import itertools

def main():
    N, M = map(int,input().split())

    max_score = 0
    score = []

    for i in range(M):
        score.append(list(map(int,input().split())))

    data = list(itertools.permutations(range(N)))
    for tg in data:
        rt_score = check(list(tg), score)
        if max_score < rt_score:
            max_score = rt_score

    print(max_score)

def check(tg ,score ):
    rt_score = 0
    for sc in score:
        ind1 = tg.index(sc[0])
        if sc[1] in tg[ind1:]:
            rt_score += sc[2]

    return rt_score

if __name__ == "__main__":
    main()