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#include<bits/stdc++.h>
#define VAR(i,n) __typeof(n) i = (n)
#define loop(i,j,s) for(int i=j;i<s;i++)
#define loopback(i,j,s) for(int i=j;i>=s;i--)
#define foreach(i,c) for(VAR(i,(c).begin());i!=(c).end();i++)
#define pln( x ) cout << x << "\n"
#define ps( x ) cout << x << " "
#define entr cout << "\n"
#define pcnt(i) __builtin_popcount(i)
#define ll long long
#define pb push_back
#define mp make_pair
#define ff first
#define ss second
#define SIZE(c) (c).size()
#define ALL(c) (c).begin(), (c).end()
using namespace std;
typedef vector<int> VI;
typedef pair<int, int> PII;
typedef vector<vector<int> > VVI;
const int INFTY=20000000;
const int MAX=1100;
const ll MOD=1000000009;

void coutTab(int* tab,int n){
	loop(i,0,n){
		cout<<tab[i]<<" ";
	}
	cout<<"\n";
}

template<class T> void coutVec(vector<T> tab){
	for(T t : tab){
		cout<<t<<" ";
	}
	cout<<"\n";
}
//------------------------------------------

ll M[MAX][MAX];
const ll p =31;
int X,Y;

void add1(int x1,int y1,int x2,int y2,int n) {
	if(x1>x2) swap(x1,x2);
	if(y1>y2) swap(y1,y2);
	loop(i,x1,x2) {
		loop(j,y1,y2) {
			M[i][j] = ((M[i][j]*p)%MOD + n)%MOD;
			M[i][j] = ((M[i][j]*p)%MOD + 1)%MOD;
		}
	}
}

void add2(int x1,int y1,int x2,int y2,int n) {
	if(x1>x2) swap(x1,x2);
	if(y1>y2) swap(y1,y2);
	loop(i,0,x1) {
		loop(j,y1,y2) {
			M[i][j] = ((M[i][j]*p)%MOD + n)%MOD;
			M[i][j] = ((M[i][j]*p)%MOD + 2)%MOD;
		}
	}
	loop(i,x2,X) {
		loop(j,y1,y2) {
			M[i][j] = ((M[i][j]*p)%MOD + n)%MOD;
			M[i][j] = ((M[i][j]*p)%MOD + 2)%MOD;
		}
	}
}

void add3(int x1,int y1,int x2,int y2,int n) {
	if(x1>x2) swap(x1,x2);
	if(y1>y2) swap(y1,y2);
	loop(i,x1,x2) {
		loop(j,0,y1) {
			M[i][j] = ((M[i][j]*p)%MOD + n)%MOD;
			M[i][j] = ((M[i][j]*p)%MOD + 3)%MOD;
		}
	}
	loop(i,x1,x2) {
		loop(j,y2, Y) {
			M[i][j] = ((M[i][j]*p)%MOD + n)%MOD;
			M[i][j] = ((M[i][j]*p)%MOD + 3)%MOD;
		}
	}
}

void add4(int x1,int y1,int x2,int y2,int n) {
	if(x1>x2) swap(x1,x2);
	if(y1>y2) swap(y1,y2);
	loop(i,0,x1) {
		loop(j,0,y1) {
			M[i][j] = ((M[i][j]*p)%MOD + n)%MOD;
			M[i][j] = ((M[i][j]*p)%MOD + 4)%MOD;
		}
	}
	loop(i,0,x1) {
		loop(j,y2, Y) {
			M[i][j] = ((M[i][j]*p)%MOD + n)%MOD;
			M[i][j] = ((M[i][j]*p)%MOD + 4)%MOD;
		}
	}
	loop(i,x2,X) {
		loop(j,0,y1) {
			M[i][j] = ((M[i][j]*p)%MOD + n)%MOD;
			M[i][j] = ((M[i][j]*p)%MOD + 4)%MOD;
		}
	}
	loop(i,x2,X) {
		loop(j,y2, Y) {
			M[i][j] = ((M[i][j]*p)%MOD + n)%MOD;
			M[i][j] = ((M[i][j]*p)%MOD + 4)%MOD;
		}
	}
}	


map<ll, int> C;
int count() {
	int best = 0;
	loop(i,0,X) {
		loop(j,0,Y) {
			C[M[i][j]]++;
			best=max(best, C[M[i][j]]);
		}
	}
	return best;
}

void print() {
	loop(i,0,X) {
		
		loop(j,0,Y) ps(M[i][j]);
		entr;
	}
}

int main(){
	ios_base::sync_with_stdio(0);
	int n;
	cin>>n>>X>>Y;
	int x1,x2,y1,y2;
	
	loop(i,0,n) {
		cin>>x1>>y1>>x2>>y2;
		add1(x1,y1,x2,y2,i);
		add2(x1,y1,x2,y2,i);
		add3(x1,y1,x2,y2,i);
		add4(x1,y1,x2,y2,i);
		//print();
	}

	pln(count());
}