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