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#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <queue>
#include <stack>
#include <cstdio>
#include <set>
#include <map>
#include <string>
#include <queue>
#include <stack>
#include <unordered_map>
using namespace std;

typedef long long int LL;
typedef long double LD;
typedef vector<int> VI;
typedef vector<LL> VLL;
typedef vector<LD> VLD;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef vector<PII> VPII;

const int INF = 1000000001;
const LD EPS = 10e-9;

#define FOR(x, b, e) for(int x = b; x <= (e); ++x)
#define FORD(x, b, e) for(int x = b; x >= (e); --x)
#define REP(x, n) for(int x = 0; x < (n); ++x)
#define VAR(v, n) __typeof(n) v = (n)
#define ALL(c) (c).begin(), (c).end()
#define SIZE(x) ((int)(x).size())
#define FORE(i, c) for(VAR(i, (c).begin()); i != (c).end(); ++i)
#define MP make_pair
#define PB push_back
#define ST first
#define ND second
#define abs(a) ((a)<0 ? -(a) : (a))
#define max(a, b) ((a) > (b) ? (a) : (b))
#define min(a, b) ((a) < (b) ? (a) : (b))

const int MAX_N = 500005;

struct Rect
{
    int x1, y1, x2, y2;
};

int n, X, Y, xx1, yy1, xx2, yy2;
Rect rects[MAX_N];
map<vector<int>, int> counts;

void convertCords(int& xx1, int& yy1, int& xx2, int& yy2)
{
    if(xx1 > xx2)
    {
        swap(xx1, xx2);
        swap(yy1, yy2);
    }

    if(yy1 > yy2)
    {
        swap(yy1, yy2);
    }
}

bool isInside(const int x, const int y, const Rect& rect)
{
    return x >= rect.x1 && x < rect.x2 && y >= rect.y1 && y < rect.y2;
}

bool isInLeftRight(const int x, const int y, const Rect& rect)
{
    return (y >= rect.y1 && y < rect.y2) && (x < rect.x1 || x >= rect.x2);
}

bool isInUpDown(const int x, const int y, const Rect& rect)
{
    return (x >= rect.x1 && x < rect.x2) && (y < rect.y1 || y >= rect.y2);
}

int main()
{
    ios_base::sync_with_stdio(0);

    cin >> n >> X >> Y;
    for(int i = 0; i < n; ++i)
    {
        cin >> xx1 >> yy1 >> xx2 >> yy2;

        convertCords(xx1, yy1, xx2, yy2);
        rects[i] = {xx1, yy1, xx2, yy2};
    }

    int maxCount = 0;
    for(int x = 0; x < X; ++x)
    {
        for(int y = 0; y < Y; ++y)
        {
            vector<int> poses;
            for(int k = 0; k < n; ++k)
            {
                if(isInside(x, y, rects[k]))
                {
                    poses.push_back(0);
                }
                else if(isInLeftRight(x, y, rects[k]))
                {
                    poses.push_back(1);
                }
                else if(isInUpDown(x, y, rects[k]))
                {
                    poses.push_back(2);
                }
                else
                {
                    poses.push_back(3);
                }
            }

            const int currCount = ++counts[poses];
            maxCount = max(maxCount, currCount);
        }
    }

    cout << maxCount << endl;

    return 0;
}