//https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 より
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};
    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };
    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };
    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };
    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };
    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}

// ここまで

use std::cmp::max;

fn run() {
    input! {
        n: usize,
        m: usize,
        e: [(usize1, usize1, u32); m],
    }
    let mut g = vec![vec![0; n]; n];
    for (a, b, c) in e {
        g[a][b] = max(g[a][b], c);
        g[b][a] = max(g[b][a], c);
    }
    let mut dp = vec![vec![0; 1 << n]; n];
    for j in 1..(1 << n) {
        for i in 0..n {
            if (j >> i) & 1 == 0 {
                continue;
            }
            let mut local = 0;
            let bit = j ^ (1 << i);
            for k in 0..n {
                if (bit >> k) & 1 == 1 && g[i][k] > 0 {
                    let v = dp[k][bit] + g[i][k];
                    local = max(local, v);
                }
            }
            dp[i][j] = local;
        }
    }
    let mut ans = 0;
    for i in 0..n {
        ans = max(ans, dp[i][(1 << n) - 1]);
    }
    println!("{}", ans);
}

fn main() {
    run();
}