package main

import (
	"bufio"
	"os"
	"strconv"
	"fmt"
)

func main() {
	sc := NewScanner()
	N := sc.NextInt()
	M := sc.NextInt()
	data := make([][]int, M * 3)
	for i := 0; i < M; i++ {
		data[i] = make([]int, 3)
		for j := 0; j < 3; j++ {
			data[i][j] = sc.NextInt()
		}
	}

	nums := xrange(N)
	mx := 0
	for {
		total := 0

		for i := 0; i < M; i++ {
			index1 := -1
			index2 := -1
			for j := 0; j < N; j++ {
				if nums[j] == data[i][0] {
					index1 = j
				}
				if nums[j] == data[i][1] {
					index2 = j
				}
			}
			if index1 < index2 {
				total += data[i][2]
			}
		}
		mx = max(mx, total)
		if !next_permutation(nums) {
			break
		}

	}
	fmt.Println(mx)
}

type Scanner struct {
	r   *bufio.Reader
	buf []byte
	p   int
}

func NewScanner() *Scanner {
	rdr := bufio.NewReaderSize(os.Stdin, 1000)
	return &Scanner{r:rdr}
}
func (s *Scanner) Next() string {
	s.pre()
	start := s.p
	for ; s.p < len(s.buf); s.p++ {
		if s.buf[s.p] == ' ' {
			break
		}
	}
	result := string(s.buf[start:s.p])
	s.p++
	return result
}
func (s *Scanner) NextLine() string {
	s.pre()
	start := s.p
	s.p = len(s.buf)
	return string(s.buf[start:])
}
func (s *Scanner) NextInt() int {
	v, _ := strconv.Atoi(s.Next())
	return v
}
func (s *Scanner) NextInt64() int64 {
	v, _ := strconv.ParseInt(s.Next(), 10, 64)
	return v
}

func (s *Scanner) NextIntArray() []int {
	s.pre()
	start := s.p
	result := []int{}
	for ; s.p < len(s.buf) + 1; s.p++ {
		if s.p == len(s.buf) || s.buf[s.p] == ' ' {
			v, _ := strconv.ParseInt(string(s.buf[start:s.p]), 10, 0)
			result = append(result, int(v))
			start = s.p + 1
		}
	}

	return result
}
func (s *Scanner) NextInt64Array() []int64 {
	s.pre()
	start := s.p
	result := []int64{}
	for ; s.p < len(s.buf) + 1; s.p++ {
		if s.p == len(s.buf) || s.buf[s.p] == ' ' {
			v, _ := strconv.ParseInt(string(s.buf[start:s.p]), 10, 64)
			result = append(result, v)
			start = s.p + 1
		}
	}
	return result
}

func (s *Scanner) NextMap() map[int]bool {
	s.pre()
	start := s.p
	mp := map[int]bool{}
	for ; s.p < len(s.buf); s.p++ {
		if s.buf[s.p] == ' ' {
			v, _ := strconv.Atoi(string(s.buf[start:s.p]))
			mp[v] = true
			start = s.p + 1
		}
	}
	v, _ := strconv.Atoi(string(s.buf[start:s.p]))
	mp[v] = true

	return mp
}

func (s *Scanner) pre() {
	if s.p >= len(s.buf) {
		s.readLine()
		s.p = 0
	}
}
func (s *Scanner) readLine() {
	s.buf = make([]byte, 0)
	for {
		l, p, e := s.r.ReadLine()
		if e != nil {
			panic(e)
		}
		s.buf = append(s.buf, l...)
		if !p {
			break
		}
	}
}

func next_permutation(a []int) bool {
	for i := len(a) - 2; i >= 0; i-- {
		if a[i] < a[i + 1] {
			for j := len(a) - 1; j >= 0; j-- {
				if a[j] >= a[i] {
					a[i], a[j] = a[j], a[i]
					reverse(a, i + 1, len(a) - (i + 1))
					return true
				}
			}
		}
	}
	reverse(a, 0, len(a))

	return false
}
func reverse(a []int, start int, length int) {
	var end = start + length - 1
	for start < end {
		a[start], a[end] = a[end], a[start]
		start++
		end--
	}
}

func xrange(N int) []int {
	data := make([]int, N)
	for i := 0; i < N; i++ {
		data[i] = i
	}
	return data
}
func max(a int, b int) int {
	if a < b {
		return b
	}
	return a
}