from itertools import permutations

N,M=map(int,input().split())
X=[0]*M
for i in range(M):
    x,y,a=map(int,input().split())
    X[i]=(x,y,a)

Max=-1
for U in permutations(range(N)):
    T=0
    for (x,y,a) in X:
        if U.index(x)<U.index(y):
            T+=a

    if T>Max:
        Max=T
print(Max)