import std.algorithm, std.array, std.container, std.range;
import std.string, std.conv, std.bigint, std.math, std.random;
import std.stdio, std.typecons;

alias Tuple!(int, "i1", int, "i2", int, "sc") row;

void main()
{
  auto rd = readln.split.map!(to!int);
  auto n = rd[0];
  auto m = rd[1];
  auto tbl = iota(m).map!((_) {
    auto rd = readln.split.map!(to!int);
    return row(rd[0] - 1, rd[1] - 1, rd[2]);
  }).array;

  auto max = 0;
  foreach (ai; iota(n).permutations) {
    auto r = tbl.map!(row => ai.find(row.i1).length > ai.find(row.i2).length ? row.sc : 0).sum;
    if (r > max) max = r;
  }

  writeln(max);
}