N, M = map(int, input().split())
score = [[0] * N for i in range(N)]
for i in range(M):
    a, b, s = map(int, input().split())
    score[a][b] += s
from itertools import permutations
l = [i for i in range(N)]
ans = 0
for p in permutations(l):
    p = list(p)
    s = 0
    for i in range(N):
        for j in range(i + 1, N):
            s += score[p[i]][p[j]]
    ans = max(ans, s)
print(ans)