// yukicoder: No.60 魔法少女
// 2019.6.19 bal4u

#include <stdio.h>

#if 1
#define gc() getchar_unlocked()
#else
#define gc() getchar()
#endif
int in()   // 整数の入力（負数対応）
{
	int n = 0, c = gc();
	if (c == '-') {	c = gc();
		do n = 10*n + (c & 0xf), c = gc(); while (c >= '0');
		return -n;
	}
	do n = 10*n + (c & 0xf), c = gc(); while (c >= '0');
	return n;
}

#define BASE 500
int X[100005], Y[100005], HP[100005];
int map[1005][1005];

int main()
{
	int i, x, y, w, h, d, s, N, K;

	N = in(), K = in();
	for (i = 0; i < N; i++) {
		X[i] = in() + BASE;
		Y[i] = in() + BASE;
		HP[i] = in();
	}
	
	while (K--) {
		x = BASE + in(), y = BASE + in();
		w = x + in() + 1, h = y + in() + 1, d = in();
		if (w > 1001) w = 1001;
		if (h > 1001) h = 1001;
		map[y][x] += d;
		map[y][w] -= d;
		map[h][x] -= d;
		map[h][w] += d;
	}
	
	for (y = 0; y <= 1001; y++) for (x = 0; x <= 1001; x++)
		map[y][x+1] += map[y][x];
	for (y = 0; y <= 1001; y++) for (x = 0; x <= 1001; x++)
		map[y+1][x] += map[y][x];
	
	s = 0;
	for (i = 0; i < N; i++) {
		d = HP[i] - map[Y[i]][X[i]];
		if (d > 0) s += d;
	}
	printf("%d\n", s);
	return 0;
}