from copy import deepcopy

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

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]


def dp(check):
    if len(check) == 0:
        return 0
    elif len(check) == 1:
        return 0
    else:
        tempmax = 0
        for i in check:
            temp = deepcopy(check)
            temp.remove(i)
            temp2 = 0
            for p in temp:
                temp2 += sheat[p][i]
            temp2 += dp(temp)
            if tempmax < temp2:
                tempmax = temp2
        return tempmax


l = [i for i in range(N)]

print(dp(l))