N, M = map(int, input().split())

tab = []
for i in range(M):
    tab.append(list(map(int, input().split())))


def calc(x):
    ans = 0
    for row in tab:
        if all(c in x for c in row[:2]):
            if x.index(row[0]) < x.index(row[1]):
                ans += row[2]
    return ans


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

mx = 0
for i in range(a):
    lst = []
    x = i
    for j in range(N, 0, -1):
        x, m = divmod(x, j)
        lst.append(m)
    cdt = calc(lst)
    if cdt > mx:
        mx = cdt
print(mx)