N,M = map(int,input().split())
iis = [tuple(map(int,input().split())) for _ in range(M)]

from itertools import permutations
ans = 0
for p in permutations([i for i in range(N)]):
    tmp = 0
    for i1,i2,s in iis:
        if p[i1-1] < p[i2-1]:
           tmp += s
    ans = max(ans,tmp)
print(ans)