import itertools

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()))
    score_book[i][j] = k

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

#全通りのスコアを入れる配列を作る
score_table = 0
for co in permu:
    A = 0
    for i in co:
        for j in range(i + 1, N):
            A += + score_book[co[i]][co[j]]
            #score_table[k] += + score_book[co[i]][co[j]]
    if score_table < A:
        score_table = A

print(score_table)