# -*- coding: utf-8 -*-

N, M = map(int, raw_input().split())

l = []
for i in xrange(M):
    k = map(int, raw_input().split())
    l.append(k)

def score(m):
    score = 0
    for k in l:
        if m[k[0]] < m[k[1]]: score += k[2]
    return score

maxs = 0

def dp(l, m):
    if len(l) == 0:
        return score(m)
    mx = 0
    for i in xrange(len(l)):
        froml = list(l)
        tol = list(m)
        tol.append(froml.pop(i))
        c = dp(froml, tol)
        mx = max(mx, c)
    return mx

start = [i for i in xrange(N)]
print dp(start, [])