#品物の並び替え

def alllist(text , num_list):
    if len(num_list) == 1:
        text += str(num_list[0])
        all_list.append(text)
    else:
        for i in num_list:
            text2 = text + str(i)
            copy = num_list.copy()
            copy.remove(i)
            alllist(text2 , copy)


N , M = map(int , input().split())

score = []
for i in range(M):
    score.append(list(map(int , input().split())))

all_list = []
r = [i for i in range(N)]

alllist("" , r)

total = 0

for t in all_list:
    sum = 0
    for s in score:
        if t.find(str(s[0])) < t.find(str(s[1])):
            sum += s[2]
    total = max(total , sum)

print(total)