#!/bin/python

import sys


n,x,y = raw_input().strip().split(' ')
n,x,y = [int(n),int(x),int(y)]
la=[]
lo=[]
h=[]
p=[]
for a0 in xrange(n):
    latitude,longitude,height,points = raw_input().strip().split(' ')
    latitude,longitude,height,points = [int(latitude),int(longitude),int(height),int(points)]
    # your code goes here
    la.append(latitude)
    lo.append(longitude)
    h.append(height)
    p.append(points)
#print la,lo,h,p
hd=h
h.sort()
lad=[]
lod=[]
pd=[]
for j in range(n):
    ind=hd.index(h[j])
    lad.append(la[ind])
    lod.append(lo[ind])
    pd.append(p[ind])
#print lad,lod,pd
count=0
for l1 in range(n-1):
    flag=0
    if abs(lad[l1+1]-lad[l1])==x and abs(lod[l1+1]-lod[l1])==y:
        count+=pd[l1]
        flag=1
if flag==1:
    print count+pd[n-1]
else:
    print count