from itertools import permutations
N,M = map(int,input().split())
A = [list(map(int,input().split())) for _ in range(M)]
ans = 0
for P in permutations(range(N)):
    Ind = [0]*N
    for i in range(N):
        Ind[P[i]] = i
    cnt = 0
    for j in range(M):
        a,b,c = A[j]
        if Ind[a]<Ind[b]:
            cnt += c
    ans = max(ans,cnt)
print(ans)