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;
        n = sc.nextInt();
        x = sc.nextInt();
        y = sc.nextInt();
        int lat[] = new int[n];
        int lon[] = new int[n];
        int height[] = new int[n];
        int points[] = new int[n];
        long ans=0;
        for(int i=0;i<n;i++)
        {
            lat[i] = sc.nextInt();
            lon[i] = sc.nextInt();
            height[i] = sc.nextInt();
            points[i] = sc.nextInt();
        }
        for(int i=0;i<n-1;i++)
        {
            if(height[i] < height[i+1] && lat[i] - lat[i+1]  <= x && lat[i] - lat[i+1] <=y)
            {
                ans+=points[i];
            }
        }
        System.out.println(ans+points[n-1]);
    }
}