import sys
from itertools import permutations

def input(): return sys.stdin.readline().strip()
def list2d(a, b, c): return [[c] * b for i in range(a)]
def list3d(a, b, c, d): return [[[d] * c for j in range(b)] for i in range(a)]
def list4d(a, b, c, d, e): return [[[[e] * d for j in range(c)] for j in range(b)] for i in range(a)]
def ceil(x, y=1): return int(-(-x // y))
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(N=None): return list(MAP()) if N is None else [INT() for i in range(N)]
def Yes(): print('Yes')
def No(): print('No')
def YES(): print('YES')
def NO(): print('NO')
sys.setrecursionlimit(10 ** 9)
INF = 10 ** 19
MOD = 10 ** 9 + 7
EPS = 10 ** -10

N, M = MAP()
A = []
for _ in range(M):
    a, b, c = MAP()
    A.append((a, b, c))

ans = 0
for perm in permutations(range(N)):
    pos = [0] * N
    for i, a in enumerate(perm):
        pos[a] = i
    score = 0
    for a, b, c in A:
        if pos[a] < pos[b]:
            score += c
    ans = max(ans, score)
print(ans)