from itertools import permutations
from sys import stdin, stdout

input = lambda: stdin.readline()
write = stdout.write

def main():
    N, M = map(int, input().split())
    I = [tuple(map(int, input().split())) for _ in range(M)]

    table = [[0] * N for _ in [0] * N]
    for i1, i2, s in I:
        table[i1][i2] = s

    def calc(n):
        ret = 0
        for i in range(N - 1):
            for j in range(i + 1, N):
                ret += table[n[i]][n[j]]
        return ret

    score = 0
    for n in permutations(range(N)):
        ret = calc(n)
        score = max(score, ret)
    print(score)

main()