from itertools import permutations

n, m = map(int, input().split())
C = [[-1 for _ in range(n)] for _ in range(n)]
for _ in range(m):
    i, j, c = map(int, input().split())
    C[i][j] = c

ans = 0
for P in permutations(range(n)):
    res = 0
    for i in range(n - 1):
        pi = P[i]
        for j in range(i + 1, n):
            pj = P[j]
            if C[pi][pj] != -1:
                res += C[pi][pj]
    ans = max(ans, res)
print(ans)