import sys
input=lambda: sys.stdin.readline().rstrip()
n,m=map(int,input().split())
S=[[int(i) for i in input().split()] for _ in range(m)]
ans=0
import itertools
for P in itertools.permutations(range(n)):
  D=dict()
  for i in range(n):
    D[P[i]]=i
  score=0
  for a,b,c in S:
    if D[a]<D[b]:
      score+=c
  ans=max(ans,score)
print(ans)