import itertools

n,m = map(int,input().split())
a = []
for i in range(m):
	temp = list(map(int,input().split()))
	a.append(temp)

seq = []
for i in range(n):
	seq.append(i)
c = list(itertools.permutations(seq))
score = []
k = len(c)
for p in range(k):
	total = 0
	for i in range(m):
		if c[p].index(a[i][0]) < c[p].index(a[i][1]):
			total += a[i][2]
	score.append(total)
print(max(score))