use std::io::Read;

fn main() {
    let mut buf = String::new();
    let mut stdin = std::io::stdin();
    stdin.read_to_string(&mut buf).unwrap();
    
    let mut iter = buf.split_whitespace();
    
    let n: usize = iter.next().unwrap().parse().unwrap();
    let m: usize = iter.next().unwrap().parse().unwrap();
    
    let mut board: Vec<Vec<usize>> = vec![vec![0; n]; n];
    let mut row: usize = 0;
    
    while row < m {
        let front: usize = iter.next().unwrap().parse().unwrap();
        let back: usize = iter.next().unwrap().parse().unwrap();
        let score: usize = iter.next().unwrap().parse().unwrap();
        board[front][back] = score;
        row += 1;
    }
    
    let mut max: usize = 0;
    for perm in permutation(n) {
        let mut total_score: usize = 0;
        let mut is_set: Vec<bool> = vec![false; n];
        for num in perm {
            for b in (0..n).filter(|&b| !is_set[b]) {
                total_score += board[num][b];
            }
            is_set[num] = true;
        }
        if  total_score > max {
            max = total_score;
        }
    }
    
    println!("{}", max);
}

fn permutation(n: usize) -> Vec<Vec<usize>> {
    if n == 1 {
        return vec![vec![0]]
    }
    let mut vec: Vec<Vec<usize>> = Vec::new();
    for p in permutation(n-1).iter_mut() {
        p.push(n-1);
        vec.push(p.clone());
        for i in (1..n).rev() {
            p.swap(i, i-1);
            vec.push(p.clone());
        }
    }
    vec
}