#!/usr/bin/env python2.7

import sys
import itertools

def read_n():
    return map(int,raw_input().strip().split(" "))

def compute(arr, N):
    result = 0
    for pat in itertools.permutations(range(0, N)):
        total = 0
        for i in range(0, N - 1):
            for j in range(i + 1, N):
                total += arr[pat[i]][pat[j]]
        result = max([total, result])

    return result

def compute2(scores, left, right):
    res = 0

    for r in right:
        right2 = list(right)
        left2 = list(left)

        right2.remove(r)
        left2.append(r)
        childScore = compute2(scores, left2, right2)
        score = reduce(lambda a,l: a + scores[l][r], left, 0)
        res = max([score + childScore, res])

    return res

(N, M) = read_n()

arr = [[0 for y in range(0, N)]  for x in range(0,N)]
for i in range(0,M):
    (i1, i2, val) = read_n()
    arr[i1][i2] = val


#print compute(arr, N)
print compute2(arr, [], range(0, N))