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 aa, bb, cc in zip(a,b,c):
  mat[aa][bb]+=cc

ans=0
for perm in permutations(range(n)):
  tans=0
  for i in range(n):
    for j in range(i):
      tans+=mat[perm[i]][perm[j]]
  ans=max(ans,tans)
print(ans)