#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using mint = modint998244353;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, q;
  cin >> n >> q;
  dsu d(2 * n);
  rep(_, q) {
    int a, b, c;
    cin >> a >> b >> c;
    a--, b--;
    if (c == 0) {
      d.merge(a, b);
      d.merge(n + a, n + b);
    } else {
      d.merge(a, n + b);
      d.merge(n + a, b);
    }
  }
  bool ok = true;
  rep(i, n) ok &= !d.same(i, n + i);
  if (!ok) {
    cout << 0 << '\n';
  } else {
    mint ans = mint(2).pow(d.groups().size() / 2);
    cout << ans.val() << '\n';
  }
}