// library begin: "lib/template.hpp"
#ifdef TEMPLATE
#else
#define TEMPLATE
//see https://github.com/ryoku1020/lib
# pragma GCC optimize("O3")
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <string>
#include <cstring>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <deque>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <algorithm>
#include <numeric>
#include <cmath>
#include <climits>
#include <cassert>
#include <functional>
#include <iterator>
#include <utility>
#include <complex>
#include <bitset>
#include <chrono>
#include <random>
#include <limits>
#include <optional>
#include <variant>
#include <any>

#include <array>
#include <bit>
#include <compare>
#include <concepts>
#include <numbers>
#include <ranges>
#include <span>
#include <string_view>
#include <tuple>
#include <type_traits>
#include <version>
using namespace std;
namespace ryoku{}
using uint=unsigned;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
using pii=pair<int,int>;
using pll=pair<ll,ll>;
using i128=__int128;
using u128=unsigned __int128;
template<class T>using vc=vector<T>;
template<class T>using vvc=vc<vc<T>>;
template<class T>using vvvc=vvc<vc<T>>;
template<class T>using smpq=priority_queue<T,vector<T>,greater<T>>;
template<class T>using bipq=priority_queue<T>;
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
#define REP(i,j,n) for(ll i=(j);i<(ll)(n);i++)
#define DREP(i,n,m) for(ll i=(n);i>=(m);i--)
#define drep(i,n) for(ll i=((n)-1);i>=0;i--)
#define rall(x) x.rbegin(),x.rend()
#define mp(...) make_pair(__VA_ARGS__)
#define pb push_back
#define fi first
#define se second
#define is insert
#define bg begin()
#define ed end()
#define all(x) x.begin(),x.end()
void scan(int&a) { cin >> a; }
void scan(ll&a) { cin >> a; }
void scan(string&a) { cin >> a; }
void scan(char&a) { cin >> a; }
void scan(uint&a) { cin >> a; }
void scan(ull&a) { cin >> a; }
void scan(bool&a) { cin >> a; }
void scan(ld&a){ cin>> a;}
template<class T> void scan(vector<T>&a) { for(auto&x:a) scan(x); }
void read() {}
template<class Head, class... Tail> void read(Head&head, Tail&... tail) { scan(head); read(tail...); }
#define INT(...) int __VA_ARGS__; read(__VA_ARGS__);
#define LL(...) ll __VA_ARGS__; read(__VA_ARGS__);
#define ULL(...) ull __VA_ARGS__; read(__VA_ARGS__);
#define STR(...) string __VA_ARGS__; read(__VA_ARGS__);
#define VC(type, name, ...) vector<type> name(__VA_ARGS__); read(name);
#define VVC(type, name, size, ...) vector<vector<type>> name(size, vector<type>(__VA_ARGS__)); read(name);
template<class T>void print(T a) { cout << a; }
template<class T> void print(vector<T>a) { for(int i=0;i<(int)a.size();i++){if(i)cout<<" ";print(a[i]);}}
void PRT() { cout <<endl; return ; }
template<class T> void PRT(T a) { print(a); cout <<endl; return; }
template<class Head, class... Tail> void PRT(Head head, Tail ... tail) { print(head); cout << " "; PRT(tail...); return; }
template<class T,class F>
bool chmin(T &x, F y){
    if(x>y){
        x=y;
        return true;
    }
    return false;
}
template<class T, class F>
bool chmax(T &x, F y){
    if(x<y){
        x=y;
        return true;
    }
    return false;
}
template<typename T>
T floor(T a,T b){
    return a/b-(a%b&&((a<0)!=(b<0)));
}
template<typename T>
T ceil(T a,T b){
    return a/b+(a%b&&((a<0)==(b<0)));
}
template<typename T>
T bmod(T x,T y){
    return x-y*floor(x,y);
}
template<typename T>
pair<T,T>divmod(T x,T y){
    T q=floor(x,y);
    return{q,x-q*y};
}
void YesNo(bool b){
    cout<<(b?"Yes":"No")<<endl;
}
void YESNO(bool b){
    cout<<(b?"YES":"NO")<<endl;
}
void AliceBob(bool b){
    cout<<(b?"Alice":"Bob")<<endl;
}
void TakahashiAoki(bool b){
    cout<<(b?"Takahashi":"Aoki")<<endl;
}
void Yes(){
    cout<<"Yes"<<endl;
}
void No(){
    cout<<"No"<<endl;
}
vc<int>stovi(const string&s,const string&S){
    vc<int>v(s.size());
    rep(i,s.size()){
        auto t=S.find(s[i]);
        assert(t!=string::npos);
        v[i]=t;
    }
    return v;
}
template<class T=ll>
T isqrt(T x){
    T F=sqrtl(x);
    while((F+1)*(F+1)<=x)F++;
    while(F*F>x)F--;
    return F;
}
template<class T>
T tri(T x){return x*(x-1)/2;}

//[l,r)
template<class T>T tri(T l,T r){return (r-l)*(l+r-1)/2;}
//n を先頭に持ってくる
template<class T>
vc<T>rot(vc<T>v,int n){
    rotate(v.begin(),v.begin()+n,v.end());
    return v;
}
template<class Container>
auto rle(const Container&cv){
    using T=typename Container::value_type;
    vc<pair<T,int>>res;
    for(const auto&x:cv){
        if(res.empty()||res.back().fi!=x)res.pb({x,1});
        else res.back().se++;
    }
    return res;
}
template<class T>
vc<T>iota(int n){
    vc<T>v(n);rep(i,n)v[i]=i;
    return v;
}
template<class T,int minfirst>
vc<int>argsort(const vc<T>&a){
    auto idx=iota<int>(a.size());
    sort(all(idx),[&](int i,int j){
        return (minfirst?make_pair(a[i],i)<make_pair(a[j],j):make_pair(a[i],i)>make_pair(a[j],j));
    });
    return idx;
}
template<class T>
vvc<T>trans(const vvc<T>&a){
    assert(a.size()&&a[0].size());
    rep(i,a.size())assert(a[i].size()==a[0].size());
    vvc<T>b(a[0].size(),vc<T>(a.size()));
    rep(i,a.size())rep(j,a[0].size())b[j][i]=a[i][j];
    return b;
}
vc<string>trans(const vc<string>&a){
    assert(a.size()&&a[0].size());
    rep(i,a.size())assert(a[i].size()==a[0].size());
    vc<string>b(a[0].size(),string(a.size(),0));
    rep(i,a.size())rep(j,a[0].size())b[j][i]=a[i][j];
    return b;
}
template<class T>
int popcount(T n){
    return __builtin_popcountll(n);
}
template<class T,class L=ll>
L sum(const vc<T>&a){
    return accumulate(all(a),L(0));
}
template<class T>
struct subset_view{
    T s;
    struct iterator{
        T s,x;
        bool done;
        T operator*()const{return x;}
        iterator&operator++(){
            if(x==0)done=true;
            else x=(x-1)&s;
            return*this;
        }
        bool operator!=(const iterator&r)const{return done!=r.done;}
    };
    iterator begin()const{return{s,s,false};}
    iterator end()const{return{s,0,true};}
};
template<class T>
subset_view<T>subset(T s){
    return{s};
}
template<class T>
T max(vc<T>&a){
    return *max_element(all(a));
}
template<class T>
T min(vc<T>&a){
    return *min_element(all(a));
}
template<class T,class L=ll>
vc<L> presum(vc<T> &a){
    vc<L> ret(a.size()+1);
    rep(i,a.size())ret[i+1]=ret[i]+a[i];
    return ret;
}
template<class T, class F>
vc<T> &operator+=(vc<T> &a,F b){
    for (auto&v:a)v += b;
    return a;
}
template<class T, class F>
vc<T> &operator-=(vc<T>&a,F b){
    for (auto&v:a)v-=b;
    return a;
}
template<class T, class F>
vc<T> &operator*=(vc<T>&a,F b){
    for (auto&v:a)v*=b;
    return a;
}
template<class T=ll>
constexpr T pow(T a,T b){
    T res=1;
    while(b){
        if(b&1)res*=a;
        a*=a;
        b/=2;
    }
    return res;
}
constexpr ll ten(ll a){
    return pow<ll>(10,a);
}
template<typename T>constexpr T inf=numeric_limits<T>::max()/2-1;
template<>
constexpr pll inf<pll> ={inf<ll>,inf<ll>};
template<class T>
constexpr T neg_inf=-inf<T>;
template<>
constexpr pll neg_inf<pll> ={-inf<ll>,-inf<ll>};
template<class T>
int tbit(T x){
    using U=make_unsigned_t<T>;
    U y=(U)x;
    return y?(int)bit_width(y)-1:-1;
}
template<class T>
int lbit(T x){
    using U=make_unsigned_t<T>;
    U y=(U)x;
    return y?(int)countr_zero(y):-1;
}
template<class T>
int tbit(T x,int p){
    using U=make_unsigned_t<T>;
    constexpr int W=numeric_limits<U>::digits;
    U y=(U)x;
    if(p<0)return -1;
    if(p>=W-1)return tbit(y);
    return tbit(y&((U(1)<<(p+1))-1));
}
template<class T>
int lbit(T x,int p){
    using U=make_unsigned_t<T>;
    constexpr int W=numeric_limits<U>::digits;
    U y=(U)x;
    if(p<0)return lbit(y);
    if(p>=W)return -1;
    return lbit(y&(~U(0)<<p));
}
istream& operator>>(istream&is,i128&x){
    string s;is>>s;
    x=0;
    int i=0,neg=0;
    if(s[0]=='-')neg=1,i=1;
    for(;i<(int)s.size();i++)x=x*10+s[i]-'0';
    if(neg)x=-x;
    return is;
}
ostream& operator<<(ostream&os,i128 x){
    if(x==0)return os<<0;
    if(x<0)os<<"-";
    u128 y=x<0?-(u128)x:(u128)x;
    string s;
    while(y)s.pb('0'+y%10),y/=10;
    reverse(all(s));
    return os<<s;
}
#ifdef LOCAL
#include"lib/debug/local.hpp"
inline int dbging=1;
#else
#define dbg(...) ((void)0)
#endif

struct template_setup{
    template_setup(){
        #if defined(LOCAL)&&!defined(INTERACTIVE)
        freopen("input.txt","r",stdin);
        freopen("output.txt","w",stdout);
        
        #endif
        cin.tie(0)->sync_with_stdio(0);
        #ifdef LOCAL
        cout<<fixed<<setprecision(6);
        #else
        cout<<fixed<<setprecision(20);
        #endif
    }
};
inline template_setup template_setup;


#endif
// library end: "lib/template.hpp"
// library begin: "lib/math/modular/binom.hpp"
// library include: "lib/template.hpp"
namespace ryoku{
template<class,class=void>
struct binom_has_get_mod:false_type{};
template<class mint>
struct binom_has_get_mod<mint,void_t<decltype(mint::get_mod())>>:true_type{};
template<class mint>
struct binom{
private:
    static vector<mint>&fact_table(){static vector<mint>v={1};return v;}
    static vector<mint>&invfact_table(){static vector<mint>v={1};return v;}
    static vector<mint>&invs_table(){static vector<mint>v={0};return v;}
    static int&built_mod(){static int mod=-1;return mod;}
public:
    static void build(int n){
        auto&_fact=fact_table();
        auto&_invfact=invfact_table();
        auto&_invs=invs_table();
        if constexpr(binom_has_get_mod<mint>::value){
            auto mod=mint::get_mod();
            if(built_mod()!=mod){
                _fact={1};
                _invfact={1};
                _invs={0};
                built_mod()=mod;
            }
        }
        if(n<(int)_fact.size())return;
        int old=_fact.size();
        _fact.resize(n+1);
        _invfact.resize(n+1);
        _invs.resize(n+1);
        if constexpr(binom_has_get_mod<mint>::value){
            auto mod=mint::get_mod();
            for(int i=old;i<=n;i++){
                _fact[i]=_fact[i-1]*i;
                if(i==1)_invs[i]=1;
                else _invs[i]=-_invs[mod%i]*(mod/i);
                _invfact[i]=_invfact[i-1]*_invs[i];
            }
        }else{
            for(int i=old;i<=n;i++){
                _fact[i]=_fact[i-1]*i;
                _invs[i]=mint(1)/i;
                _invfact[i]=_invfact[i-1]*_invs[i];
            }
        }
    }
    static mint fact(int i){
        assert(i>=0);
        build(i);
        return fact_table()[i];
    }
    static mint invfact(int i){
        assert(i>=0);
        build(i);
        return invfact_table()[i];
    }
    static mint inv(int i){
        assert(i>0);
        build(i);
        return invs_table()[i];
    }
    static mint C(int a,int b){//aCb
        if(b==0)return 1;
        if(a<0||b<0||a-b<0)return mint(0);
        build(a);
        auto&_fact=fact_table();
        auto&_invfact=invfact_table();
        return _fact[a]*_invfact[b]*_invfact[a-b];
    }
    static mint iC(int a,int b){//1/aCb
        if(b==0)return 1;
        if(a<0||b<0||a-b<0)return mint(0);
        build(a);
        auto&_fact=fact_table();
        auto&_invfact=invfact_table();
        return _fact[b]*_fact[a-b]*_invfact[a];
    }
    static mint P(int a,int b){
        if(a<b||b<0)return 0;
        build(a);
        auto&_fact=fact_table();
        auto&_invfact=invfact_table();
        return _fact[a]*_invfact[a-b];
    }
    static mint H(int a,int b){
        return C(a+b-1,b);
    }

};
}
// library end: "lib/math/modular/binom.hpp"
// library begin: "lib/graph/base.hpp"
// library include: "lib/template.hpp"
namespace ryoku{
struct unweighted{
    unweighted()=default;
    unweighted(int){}
    operator int()const{return 1;}
};
template<class T=unweighted>
struct edge{
    int from,to,id;
    [[no_unique_address]]T cost;
#ifdef LOCAL
    friend ostream&operator<<(ostream&os,const edge&e){
        return os<<"{from:"<<e.from<<",to:"<<e.to<<",id:"<<e.id<<",cost:"<<e.cost<<"}";
    }
#endif
};
template<bool is_directed,class T=unweighted>
struct static_graph{
    constexpr static bool directed(){return is_directed;}
    using edge=::ryoku::edge<T>;
    using cost_t=T;
private:
    int n;
    mutable bool built=false,inv_built=false;
    vc<edge>edges;
    mutable vc<int>start,inv_start;
    mutable vc<edge>csr,inv_csr;
public:
    static_graph(int n):n(n),start(n+1),inv_start(n+1){assert(n>=0);}
    static_graph(int n,int m):static_graph(n){assert(m>=0);edges.reserve(m);}
    void resize(int size){
        assert(n<=size&&!built);
        assert(!inv_built);
        n=size;
        start.resize(n+1);
        inv_start.resize(n+1);
    }
    void add_edge(const edge&e){
        assert(!built&&!inv_built);
        assert(0<=e.from&&e.from<n&&0<=e.to&&e.to<n);
        edges.pb(e);
    }
    void add_edge(int a,int b,cost_t cost=1,int id=-1){
        assert(!built&&!inv_built);
        assert(0<=a&&a<n&&0<=b&&b<n);
        if(id==-1)id=edges.size();
        edges.pb({a,b,id,cost});
    }
    template<int substract=0>
    void input(int m){
        assert(m>=0);
        rep(i,m){
            INT(a,b);
            a-=substract;b-=substract;
            add_edge(a,b);
        }
        build();
    }
    void build()const{
        if(built)return;
        built=true;
        start.assign(n+1,0);
        for(auto&e:edges){
            ++start[e.from];
            if constexpr(!is_directed)++start[e.to];
        }
        rep(i,n)start[i+1]+=start[i];
        csr.resize(start[n]);
        for(auto it=edges.rbegin();it!=edges.rend();++it){
            auto&e=*it;
            csr[--start[e.from]]=e;
            if constexpr(!is_directed)csr[--start[e.to]]={e.to,e.from,e.id,e.cost};
        }
    }
    void buildinv()const{
        if(inv_built)return;
        inv_start.assign(n+1,0);
        for(auto&e:edges){
            ++inv_start[e.to];
            if constexpr(!is_directed)++inv_start[e.from];
        }
        rep(i,n)inv_start[i+1]+=inv_start[i];
        inv_csr.resize(inv_start[n]);
        for(auto it=edges.rbegin();it!=edges.rend();++it){
            auto&e=*it;
            inv_csr[--inv_start[e.to]]={e.to,e.from,e.id,e.cost};
            if constexpr(!is_directed)inv_csr[--inv_start[e.from]]={e.from,e.to,e.id,e.cost};
        }
        inv_built=true;
    }
    auto operator[](int u){
        build();
        assert(0<=u&&u<n);
        return span<edge>(csr.data()+start[u],start[u+1]-start[u]);
    }

    auto operator[](int u)const{
        build();
        assert(0<=u&&u<n);
        return span<const edge>(csr.data()+start[u],start[u+1]-start[u]);
    }

    auto inv(int u){
        buildinv();
        assert(0<=u&&u<n);
        return span<edge>(inv_csr.data()+inv_start[u],inv_start[u+1]-inv_start[u]);
    }

    auto inv(int u)const{
        buildinv();
        assert(0<=u&&u<n);
        return span<const edge>(inv_csr.data()+inv_start[u],inv_start[u+1]-inv_start[u]);
    }

    const vc<edge>&all_edges()const{return edges;}
    int edge_size()const{return edges.size();}

    edge get_edge(int id)const{
        assert(0<=id&&id<edge_size());
        return edges[id];
    }
    int out_deg(int u)const{
        build();
        assert(0<=u&&u<n);
        return start[u+1]-start[u];
    }
    int in_deg(int u)const{
        buildinv();
        assert(0<=u&&u<n);
        return inv_start[u+1]-inv_start[u];
    }
    int deg(int u)const{return out_deg(u);}
    int size()const{return n;}
    template<class F>
    vvc<F>adj()const{
        vvc<F>res(n,vc<F>(n));
        for(auto&e:edges){
            res[e.from][e.to]=e.cost;
            if constexpr(!is_directed)res[e.to][e.from]=e.cost;
        }
        return res;
    }
    void clear(){
        built=false;
        inv_built=false;
        edges.clear();
        csr.clear();
        inv_csr.clear();
        start.assign(n+1,0);
        inv_start.assign(n+1,0);
    }
    template<class F>
    void sort(int i,F f){
        build();
        assert(0<=i&&i<n);
        std::sort(csr.begin()+start[i],csr.begin()+start[i+1],f);
    }
};

}

#ifdef LOCAL
#include"lib/debug/formatters/graph--base.hpp"
#endif
// library end: "lib/graph/base.hpp"
// library begin: "lib/math/modular/static-mod-int.hpp"
// library include: "lib/template.hpp"
namespace ryoku{
template<uint32_t mod>
struct static_modint{
    static_assert(0<mod&&mod<=(1u<<31)-1);
    using u32=uint32_t;
    using u64=uint64_t;
    u32 val;
    static_modint():val(0){}
    static_modint(ll x){
        ll v=x%mod;
        if(v<0)v+=mod;
        val=v;
    }
    constexpr static uint32_t get_mod(){
        return mod;
    }
    static static_modint raw(int v){
        assert(v>=0);
        static_modint mi;
        mi.val=v;
        return mi;
    }
    static_modint &operator+=(const static_modint&m){
        u32 x=val+m.val-mod;
        val=x+(mod&-(x>>31));
        return *this;
    }
    static_modint &operator-=(const static_modint&m){
        u32 x=val-m.val;
        val=x+(mod&-(x>>31));
        return *this;
    }
    static_modint &operator*=(const static_modint&m){
        val=u64(val)*m.val%mod;
        return *this;
    }
    static_modint &operator/=(const static_modint&m){
        val=u64(val)*m.inv().val%mod;
        return *this;
    }
    static_modint operator-() const{
        return static_modint(mod-val);
    }
    static_modint operator+() const {
        return *this;
    }
    friend static_modint operator+(static_modint lhs, const static_modint& rhs){
        return lhs+=rhs;
    }
    friend static_modint operator-(static_modint lhs, const static_modint& rhs){
        return lhs-=rhs;
    }
    friend static_modint operator*(static_modint lhs, const static_modint& rhs){
        return lhs*=rhs;
    }
    friend static_modint operator/(static_modint lhs,const static_modint&rhs){
        return lhs/=rhs;
    }
    bool operator==(const static_modint&p) const{
        return p.val==val;
    }
    bool operator!=(const static_modint&p) const{
        return p.val!=val;
    }
    static_modint pow(int64_t n) const{
        static_modint res(1),mul(val);
        while(n){
            if(n%2)res*=mul;
            mul*=mul;
            n/=2;
        }
        return res;
    }

    friend ostream&operator<<(ostream&os,const static_modint&p){
        os<<p.val;
        return os;
    }
    friend istream&operator>>(istream&is,static_modint&p){
        int64_t x;
        is>>x;
        p=static_modint(x);
        return is;
    }
    static_modint inv()const{
        int64_t a=val,b=mod,u=1,v=0,t;
        #ifdef LOCAL
        assert(gcd(a,b)==1);
        #endif
        while(b>0){
            t=a/b;
            swap(a-=t*b,b);
            swap(u-=t*v,v);
        }
        return static_modint(u);
    }
};

}
// library end: "lib/math/modular/static-mod-int.hpp"
using namespace ryoku;
// library include: "lib/math/modular/static-mod-int.hpp"
using mint=static_modint<998244353>;
using B=binom<mint>;
void solve(){
    INT(n,q);
    static_graph<0,int>g(n);
    rep(i,q){
        INT(a,b,c);
        --a,--b;g.add_edge(a,b,c);
    }
    mint ans=1;
    vc<int>col(n,-1);
    rep(i,n){
        if(col[i]!=-1)continue;
        ans*=2;
        col[i]=0;
        queue<int>que;que.push(i);
        while(que.size()){
            auto p=que.front();que.pop();
            for(auto&e:g[p]){
                if(col[e.to]!=-1){
                    if(col[e.to]!=(col[p]^e.cost))ans=0;
                }else{
                    col[e.to]=col[p]^e.cost;que.push(e.to);
                }
            }
        }
    }
    PRT(ans);
}
signed main(){
    int t=1;
    // cin >> t;
    while(t--)solve();
}