#include <bits/stdc++.h>
using namespace std;
#include <atcoder/modint>
using namespace atcoder;
using mint = modint998244353;

int main()
{
  int N, Q;
  cin >> N >> Q;
  vector<vector<pair<int, int>>> G(N);
  for (int i = 0; i < Q; i++)
  {
    int a, b, c;
    cin >> a >> b >> c;
    a--, b--;
    G.at(a).push_back({b, c});
    G.at(b).push_back({a, c});
  }

  mint ans = 1;
  vector<int> colors(N, -1);  // -1: 未決定、0: 正直者、1: 嘘つき
  auto dfs = [&](auto self, int v) -> void
  {
    for (auto [nv, d] : G.at(v))
    {
      int new_color = colors.at(v) ^ d;
      if (colors.at(nv) == -1)
      {
        colors.at(nv) = new_color;
        self(self, nv);
      }
      else if (colors.at(nv) != new_color)  // 矛盾したら 0
        ans *= 0;
    }
  };
  for (int v = 0; v < N; v++)
  {
    if (colors.at(v) == -1)
    {
      ans *= 2;
      colors.at(v) = 0;
      dfs(dfs, v);
    }
  }
  cout << ans.val() << endl;
}