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

import itertools as iter

N, M = map(int, input().split())
item_score = []
for i in range(M):
    item_score.append(list(map(int, input().split())))

# 全通りの品物列を作成
items = []
for i in range(N):
    items.append(i)
sequences = list(iter.permutations(items))

# すべての品物列についてスコアを算出し，最大値を記録する
max_score = -1
for seq in sequences:
    seq_score = 0
    for check in item_score:
        item_1 = check[0]
        item_2 = check[1]
        score = check[2]
        pos_1 = seq.index(item_1)
        pos_2 = seq.index(item_2)
        if pos_1 < pos_2:
            seq_score += score
    max_score = max(max_score, seq_score)

print(max_score)