from itertools import permutations
N,M = map(int,input().split())
L = [list(map(int,input().split())) for _ in range(M)]
item1,item2,score = [list(i) for i in zip(*L)]
L = [i for i in range(N)]
L = list(permutations(L, N))
ans = 0
for i in range(len(L)):
    P = L[i]
    memo = {}
    for k in range(N):
        memo[P[k]] = k
    cnt = 0
    for k in range(M):
        if memo[item1[k]] < memo[item2[k]]:
            cnt += score[k]
    ans = max(ans, cnt)
print(ans)