from collections import defaultdict
N, M = map(int, input().split())
points = defaultdict(list)
for _ in range(M):
    a, b, c = map(int, input().split())
    points[a].append((b, c))

ans = 0
def dfs(arr, score):
  if len(arr) == N:
    global ans
    ans = max(ans, score)
    return

  for j in range(N):
    if j in arr:
      continue

    val = 0
    for b, c in points[j]:
      if b not in arr:
        val += c
    dfs(arr + [j], score + val)

dfs([], 0)
print(ans)