from itertools import permutations
N, M = map(int, input().split())
S = []
for _ in range(M):
    s = list(map(int, input().split()))
    S.append(s)
A = [i for i in range(N)]
MAX = 0
for v in permutations(A):
    SUM = 0
    idx = [0] * N
    for a in A:
        idx[a] = v.index(a)
    for s in S:
        index1 = idx[s[0]]
        index2 = idx[s[1]]
        if index1 < index2:
            SUM += s[2]
    MAX = max(MAX, SUM)
print(MAX)