import itertools

item1 = []
item2 = []

N, M = list(map(int, input().split()))

score_book = [[0 for i in range(N)] for j in range(N)]

for n in range(M):
    i, j, k = list(map(int, input().split()))
    item1.append(i)
    item2.append(j)
    score_book[item1[n]][item2[n]] = k

#全てのパターンを網羅する。
permu = list(itertools.permutations([i for i in range(N)], N))

combi_len = len(permu)
#全通りのスコアを入れる配列を作る
score_table = [0] * combi_len

for i, co in enumerate(permu):
    combi = list(itertools.combinations(co, 2))
    for j in combi:
        score_table[i] = score_table[i] + score_book[j[0]][j[1]]

print(max(score_table))