#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF (int)1e18
#define f first
#define s second

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());
const int N = 1e5 + 69;
const int mod = 998244353;
vector <pair<int, int>> adj[N];
int col[N];
bool vis[N];
int n, q;

void dfs(int u, int c){
    col[u] = c;
    vis[u] = true;
    for (auto [v, w] : adj[u]){
        if (!vis[v]){
            dfs(v, c ^ w);
        }
    }
}

void Solve() 
{
    cin >> n >> q;
    int ans = 1;
    for (int i = 1; i <= q; i++){
        int u, v, d; cin >> u >> v >> d;
        adj[u].push_back({v, d});
        adj[v].push_back({u, d});
    }
    
    for (int i = 1; i <= n; i++){
        if (!vis[i]){
            ans *= 2;
            ans %= mod;
            dfs(i, 0);
        }
    }
    
    for (int i = 1; i <= n; i++){
        for (auto [v, w]: adj[i]){
            if (col[v] ^ col[i] != w){
                cout << 0 << "\n";
                return;
            }
        }
    }
    
    cout << ans << "\n";
}

int32_t main() 
{
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;
   // cin >> t;
    for(int i = 1; i <= t; i++) 
    {
        //cout << "Case #" << i << ": ";
        Solve();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
   // cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
    return 0;
}