from itertools import permutations

n,m=map(int,input().split())
items=[[0]*n for _ in range(n)]
for _ in range(m):
    item1,item2,score=map(int,input().split())
    item1,item2=item1-1,item2-1
    items[item1][item2]=score

ans=0
for P in permutations(range(n)):
    tmp=0
    for i in range(n):
        for j in range(i):
            tmp+=items[P[j]][P[i]]

    ans=max(ans,tmp)

print(ans)