import sys
import itertools
#input = sys.stdin.readline
N, M = map(int,input().split())
listN = [i for i in range(N)]
#scores = [[] for _ in range(M)]
scores = [[ 0for __ in range(N)] for _ in range(N)]
for i in range(M):
    a,b,sc = map(int,input().split())
    #scores[i] = [a,b,sc]
    scores[a][b] = sc
ans = 0
for t in itertools.permutations(listN):
    score = 0
    for i in range(N-1):
        for j in range(i+1,N):
            score += scores[t[i]][t[j]]
        # for s in scores:
        #     for j in range(i+1,N):
        #         if t[i] == s[0] and t[j] == s[1]:
        #                 score += s[2]
        #                 break
        #         elif s[0] > t[i]:
        #             break
    ans = max(ans,score)
print(ans)