import sys
read=sys.stdin.buffer.read
readline=sys.stdin.buffer.readline

from itertools import permutations
n,m=map(int,readline().split())
m=map(int,read().split())
mat=[[0 for _ in range(n)] for _ in range(n)]
a,b,c=zip(*zip(m,m,m))
for a, b, c in zip(a,b,c):
  mat[a][b]+=c

ans=0
for perm in permutations(range(n)):
  tans=0
  for x,y in zip(perm,perm[1:]):
    tans+=mat[x][y]
  ans=max(ans,tans)
print(ans)