#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

typedef struct 
{
    int longitude ;
    int latitide ;
    int height ;
    int points ;
}data;

void sortHeight(data * d, int size){
    int temp;
    for(int index=0;index < size;index++){
        for(int iindex=index+1;iindex < size;iindex++){
            if(d[index].height > d[iindex].height){
                temp = d[index].height;
                d[index].height = d[iindex].height;
                d[iindex].height = temp;
            }
        }
    }
    
}

int process(data * xander ,int len,int lat,int lon){
    int points =xander[0].points;
    //printf("%d",xander[0].points);
    int currentpos =0;
    for(int i=1;i<len;i++){
        if(abs(xander[currentpos].longitude - xander[i].longitude) <= lon && 
           abs(xander[currentpos].longitude - xander[i].longitude) <= lat)
            {
            points = points + xander[i].points;
            currentpos = i;
            //printf("%d",xander[i].points);
        }
        
    }
    return points;
}

int main(){
    int n; 
    int x; 
    int y; 
    scanf("%d %d %d",&n,&x,&y);
    
    data * xander = (data *) malloc(sizeof(data) * n);
   // int * a_longitude = (int *) malloc(sizeof(int) * n)
   // int * a_height = (int *) malloc(sizeof(int) * n)
   // int * a_points = (int *) malloc(sizeof(int) * n)
    for(int a0 = 0; a0 < n; a0++){
        int latitude; 
        int longitude; 
        int height; 
        int points; 
        scanf("%d %d %d %d",&latitude,&longitude,&height,&points);
        
        xander[a0].latitide = latitude;
        xander[a0].longitude = longitude;
        xander[a0].height = height;
        xander[a0].points = points;
    }
    sortHeight(xander, n);
   /*  for(int index=0;index < n;index++){
         printf("%d \n",xander[index].height);
     }*/
     printf("%d",process(xander,n,x,y));
    
    return 0;
}