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


X = 1
for i in range(N):
    X *= i + 1

mx = 0
for i in range(X):
    mst = [c for c in range(N)]
    cdt = [None] * N
    x = i
    for j in range(N):
        x, m = divmod(x, len(mst))
        cdt[j] = mst.pop(m)
    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)