import math
template times*(n:int,body:untyped): untyped = (for _ in 0..<n: body)
proc scanf(frmt: cstring):void {.varargs, importc:"scanf",header: "<stdio.h>" .}

var field: array[1001, array[1001, int]]
var damage: array[1002, array[1002, int]]
var N,K : int32
scanf("%d %d", addr N, addr K)
N.times:
  var x,y,h: int32
  scanf("%d %d %d", addr x, addr y, addr h )
  field[y + 500][x + 500] = h
K.times:
  var x1,y1,w,h,d: int32
  scanf("%d %d %d %d %d", addr x1, addr y1, addr w , addr h , addr d )
  x1 += 500
  y1 += 500
  let
    x2 = 1001.min(x1 + w + 1)
    y2 = 1001.min(y1 + h + 1)
  damage[y1][x1] += d
  damage[y1][x2] -= d
  damage[y2][x1] -= d
  damage[y2][x2] += d
for x in 0..1000:
  for y in 1..1000:
    damage[x][y] +=  damage[x][y - 1]
for x in 1..1000:
  for y in 0..1000:
    damage[x][y] += damage[x - 1][y]
var R = 0
for x in 0..1000:
  for y in 0..1000:
    if field[x][y] > damage[x][y]:
      R += field[x][y] - damage[x][y]
echo R