package yukicoder

fun main() {
    val (n, m) = readLine()!!.split(" ").map(String::toInt)
    val itemScores = (0 until m).map {
        val (item1, item2, score) = readLine()!!.split(" ").map(String::toInt)
        Triple(item1, item2, score)
    }

    fun getScore(items: IntArray): Int {
        var score = 0
        for (i in 0 until itemScores.size) {
            val item = itemScores[i]
            if (items.indexOf(item.first) < items.indexOf(item.second)) {
                score += item.third
            }
        }
        return score
    }

    fun getMaxScore(vararg items: Int): Int {
        return when (items.size >= n) {
            true -> getScore(items)
            false -> {
                var maxScore = 0
                for (i in 0..n) {
                    if (items.contains(i)) {
                        continue
                    }
                    val score = getMaxScore(*items, i)
                    if (maxScore < score) {
                        maxScore = score
                    }
                }
                maxScore
            }
        }
    }
    println(getMaxScore())
}