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。
combi = 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 i in range(len(combi))]

for i in range(len(combi)): 
    for j in range(N - 1):
        for m in range(M):
            if combi[i][j] == item1[m]:
                for k in range(j + 1, N):
                    if combi[i][k] == item2[m]:
                        score_table[i] = score_table[i] + score_book[item1[m]][item2[m]]

print(max(score_table))