostream& operator<<(ostream &out, pair<L, R> p) {
	return out << "(" << p.first << ", " << p.second << ")";
}
 
template<class T> auto operator<<(ostream &out, T a) -> decltype(a.begin(), out) {
	out << "{";
	for(auto it = a.begin(); it != a.end(); it = next(it))
		out << (it != a.begin() ? ", " : "") << *it;
	return out << "}";
}
 
void dump() { cerr << "\n"; }
template<class T, class... Ts> void dump(T a, Ts... x) {
	cerr << a << ", ";
	dump(x...);
}
 
#ifdef DEBUG
#  define debug(...) cerr << "[" #__VA_ARGS__ "]: ", dump(__VA_ARGS__)
#else
#  define debug(...) false
#endif
 
#define REP(i, n) for(int i = 0; i < n; i++)
#define FOR(i, a, b) for(int i = a; i <= b; i++)
#define ST first
#define ND second
 
template<class T> int size(T && a) { return a.size(); }
 
using LL = long long;
using PII = pair<int, int>;

mt19937 _gen(2137);
int rd(int a, int b) {
	return uniform_int_distribution<int>(a, b)(_gen); 
}

struct Node {
	int size = 1, val = 0;
	int cnt = 0, lazy = 0;
};


struct Tree {
	vector<Node> tree;
	int size = 1;

	Tree(int n, vector<int> w) {
		while(size < n) size *= 2;
		tree.resize(size * 2);
		for(int i = size; i < size + n; i++)
			tree[i].cnt = w[i - size];
		for(int i = size + n; i < size * 2; i++)
			tree[i].val = -1e7;
		for(int i = size - 1; i >= 1; i--) {
			tree[i].size = tree[i * 2].size + tree[i * 2 + 1].size;
			tree[i].cnt = tree[i * 2].cnt + tree[i * 2 + 1].cnt;
		}
	}

	inline void propagate(int v) {
		if(tree[v].lazy == 0) return;
		REP(i, 2) {
			tree[v * 2 + i].val += tree[v].lazy;
			tree[v * 2 + i].lazy += tree[v].lazy;
		}
		tree[v].lazy = 0;
	}

	int query() { return tree[1].cnt; }

	inline void add(int l, int r, int val, int v = 1) {
		if(l == 0 && r == tree[v].size - 1) {
			tree[v].val += val;
			tree[v].lazy += val;
			return;
		}

		propagate(v);
		int m = tree[v].size / 2;
		if(r < m)
			add(l, r, val, v * 2);
		else if(m <= l)
			add(l - m, r - m, val, v * 2 + 1);
		else
			add(l, m - 1, val, v * 2), add(0, r - m, val, v * 2 + 1);

		tree[v].val = max(tree[v * 2].val, tree[v * 2 + 1].val);
		tree[v].cnt = 0;
		REP(i, 2) if(tree[v].val == tree[v * 2 + i].val)
			tree[v].cnt += tree[v * 2 + i].cnt;
	}
};

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	int n, X, Y;
	cin >> n >> X >> Y;
	vector<PII> x(n), y(n);
	REP(i, n) cin >> x[i].ST >> y[i].ST >> x[i].ND >> y[i].ND;

	auto solve = [n](int m, vector<PII> &x) -> LL {
		vector<int> q = {0, m};
		REP(i, n) {
			if(x[i].ST > x[i].ND) 
				swap(x[i].ST, x[i].ND);
			q.emplace_back(x[i].ST);
			q.emplace_back(x[i].ND);
		}

		sort(q.begin(), q.end());
		auto u = unique(q.begin(), q.end());
		q.erase(u, q.end());

		vector<int> w(size(q) - 1);
		REP(i, size(w)) w[i] = q[i + 1] - q[i];
		Tree tree(size(w), w);

		auto scale = [&](int &val) {
			auto it = lower_bound(q.begin(), q.end(), val);
			val = distance(q.begin(), it);
		};
		REP(i, n) scale(x[i].ST), scale(x[i].ND);
	
		vector<vector<int>> evs(size(q));
		REP(i, n) {
			tree.add(x[i].ST, x[i].ND - 1, -1);
			evs[x[i].ST].emplace_back(i);
			evs[x[i].ND].emplace_back(i);
		}

		int ans = 0;
		vector<int> on(n, 1);
		for(auto &v : evs) {
			for(int &i : v) {
				tree.add(x[i].ST, x[i].ND - 1, 2 * on[i]);
				on[i] *= -1;
			}
			ans = max(ans, tree.query());
		}

		return ans;
	};

	cout << solve(X, x) * solve(Y, y) << "\n";
}