from itertools import permutations as per
n,m=map(int,input().split())
ms=[list(map(int,input().split())) for i in range(m)]
ans=0
for p in per(range(n)):
    dic={}
    for i in range(n):
        dic[p[i]] = i
    point=0
    for j in range(m):
        a,b,c=ms[j]
        if dic[a] < dic[b]:
            point+=c
            
    ans=max(ans,point)
    
print(ans)