#include <iostream>
#include <algorithm>
#include <iomanip>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <tuple>
#include <cmath>
#include <numeric>
#include <functional>
#include <cassert>
#include <atcoder/modint>

#define debug_value(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << #x << "=" << x << endl;
#define debug(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << x << endl;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

using namespace std;
typedef long long ll;

template<typename T>
vector<vector<T>> vec2d(int n, int m, T v){
    return vector<vector<T>>(n, vector<T>(m, v));
}

template<typename T>
vector<vector<vector<T>>> vec3d(int n, int m, int k, T v){
    return vector<vector<vector<T>>>(n, vector<vector<T>>(m, vector<T>(k, v)));
}

template<typename T>
void print_vector(vector<T> v, char delimiter=' '){
    if(v.empty()) {
        cout << endl;
        return;
    }
    for(int i = 0; i+1 < v.size(); i++) cout << v[i] << delimiter;
    cout << v.back() << endl;
}

using mint = atcoder::modint998244353;

ostream& operator<<(ostream& os, const mint& m){
    os << m.val();
    return os;
}

struct edge{
    int to, c;
    edge(int to, int c): to(to), c(c) {}
};

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << setprecision(10) << fixed;
    int n, q; cin >> n >> q;
    vector<vector<edge>> g(n);
    while(q--){
        int a, b, c; cin >> a >> b >> c; a--; b--;
        g[a].push_back(edge(b, c));
        g[b].push_back(edge(a, c));
    }

    vector<int> col(n, -1);
    function<bool(int, int)> dfs = [&](int v, int c){
        col[v] = c;
        for(edge e: g[v]){
            if(col[e.to] != -1){
                if(col[e.to] != c^e.c) return false;
            }else{
                if(!dfs(e.to, c^e.c)) return false;
            }
        }
        return true;
    };
    mint ans = 1;
    for(int i = 0; i < n; i++){
        if(col[i] == -1){
            if(!dfs(i, 0)){
                cout << 0 << endl;
                return 0;
            }
            ans *= 2;
        }
    }
    cout << ans << endl;
}