def eval(arr, reg):
    score = 0
    for r in reg:
        i1 = arr.index(r[0])
        i2 = arr.index(r[1])
        if i1 < i2:
            score += r[2]
    return score

def make_arr(N):
    A = []
    def sub(arr, nums):
        if nums == set():
            A.append(arr)
        else:
            for i in nums:
                arr_ = arr.copy()
                arr_.append(i)
                sub(arr_, nums-{i})
    sub([], set([i for i in range(N)]))
    return A

def main():
    [N, M] = list(map(int, input().split()))
    reg = []
    for i in range(M):
        reg.append(list(map(int, input().split())))
    A = make_arr(N)
    res = [eval(a, reg) for a in A]
    print(max(res))

main()