import itertools
import sys
readline=sys.stdin.readline

N,M=map(int,readline().split())
score=[tuple(map(int,readline().split())) for m in range(M)]
ans=0
for tpl in itertools.permutations([i for i in range(N)]):
    S=0
    for i,j,s in score:
        if tpl[i]<tpl[j]:
            S+=s
    ans=max(ans,S)
print(ans)