import java.util.Arrays;
import java.util.Scanner;

/**
 * yukicoder no.60 魔法少女 
 * @author scache
 *
 */
public class Main60 {
	public static void main(String[] args) {
		Main60 p = new Main60();
	}

	public Main60() {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int k = sc.nextInt();
		int[] x = new int[n];
		int[] y = new int[n];
		int[] hp =new int[n];
		for(int i=0;i<n;i++){
			x[i] = sc.nextInt()+500;
			y[i] = sc.nextInt()+500;
			hp[i] = sc.nextInt();
		}
		
		solve(n, k, x, y, hp, sc);
	}

	private final int MAX_W =1001;
	private final int MAX_H =1001;
	public void solve(int n, int k, int[] x, int[] y, int[] hp, Scanner sc) {
		int[][] field = new int[MAX_W][MAX_H];
		for(int i=0;i<k;i++){
			int ax = sc.nextInt()+500;
			int ay = sc.nextInt()+500;
			int w = sc.nextInt()+1;
			int h = sc.nextInt()+1;
			int d = sc.nextInt();
			
			field[ax][ay] += d;
			if(ax+w < MAX_W && ay+h < MAX_H)
				field[ax+w][ay+h] += d;
			if(ax+w < MAX_W)
				field[ax+w][ay] -= d;
			if(ay+h < MAX_H)
				field[ax][ay+h] -= d;
		}
		
		for(int i=0;i<MAX_W-1;i++){
			for(int j=0;j<MAX_H;j++){
				field[i+1][j] += field[i][j];
			}
		}
		
		for(int i=0;i<MAX_W;i++){
			for(int j=0;j<MAX_H-1;j++){
				field[i][j+1] += field[i][j];
			}
		}
		
		int res = 0;
		for(int i=0;i<x.length;i++){
			res += Math.max(0, hp[i]-field[x[i]][y[i]]);
		}
		
		
		System.out.println(res);
		
		
	}

	
}