#coding:utf-8
#http://yukicoder.me/submissions/5262 のPyPyによる性能評価です。

import itertools
N,M = map(int,raw_input().split())
line = [map(int,raw_input().split()) for _ in range(M)]
dic = {i:{}for i in range(N)}
for i,j,k in line: dic[i][j] = k
ans = 0
for ele in itertools.permutations(range(N)):
    ans = max(ans,sum(dic[ele[i]][j] for i in range(N-1) for j in set(dic[ele[i]].keys())&set(ele[i+1:])))
print ans