import itertools

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

tab = [[0] * N for _ in range(N)]
for _ in range(M):
    i1, i2, s = map(int, input().split())
    tab[i1][i2] = s


mx = 0
for cdt in itertools.permutations([c for c in range(N)]):
    sm = 0
    for j in range(N - 1):
        for k in range(j + 1, N):
            sm += tab[cdt[j]][cdt[k]]
    if sm > mx:
        mx = sm
print(mx)