#!/bin/python

import sys


n,x,y = raw_input().strip().split(' ')
n,x,y = [int(n),int(x),int(y)]
ans=0
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)]
    ans=ans+points
    # your code goes here
print ans