import itertools

def main():
    N, M = map(int, input().split())
    gen = (map(int, input().split()) for _ in range(M))
    x = {str(k1) + str(k2): v for k1, k2, v in gen}

    score = 0
    for i in itertools.permutations(range(N)):
        lineup = ''.join(map(str, i))
        score_ = 0
        for k, v in x.items():
            if k in lineup:
                score_ += v
        score = max(score, score_)

    print(score)

main()