N, M = map(int, input().split())
item1 = [0] * M
item2 = [0] * M
score = [0] * M
max_score = 0
sheat = []

for p in range(N):
    l = []
    for q in range(N):
        l.append(0)
    sheat.append(l)

for i in range(M):
    item1[i], item2[i], score[i] = map(int, input().split())
    sheat[item1[i]][item2[i]] = score[i]

dic = {}
tup = tuple()
for i in range(N):
    tup += ((i,),)
    dic[(i,)] = 0
new_tup = tup

for i in range(1, N):
    tup = new_tup
    new_tup = tuple()
    for tu in tup:
        for k in range(N):
            if not (k in tu):
                temp = tu + (k,)
                dic[temp] = dic[tu]
                for c in tu:
                    dic[temp] += sheat[c][k]
                new_tup += (temp,)

print(dic[max(dic)])