import itertools
N,M = map(int,raw_input().split())
line = [map(int,raw_input().split()) for _ in range(M)]
dic = {i:{} for i in range(N)}
for i,j,k in line: dic[i][j] = k
ans = 0
for ele in itertools.permutations(range(N)):
    tmp = 0
    for i in range(N-1):
        for j in range(i+1,N):
            try:
                tmp += dic[ele[i]][ele[j]] 
            except:
                pass
    ans = max(ans,tmp)
print ans