from itertools import permutations

n,m=map(int,input().split())
lis=[list(map(int,input().split())) for _ in range(m)]
ans=[]
for per in permutations(range(n)):
    tmp=0
    per=list(per)
    for x,y,point in lis:
        if per.index(x)>per.index(y):
            tmp+=point
    ans.append(tmp)
print(max(ans))