import sugar, strutils
from algorithm import nextPermutation


proc nextString: string =
  result = ""
  while not endOfFile stdin:
    let nextChar = readChar stdin
    case nextChar
    of '\r':
      discard
    of "\n"[0], ' ':
      break
    else:
      add result, nextChar


proc nextInt: int =
  parseInt nextString()


let
  n, m = nextInt()

var
  scoreList = newSeq[tuple[item1, item2, score: int]](m)
  ans = 0


proc main: void =
  for i in 0 ..< m:
    scoreList[i] = (nextInt(), nextInt(), nextInt())

  var items = lc[j | (j <- 0 ..< n), int]

  while true:
    var score = 0
    for i in 0 ..< m:
      if items[scoreList[i].item1] < items[scoreList[i].item2]:
        score += scoreList[i].score

    ans = max(ans, score)

    if not items.nextPermutation:
      break

  echo ans


when isMainModule:
  main()