import sys
input=lambda:sys.stdin.readline().rstrip()
N,K=map(int,input().split())
ene=[list(map(int,input().split())) for i in range(N)]
mag=[list(map(int,input().split())) for i in range(K)]
board=[[0 for i in range(1502)] for j in range(1502)]
for i in mag:
	board[i[0]+500][i[1]+500]+=i[4]
	board[i[0]+i[2]+501][i[1]+500]-=i[4]
	board[i[0]+500][i[1]+i[3]+501]-=i[4]
	board[i[0]+i[2]+501][i[1]+i[3]+501]+=i[4]
for j in range(1,1502):
	board[0][j]+=board[0][j-1]
for i in range(1,1502):
	board[i][0]+=board[i-1][0]
	for j in range(1,1502):
		board[i][j]+=board[i-1][j]+board[i][j-1]-board[i-1][j-1]
ans=0
for i in ene:
	ans+=max(i[2]-board[i[0]+500][i[1]+500],0)
print(ans)