import itertools

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

def matrix():
    table = []
    for _ in range(n):
        table += [[0] * n]
    for _ in range(m):
        item1, item2, score = [int(x) for x in input().split()]
        # スコア表作成
        table[item1][item2] = score

    return table

def resolve(table):
    max_score = 0
    for val in itertools.permutations(range(n)): #順列を生成する
        score = 0
        for i in range(1, len(val)):
            for j in range(0, i):
                # スコア表に沿って得点を追加していく
                score += table[val[j]][val[i]]
        # 比較して大きい得点を格納
        max_score = max(score, max_score)
    return max_score


def main():
    table = matrix()
    max_score = resolve(table)
    print(max_score)

if __name__ == "__main__":
    main()