import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n,x,y,i,j,temp,total;
        n = sc.nextInt();
        x = sc.nextInt();
        y = sc.nextInt();
        int lat[] = new int[n];
        int lon[] = new int[n];
        int h[] = new int[n];
        int p[] = new int[n];
        for(i=0;i<n;i++){
            lat[i] = sc.nextInt();
            lon[i] = sc.nextInt();
            h[i] = sc.nextInt();
            p[i] = sc.nextInt();
        }
        for(i=0;i<n;i++) {
            for(j=0;j<n-1;j++) {
                if(h[j]>h[j+1]) {
                    temp = h[j];
                    h[j] = h[j+1];
                    h[j+1] = temp;
                    
                    temp = lat[j];
                    lat[j] = lat[j+1];
                    lat[j+1] = temp;
                    
                    temp = lon[j];
                    lon[j] = lon[j+1];
                    lon[j+1] = temp;
                    
                    temp = p[j];
                    p[j] = p[j+1];
                    p[j+1] = temp;
                }
            }
        }
        total = 0;
        for(i=0;i<n-1;i++) {
            if(((Math.abs(lat[i] - lat[i+1])) <= x) && ((Math.abs(lon[i] - lon[i+1])) <= y)) {
                total += p[i];
            }
            else {
                continue;
            }
        }
        if(((Math.abs(lat[n-2] - lat[n-1])) <= x) && ((Math.abs(lon[n-2] - lon[n-1])) <= y)) {
                total += p[n-1];
        }
        System.out.println(total);
    }
}