n, m = gets.chomp.split.map(&:to_i)
ss = Array.new(n){Array.new(n, 0)}
ans = 0
m.times do
  i1, i2, s = gets.chomp.split.map(&:to_i)
  ss[i1][i2] = s
end

(0...n - 1).to_a.permutation do |ps|
  ps << n - 1
  tmp = 0
  for i in 0...n - 1
    for j in i + 1...n
      tmp += ss[ps[i]][ps[j]]
    end
  end
  ans = [ans, tmp].max
  for i in 0...n - 1
    for j in 1...n
      tmp -= ss[ps[i]][ps[(i + j) % n]]
      tmp += ss[ps[(i + j) % n]][ps[i]]
    end
    ans = [ans, tmp].max
  end
end

puts ans