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()))
    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))

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 k, co in enumerate(permu):
    for i in range(N-1):
        for j in range(i + 1, N):
            score_table[k] = score_table[k] + score_book[co[i]][co[j]]
        i += i

print(max(score_table))