package main

import (
	"fmt"
	"strconv"
)

func scan() (N int, M int, scoreMap map[string]int) {
	scoreMap = map[string]int{}
	fmt.Scan(&N, &M)
	for i := 0; i < M; i++ {
		var item1, item2 string
		var score int
		fmt.Scan(&item1, &item2, &score)
		key := item1 + "," + item2
		scoreMap[key] = score
	}
	return
}

func permutaions(arr []int) (res [][]int) {
	var helper func([]int, int)

	helper = func(arr []int, n int) {
		if n == 1 {
			tmp := make([]int, len(arr))
			copy(tmp, arr)
			res = append(res, tmp)
		} else {
			for i := 0; i < n; i++ {
				helper(arr, n-1)
				if n%2 == 1 {
					tmp := arr[i]
					arr[i] = arr[n-1]
					arr[n-1] = tmp
				} else {
					tmp := arr[0]
					arr[0] = arr[n-1]
					arr[n-1] = tmp
				}
			}
		}
	}

	helper(arr, len(arr))
	return res
}

func main() {
	N, _, scoreMap := scan()
	// N, _, scoreMap := 4, 9, map[string]int{
	// 	"0,1": 1,
	// 	"0,2": 2,
	// 	"0,3": 3,
	// 	"1,2": 4,
	// 	"1,3": 5,
	// 	"2,3": 6,
	// 	"3,2": 100,
	// 	"2,1": 100,
	// 	"1,0": 100,
	// }

	var items []int
	for i := 0; i < N; i++ {
		items = append(items, i)
	}
	perms := permutaions(items)

	var maxScore int
	for _, per := range perms {
		tmpMaxScore := 0
		for i := 1; i < len(per); i++ {
			key := strconv.Itoa(per[i-1]) + "," + strconv.Itoa(per[i])
			tmpMaxScore += scoreMap[key]
		}
		if tmpMaxScore > maxScore {
			maxScore = tmpMaxScore
		}
	}

	fmt.Print(maxScore)
}