object Main {
    def main(args: Array[String]): Unit = {
        val scanner = new java.util.Scanner(System.in)
        val n = scanner.nextInt
        val m = scanner.nextInt
        var table = Array.ofDim[Int](n, n)
        for (i <- 1 to m) {
            var item1 = scanner.nextInt
            var item2 = scanner.nextInt
            var score = scanner.nextInt
            table(item1)(item2) = score
        }
        var answer: Int = 0
        for (items <- (0 until n).permutations){
            var idxs = (0 until n).map(items.indexOf(_)).toList
            var current_sum: Int = 0
            for (item1 <- 0 until n; item2 <- 0 until n){
                if (idxs(item1) < idxs(item2)) {
                    current_sum += table(item1)(item2)
                }
            answer = scala.math.max(answer, current_sum)
            }
        }
        println(answer)
    }
}