import itertools
N, M = map(int,input().split())
items = []
for i in range(1,M+1):
  items.append(list(map(int,input().split())))
max = 0
for v in list(itertools.permutations([x for x in range(N)])):
  sum = 0
  for item in items:
    if v.index(item[0]) < v.index(item[1]):
      sum += item[2]
  if max < sum:
    max = sum
print(max)