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 in = new Scanner(System.in);
        int n = in.nextInt();
        int x = in.nextInt();
        int y = in.nextInt();
        int tp=0;
        for(int a0 = 0; a0 < n; a0++){
            int latitude = in.nextInt();
            int longitude = in.nextInt();
            int height = in.nextInt();
            int points = in.nextInt();
            // your code goes here
            if(a0==0){
               tp=points; 
            }
            else{
            int a [] ={latitude,longitude,height,points};
            
            if(Math.abs(latitude-a[0])<=x && Math.abs(longitude-a[1])<=y){
                tp +=points;
                
               
            }
            }   
                
                
                
            }
        
           System.out.print(tp); 
        }
        
    }