from itertools import permutations
n, m = map(int, input().split())
value = [[0]*(n+1) for _ in range(n+1)]

for i in range(m):
    a, b, c = map(int, input().split())
    value[a][b] = c
ans = 0
for s in permutations(range(n), n):
    num = 0
    for i in range(n-1):
        for j in range(i+1, n):
            num += value[s[i]][s[j]]
    ans = max(ans, num)

print(ans)