N,M=gets.split.map(&:to_i)

S=Array.new(N).map{Array.new(N,0)}
M.times do
    i1,i2,s=gets.split.map(&:to_i)
    S[i1][i2]=s
end

ans=0
(0...N).to_a.permutation do |p|
    cnt=0
    for i in 0...N-1 do
        for j in i+1...N do
            break if j>=N
            cnt+=S[p[i]][p[j]]
        end
    end
    ans=cnt if ans<cnt
end

puts ans