#ifndef hari64
#include <bits/stdc++.h>
// #pragma GCC target("avx2")
// #pragma GCC optimize("O3")
// #pragma GCC optimize("unroll-loops")
#define debug(...)
#else
#include "util/viewer.hpp"
#define debug(...) viewer::_debug(__LINE__, #__VA_ARGS__, __VA_ARGS__)
#endif
using namespace std;
constexpr int INF = 1001001001;
constexpr long long INFll = 1001001001001001001;
template <class T>
bool chmax(T& a, const T& b) {
    return a < b ? a = b, 1 : 0;
}
template <class T>
bool chmin(T& a, const T& b) {
    return a > b ? a = b, 1 : 0;
}

// clang-format off
namespace internal{template<class T>using is_signed_int128=typename conditional<is_same<T,__int128_t>::value||is_same<T,__int128>::value,true_type,false_type>::type;template<class T>using is_unsigned_int128=typename conditional<is_same<T,__uint128_t>::value||is_same<T,unsigned __int128>::value,true_type,false_type>::type;template<class T>using is_integral=typename conditional<std::is_integral<T>::value||is_signed_int128<T>::value||is_unsigned_int128<T>::value,true_type,false_type>::type;
template<class T>using is_signed_int=typename conditional<(is_integral<T>::value&&is_signed<T>::value)||is_signed_int128<T>::value,true_type,false_type>::type;template<class T>using is_unsigned_int=typename conditional<(is_integral<T>::value&&is_unsigned<T>::value)||is_unsigned_int128<T>::value,true_type,false_type>::type;template<class T>using is_signed_int_t=enable_if_t<is_signed_int<T>::value>;template<class T>using is_unsigned_int_t=enable_if_t<is_unsigned_int<T>::value>;
constexpr long long safe_mod(long long x,long long m){x%=m;if(x<0)x+=m;return x;}struct barrett{unsigned int _m;unsigned long long im;explicit barrett(unsigned int m):_m(m),im((unsigned long long)(-1)/m+1){}unsigned int umod()const{return _m;}unsigned int mul(unsigned int a,unsigned int b)const{unsigned long long z=a;z*=b;unsigned long long x=(unsigned long long)(((unsigned __int128)(z)*im)>>64);unsigned int v=(unsigned int)(z-x*_m);if(_m<=v)v+=_m;return v;}};
constexpr long long pow_mod_constexpr(long long x,long long n,int m){if(m==1)return 0;unsigned int _m=(unsigned int)(m);unsigned long long r=1;unsigned long long y=safe_mod(x,m);while(n){if(n&1)r=(r*y)%_m;y=(y*y)%_m;n>>=1;}return r;}constexpr pair<long long,long long>inv_gcd(long long a,long long b){a=safe_mod(a,b);if(a==0)return{b,0};long long s=b,t=a;long long m0=0,m1=1;while(t){long long u=s/t;s-=t*u;m0-=m1*u;auto tmp=s;s=t;t=tmp;tmp=m0;m0=m1;m1=tmp;}if(m0<0)m0+=b/s;return{s,m0};}
constexpr bool is_prime_constexpr(int n){if(n<=1)return false;if(n==2||n==7||n==61)return true;if(n%2==0)return false;long long d=n-1;while(d%2==0)d/=2;constexpr long long bases[3]={2,7,61};for(long long a:bases){long long t=d;long long y=pow_mod_constexpr(a,t,n);while(t!=n-1&&y!=1&&y!=n-1){y=y*y%n;t<<=1;}if(y!=n-1&&t%2==0)return false;}return true;}template<int n>constexpr bool is_prime=is_prime_constexpr(n);} // namespace internal
template<int m>struct static_modint{using mint=static_modint;static constexpr int mod(){return m;}static mint raw(int v){mint x;x._v=v;return x;}static_modint():_v(0){}template<class T,internal::is_signed_int_t<T>* =nullptr>static_modint(T v){long long x=(long long)(v%(long long)(umod()));if(x<0)x+=umod();_v=(unsigned int)(x);}template<class T,internal::is_unsigned_int_t<T>* =nullptr>static_modint(T v){_v=(unsigned int)(v%umod());}unsigned int val()const{return _v;}
mint&operator++(){_v++;if(_v==umod())_v=0;return*this;}mint&operator--(){if(_v==0)_v=umod();_v--;return*this;}mint operator++(int){mint result=*this;++*this;return result;}mint operator--(int){mint result=*this;--*this;return result;}mint&operator+=(const mint&rhs){_v+=rhs._v;if(_v>=umod())_v-=umod();return*this;}mint&operator-=(const mint&rhs){_v-=rhs._v;if(_v>=umod())_v+=umod();return*this;}
mint&operator*=(const mint&rhs){unsigned long long z=_v;z*=rhs._v;_v=(unsigned int)(z%umod());return*this;}mint&operator/=(const mint&rhs){return*this=*this*rhs.inv();}mint operator+()const{return*this;}mint operator-()const{return mint()-*this;}mint pow(long long n)const{assert(0<=n);mint x=*this,r=1;while(n){if(n&1)r*=x;x*=x;n>>=1;}return r;}mint inv()const{if(prime){assert(_v);return pow(umod()-2);}else{auto eg=internal::inv_gcd(_v,m);assert(eg.first==1);return eg.second;}}
friend mint operator+(const mint&lhs,const mint&rhs){return mint(lhs)+=rhs;}friend mint operator-(const mint&lhs,const mint&rhs){return mint(lhs)-=rhs;}friend mint operator*(const mint&lhs,const mint&rhs){return mint(lhs)*=rhs;}friend mint operator/(const mint&lhs,const mint&rhs){return mint(lhs)/=rhs;}friend bool operator==(const mint&lhs,const mint&rhs){return lhs._v==rhs._v;}friend bool operator!=(const mint&lhs,const mint&rhs){return lhs._v!=rhs._v;}
friend ostream&operator<<(ostream&os,const mint&rhs){return os<<rhs._v;}friend istream&operator>>(istream&is,mint&rhs){long long v;is>>v;v%=(long long)(umod());if(v<0)v+=umod();;rhs._v=(unsigned int)v;return is;}static constexpr bool prime=internal::is_prime<m>;private:unsigned int _v;static constexpr unsigned int umod(){return m;}};
constexpr int MOD = 998244353;using mint=static_modint<MOD>;vector<mint>mint_factorial={mint(1)};/*n>1e8 ⇒ fast_modfact(deprecated)*/mint modfact(int n){assert(n<=100000000);if(int(mint_factorial.size())<=n){for(int i=mint_factorial.size();i<=n;i++){mint next=mint_factorial.back()*i;mint_factorial.push_back(next);}}return mint_factorial[n];}
/*x s.t. x^2 ≡ a (mod Prime) or -1*/mint modsqrt(mint a){long long p=mint::mod();if(a.val()==1)return a;if(a.pow((p-1)>>1).val()!=1)return -1;mint b=1,one=1;while(b.pow((p-1)>>1).val()==1)b+=one;long long m=p-1,e=0;while(m%2==0)m>>=1,e++;mint x=a.pow((m-1)>>1);mint y=a*x*x;x*=a;mint z=b.pow(m);while(y!=1){long long j=0;mint t=y;while(t!=one)j++,t*=t;z=z.pow(1ll<<(e-j-1));x*=z;z*=z;y*=z;e=j;}return x;}mint nCk(int n,int k){if(k<0||n<k)return mint(0);return modfact(n)*(modfact(k)).inv()*modfact(n-k).inv();}
/*min x s.t. a^x ≡ b (mod M) or -1*/int modlog(mint a,mint b){if(gcd(a.mod(),a.val())!=1){cout<<"\033[1;31mCAUTION: m must be coprime to a.\033[0m"<<endl;assert(false);}long long m=mint::mod();long long sq=round(sqrt(m))+1;unordered_map<long long,long long>ap;mint re=a;for(long long r=1;r<sq;r++){if(ap.find(re.val())==ap.end())ap[re.val()]=r;re*=a;}mint A=a.inv().pow(sq);re=b;for(mint q=0;q.val()<sq;q++){if(re==1&&q!=0)return(q*sq).val();if(ap.find(re.val())!=ap.end())return(q*sq+ap[re.val()]).val();re*=A;}return-1;};
// clang-format on

// clang-format off
// Implement (union by size) + (path compression)
// Reference: Zvi Galil and Giuseppe F. Italiano,
struct UnionFind {
    explicit UnionFind(int n):_n(n),group_cnt(n),par_or_sz(n,-1),edge(n,0){}
    // the leader of the connected component
    virtual int merge(int a,int b){assert(0<=a&&a<_n&&0<=b&&b<_n);int x=find(a),y=find(b);if(x==y){edge[x]++;return x;};group_cnt--;if(-par_or_sz[x]<-par_or_sz[y])swap(x,y);edge[x]+=edge[y]+1;par_or_sz[x]+=par_or_sz[y];return par_or_sz[y]=x;}
    // the size of the connected component that contains the vertex a
    virtual int find(int a){assert(0<=a&&a<_n);return par_or_sz[a]<0?a:par_or_sz[a]=find(par_or_sz[a]);}
    // is same
    bool same(int a,int b){assert(0<=a&&a<_n&&0<=b&&b<_n);return find(a)==find(b);}
    // the size of the connected component that contains the vertex a
    int size(int a){assert(0<=a&&a<_n);return -par_or_sz[find(a)];}
    // cycle ⇒ -sz[a] <= -sz[a] - 1 = edge[a] (O(1)) / if a==-1 then check all vertexes (O(N))
    bool has_cycle(int a=-1){assert(-1<=a&&a<_n);if(0<=a){a=find(a);return -par_or_sz[a]<=edge[a];}else{for(int b=0;b<_n;b++)if(par_or_sz[b]<0&&-par_or_sz[b]<=edge[b])return true;}return false;}
    // tree ⇒ -sz[a] > -sz[a] - 1 = edge[a] O(N)
    int num_of_tree(){int num_of_tree=0;for(int a=0;a<_n;a++)if(par_or_sz[a]<0&&-par_or_sz[a]>edge[a])num_of_tree++;return num_of_tree;}
    // the list of the "list of the vertices in a connected component" O(N)
    vector<vector<int>>groups(bool index1=false){vector<vector<int>>ret(_n);for(int i=0;i<_n;i++)ret[find(i)].push_back(i+int(index1));ret.erase(remove_if(ret.begin(),ret.end(),[&](const vector<int>&v){return v.empty();}),ret.end());return ret;}
    // UnionFind::groups().size() O(1)
    int group_count(){return group_cnt;}
   protected:
    int _n;int group_cnt;/* root node: -1 * component size , otherwise: parent */vector<int>par_or_sz;vector<int>edge;
};

/// @ref https://qiita.com/drken/items/cce6fc5c579051e64fab
/// @brief merge(a,b,w): A[a] - A[b] == z
///        diff(a,b):  A[b]-A[a] (REQUIRE:same(a,b))
template <class Abel> struct weighted_dsu : UnionFind {
    explicit weighted_dsu(int n,Abel SUM_UNITY=0):diff_weight(n,SUM_UNITY){_n=n;group_cnt=0;par_or_sz.resize(n,-1);}
    int find(int a)override{assert(0<=a&&a<_n);if(par_or_sz[a]<0)return a;int r=find(par_or_sz[a]);diff_weight[a]+=diff_weight[par_or_sz[a]];return par_or_sz[a]=r;}
    int merge(int a,int b,Abel w){assert(0<=a&&a<_n&&0<=b&&b<_n);w+=weight(a)-weight(b);int x=find(a),y=find(b);if(x==y)return x;group_cnt--;if(-par_or_sz[x]<-par_or_sz[y])swap(x,y),w=-w;par_or_sz[x]+=par_or_sz[y];diff_weight[y]=w;return par_or_sz[y]=x;}
    Abel weight(int a){find(a);return diff_weight[a];}
    Abel diff(int a, int b){assert(same(a,b));return weight(b)-weight(a);}
    private:vector<Abel> diff_weight;};

/// @ref https://misteer.hatenablog.com/entry/persistentUF
/// @ref https://ei1333.github.io/library/structure/union-find/partially-persistent-union-find.cpp
/// @brief UnionFind which can reference all previous versions and update the current (not previous) version.
/// @note t = -1 is the initial time.(each node's parent is itself)
struct partially_persistent_dsu {
    partially_persistent_dsu(int n):_n(n),par_or_sz(n,-1),last(n,INF),add(n,{{-1,-1}}){}
    int merge(int a,int b,int t){assert(0<=a&&a<_n&&0<=b&&b<_n);int x=find(a,t),y=find(b,t);if(x==y)return x;if(-par_or_sz[x]<-par_or_sz[y])swap(x,y);last[y]=t;par_or_sz[x]+=par_or_sz[y];add[x].emplace_back(t,par_or_sz[x]);return par_or_sz[y]=x;}
    int find(int a,int t){assert(0<=a&&a<_n);if(t<last[a])return a;return find(par_or_sz[a],t);}
    bool same(int a,int b,int t){assert(0<=a&&a<_n&&0<=b&&b<_n);return find(a,t)==find(b,t);}
    int size(int a,int t){assert(0<=a&&a<_n);int x=find(a,t);return -prev(lower_bound(add[x].begin(),add[x].end(),make_pair(t,0)))->second;}
    private:int _n;vector<int>par_or_sz;vector<int>last;vector<vector<pair<int,int>>>add;};
// clang-format on

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int N;
    cin >> N;
    int Q;
    cin >> Q;
    UnionFind uf(2 * N);
    for (int i = 0; i < Q; i++) {
        int A, B, C;
        cin >> A >> B >> C;
        A--;
        B--;

        if (C == 0) {
            uf.merge(A, B);
            uf.merge(A + N, B + N);
        } else {
            uf.merge(A, B + N);
            uf.merge(A + N, B);
        }
    }

    for (int i = 0; i < N; i++) {
        if (uf.same(i, N + i)) {
            cout << 0 << endl;
            return 0;
        }
    }

    cout << mint(2).pow(uf.group_count() / 2) << endl;

    return 0;
}