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

(n, m) = [int(i) for i in input().rstrip().split(" ")]

map = {}

for i in range(m):
    (item1, item2, score) = [int(i) for i in input().rstrip().split(" ")]
    if item1 not in map.keys():
        map[item1] = {}
    map[item1][item2] = score


def get_ans(*items):
    if len(items) >= n:
        return calc(items)
    total_score = 0
    for i in range(0, n):
        if i in items:
            continue
        ret = get_ans(*items, i)
        total_score = max(ret, total_score)
    return total_score


def calc(items):
    total = 0
    for i in range(len(items) - 1):
        if items[i] not in map.keys():
            continue
        for j in range(i + 1, len(items)):
            if items[j] not in map[items[i]].keys():
                continue
            total += map[items[i]][items[j]]
    return total


ans = max([get_ans(i) for i in range(0, n)])
print(ans)