#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <cmath>
#include <cassert>
#include <ctime>
#include <utility>
#include <random>
#include <tuple>
#include <bitset>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long ll;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repr(i, n) for (int i = (int)(n) - 1; i >= 0; i--)
#define repk(i, k, n) for (int i = k; i < (int)(n); i++)
#define all(v) v.begin(), v.end()
#define mod1 1000000007
#define mod2 998244353
#define mod3 100000007
#define vi vector<int>
#define vs vector<string>
#define vc vector<char>
#define vl vector<ll>
#define vb vector<bool>
#define vvi vector<vector<int>>
#define vvc vector<vector<char>>
#define vvl vector<vector<ll>>
#define vvb vector<vector<bool>>
#define vvvi vector<vector<vector<int>>>
#define vvvl vector<vector<vector<ll>>>
#define pii pair<int,int>
#define pil pair<int,ll>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define vpii vector<pair<int,int>>
#define vpll vector<pair<ll,ll>>
#define vvpii vector<vector<pair<int,int>>>
#define vvpll vector<vector<pair<ll,ll>>>

template<typename T> void debug(T e){
    cerr << e << endl;
}

template<typename T> void debug(vector<T> &v){
    rep(i, v.size()){
        cerr << v[i] << " ";
    }
    cerr << endl;
}

template<typename T> void debug(vector<vector<T>> &v){
    rep(i, v.size()){
        rep(j, v[i].size()){
            cerr << v[i][j] << " ";
        }
        cerr << endl;
    }
}

template<typename T> void debug(vector<pair<T, T>> &v){
    rep(i,v.size()){
        cerr << v[i].first << " " << v[i].second << endl;
    }
}

template<typename T> void debug(set<T> &st){
    for (auto itr = st.begin(); itr != st.end(); itr++){
        cerr << *itr << " ";
    }
    cerr << endl;
}

template<typename T> void debug(multiset<T> &ms){
    for (auto itr = ms.begin(); itr != ms.end(); itr++){
        cerr << *itr << " ";
    }
    cerr << endl;
}

template<typename T> void debug(map<T, T> &mp){
    for (auto itr = mp.begin(); itr != mp.end(); itr++){
        cerr << itr->first << " " << itr->second << endl;
    }
}

void debug_out(){
    cerr << endl;
}

template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T){
    cerr << H << " ";
    debug_out(T...);
}

ll my_pow(ll x, ll n, ll mod){
    //　繰り返し二乗法．x^nをmodで割った余り．
    ll ret;
    if (n == 0){
        ret = 1;
    }
    else if (n % 2 == 1){
        ret = (x * my_pow((x * x) % mod, n / 2, mod)) % mod;
    }
    else{
        ret = my_pow((x * x) % mod, n / 2, mod);
    }
    return ret;
}

ll inv(ll x, ll mod){
    return my_pow(x, mod - 2, mod);
}

int main(){
    ll N, Q;
    cin >> N >> Q;
    vl A(Q);
    vl B(Q);
    vl C(Q);
    for (ll i = 0; i < Q; i++){
        cin >> A[i] >> B[i] >> C[i];
        A[i]--;
        B[i]--;
    }
    vvpll graph(N, vpll(0));
    rep(i,Q){
        graph[A[i]].push_back(pll(B[i], C[i]));
        graph[B[i]].push_back(pll(A[i], C[i]));
    }
    dsu tree(N);
    for (ll i = 0; i < Q; i++){
        tree.merge(A[i], B[i]);
    }
    ll ans = 1;
    vl color(N, -1);
    queue<ll> que;
    // 連結成分ごとに二部グラフかの判定
    for (ll i = 0; i < N; i++){
        if (color[i] == -1){
            bool pos = true;
            color[i] = 0;
            que.push(i);
            while(que.size()){
                ll p = que.front();
                que.pop();
                for (pll px: graph[p]){
                    //debug_out(px.first, p, color[px.first], color[p], px.second);
                    if (color[px.first] != -1){
                        if (color[px.first] != color[p] ^ px.second){
                            pos = false;
                            break;
                        }
                        else continue;
                    }
                    else{
                        color[px.first] = color[p] ^ px.second;
                        que.push(px.first);
                    }
                }
            }
            //debug(pos);
            if (!pos){
                ans = (ans * 0LL);
            }
            else{
                ans = (ans * 2LL) % mod2;
            }
        }
    }
    //debug(color);
    cout << ans << endl;
}