package main

import (
	"fmt"
)

func main() {
	type Score struct {
		i1, i2, s int
	}

	var n, m, i1, i2, s int
	_, _ = fmt.Scan(&n, &m)

	scores := make(map[int]Score)
	for i := 0; i < m; i++ {
		_, _ = fmt.Scan(&i1, &i2, &s)
		scores[i1*10+i2] = Score{i1, i2, s}
	}

	list := []int{0}
	total := 0
	for i := 1; i < n; i++ { // 入れる数字
		max := 0
		maxJ := 0
		for j := 0; j <= len(list); j++ { // 入れる位置
			score := 0

			for k := 0; k < len(list); k++ { // 入れた場合に得られるスコア計算
				if k < j {
					score += scores[list[k]*10+i].s
				} else {
					score += scores[i*10+list[k]].s
				}
			}

			if max < score {
				max = score
				maxJ = j
			}
		}

		fmt.Println(list, i, max, maxJ, total)
		total += max
		switch maxJ {
		case 0:
			list = append([]int{i}, list...)
		case len(list):
			list = append(list, i)
		default:
			list = append(list[:maxJ-1], append([]int{i}, list[maxJ:]...)...)
		}
	}

	fmt.Println(total)
}