#!/usr/local/bin/python3

# 0 = latitude
# 1 = longitude
# 2 = height
# 3 = points



def get_possible_cities(current_city, total_cities):
	next_cities = []
	for city in total_cities:
		# skip if not higher
		if current_city[2] >= city[2]:
			continue
		# skip if latitude diff is > x
		if abs(current_city[0] - city[0]) > x:
			continue
		# skip if longitude diff is > y
		if abs(current_city[1] - city[1]) > y:
			continue
		next_cities.append(city)
	return next_cities

n, x, y = [int(x) for x in input().strip().split()]
cities = []
net_points = 0
for _ in range(n):
	latitude, longitude, height, points = [int(x) for x in input().strip().split()]
	cities.append((latitude, longitude, height, points))
	net_points += points

print(net_points)