use std::io::*;

fn main() {
    const m: usize = 1002;
    const offset: isize = 500;
    let mut stg = vec![vec![0; m]; m];

    let mut s = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();

    let n: usize = itr.next().unwrap().parse().unwrap();
    let k: usize = itr.next().unwrap().parse().unwrap();
    
    let mut mons = Vec::<(isize, isize, isize)>::new();
    for _ in 0..n {
        mons.push((
            itr.next().unwrap().parse().unwrap(),
            itr.next().unwrap().parse().unwrap(),
            itr.next().unwrap().parse().unwrap()
            ));
    } 

    let mut att = Vec::<(isize, isize, usize, usize, isize)>::new();
    for _ in 0..k {
        att.push((
            itr.next().unwrap().parse().unwrap(),
            itr.next().unwrap().parse().unwrap(),
            itr.next().unwrap().parse().unwrap(),
            itr.next().unwrap().parse().unwrap(),
            itr.next().unwrap().parse().unwrap(),
            ));
    }

    for t in att {
        let x = (t.0 + offset) as usize;
        let y = (t.1 + offset) as usize;
        let xw = std::cmp::min(x + t.2 + 1, m - 1);
        let yh = std::cmp::min(y + t.3 + 1, m - 1);
        let d = t.4;
        stg[x][y] += d;
        stg[xw][y] -= d;
        stg[x][yh] -= d;
        stg[xw][yh] += d;
    }

    for i in 0..m {
        for j in 1..m { stg[i][j] += stg[i][j - 1]; }
    }

    for i in 1..m {
        for j in 0..m { stg[i][j] += stg[i - 1][j]; }
    }

    let mut ans = 0;
    for t in mons {
        let x = (t.0 + offset) as usize;
        let y = (t.1 + offset) as usize;
        let h = t.2;
        ans += std::cmp::max(h - stg[x][y], 0);
    }

    println!("{}", ans);

}