# coding: utf-8
from itertools import permutations
from itertools import combinations

N, M = map(int, input().split())
item1 = []
item2 = []
score = []

score_dict = dict()

for __ in range(M):
    i1, i2, sc = map(int, input().split())
    score_dict[(i1, i2)] = sc

l_per = list(permutations(range(N)))
l_score = []
for per in l_per:
    a_score = 0
    for i in list(combinations(per, 2)):
        if i in score_dict:
            a_score += score_dict[i]
    l_score.append(a_score)

print(max(l_score))