# -*- coding: utf-8 -*-
N, K = map(int, raw_input().split())

SIZE = 1000 + 2
GETA = 500
field = [[0 for i in xrange(SIZE + 1)] for i in xrange(SIZE + 1)]
imosField = [[0 for i in xrange(SIZE + 1)] for i in xrange(SIZE + 1)]

for _ in xrange(N):
    X, Y, H = map(int, raw_input().split())
    field[X + GETA][Y + GETA] = H

for _ in xrange(K):
    AX, AY, W, H, D = map(int, raw_input().split())
    MX = min(AX + GETA + W + 1, SIZE)
    MY = min(AY + GETA + H + 1, SIZE)

    imosField[AX + GETA][AY + GETA] += D
    imosField[MX][AY + GETA] -= D
    imosField[AX + GETA][MY] -= D
    imosField[MX][MY] += D

# X方向に累積和で算出
for y in xrange(SIZE + 1):
    for x in xrange(SIZE):
        imosField[x + 1][y] += imosField[x][y]

# Y方向に累積和で算出
for x in xrange(SIZE + 1):
    for y in xrange(SIZE):
        imosField[x][y + 1] += imosField[x][y]

# ダメージを与える
total = 0
for x in xrange(SIZE + 1):
    for y in xrange(SIZE + 1):
        total += max(field[x][y] - imosField[x][y], 0)

print total