using System;
using System.Linq;

class Program
{
    public static void Main(string[] args)
    {
        var first = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
        var enemies = new long[1001,1001];
        int n = first[0];
        int k = first[1];
        const int offset = 500;
        for (int i = 0; i < n; i++)
        {
            var enemy = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            enemies[enemy[0] + offset, enemy[1] + offset] = enemy[2];
        }
        var attacks = new long[1001, 1001];
        for (int j = 0; j < k; j++)
        {
            var attack = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            var left = attack[0] + offset;
            var top = attack[1] + offset;
            var right = left + attack[2] + 1;
            right = Math.Min(1000, right);
            var bottom = top + attack[3] + 1;
            bottom = Math.Min(1000, bottom);
            for (int y = top; y < bottom; y++)
            {
                attacks[left, y] += attack[4];
                if (right == 1000)
                {
                    if (y < 1000)
                    {
                        attacks[0, y + 1] -= attack[4];                        
                    }
                }
                else
                {
                    attacks[right, y] -= attack[4];
                }
            }
        }
        long current = 0;
        long sum = 0;
        for (int y = 0; y < 1001; y++)
        {
            for (int x = 0; x < 1001; x++)
            {
                current += attacks[x, y];
                if (current < enemies[x, y])
                {
                    sum += enemies[x, y] - current;
                }
            }
        }
        Console.WriteLine(sum);
    }
}