import itertools

N, M = map(int, input().split())
item1 = [0]*M
item2 = [0]*M
score = [0]*M
all_pattern = list(itertools.permutations(range(N))) # 順列
result = [0] * len(all_pattern)

for i in range(M):
    item1[i], item2[i], score[i] = map(int, input().split())

for i, pattern in enumerate(all_pattern):
    for k in range(M):
        sts = False
        for item in pattern:
            if item == item2[k] and not sts:
                break
            elif item == item1[k] and not sts:
                sts = True
            elif item == item2[k] and sts:
                result[i] += score[k]
                break

print(max(result))