from itertools import permutations

N, M = map(int, input().split())
A = [list(map(int, input().split())) for _ in range(M)]

ans = 0
for p in permutations(range(N)):
    score = 0
    d = [0] * N
    for i, v in enumerate(p):
        d[v] = i
    for i in range(M):
        x, y, z = A[i]
        if d[x] < d[y]:
            score += z
    ans = max(ans, score)

print(ans)