# coding: utf-8
# yukicoder No.90 品物の並び替え

from itertools import permutations
from itertools import combinations

def p_score(p, rule):
    score = 0
    
    for i in combinations(p, 2):
        for c in rule:
            if list(i) == c[:2]:
                score += c[2]
                break
            
    return score

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

rule = [[int(i) for i in input().split()] for _ in range(M)]
max_score = -1

# 総当たり
for p in permutations(range(N)):
    score = p_score(p, rule)
    
    if score > max_score:
        max_score = score

print(max_score)