import sequtils,strutils,algorithm
var
    N, M, a, b, c: int
    hyou : array[16, array[16, int]]
    s : int
    ans : int
    dp : array[16, array[(1 shl 16), int]]
(N, M) = stdin.readline.split.map(parseInt)

for i in 0..<N:
    for j in 0..<N:
        hyou[i][j] = -100000000
for i in 0..<M:
    (a, b, c) = stdin.readline.split.map(parseInt)
    a -= 1
    b -= 1
    hyou[a][b] = max(hyou[a][b], c)
    hyou[b][a] = max(hyou[b][a], c)
    
for B in 0..<(1 shl N):
    for s in 0..<N:
        if B == 0:
            for k in 0..<N:
                var nb = ((1 shl s) or (1 shl k))
                dp[s][nb] = hyou[s][k]
                dp[k][nb] = hyou[k][s]
                ans = max(ans, hyou[s][k])
        if (B and (1 shl s)) > 0:
            for k in 0..<N:
                if (B and (1 shl k)) > 0:
                    continue
                var nb = ((1 shl k) or B)
                if hyou[s][k] > 0:
                    dp[k][nb] = max(dp[k][nb], dp[s][B] + hyou[s][k])
                    ans = max(dp[k][nb], ans)
echo ans