import sys
import itertools

def resolve(in_):
    N, M = map(int, next(in_).split())

    scores = [[0] * N for _ in range(N)]
    for item1, item2, score in (map(int, line.split()) for line in itertools.islice(in_, M)):
        scores[item1][item2] = score

    ans = 0
    for _items in itertools.permutations(range(N)):
        temp = 0
        for i, item1 in enumerate(_items, 1):
            for item2 in _items[i:]:
                temp += scores[item1][item2]
            ans = max(ans, temp)
    return ans
    

def main():
    ans = resolve(sys.stdin.buffer)

    print(ans)


if __name__ == '__main__':
    main()