N,M = map(int,input().split())
score = [[0]*N for i in range(N)]

for j in range(M):
	item1,item2,s = map(int,input().split())
	score[item2][item1] = s

ans = 0
	
def tokuten(n,used,count):
	global ans 
	if (len(n) == N):
		ans = max(ans,count)
		return
	
	for item in range(N):
		if (used[item] == True):
			continue
		else:
			add = 0
			for mae in n:
				add += score[item][mae]
				
			used[item] = True
			tokuten(n + [item], used, count + add)
			used[item] = False

used = [False] * N
tokuten([],used,0)
print(ans)