#include <bits/stdc++.h>

namespace solution
{
    // clang-format off
    typedef bool bol;typedef char chr;typedef double dbi;typedef long long i64;typedef __int128 i128;constexpr dbi EPS=1e-8;constexpr int MOD=998244353;template<typename T>T qpow(T a,i64 b=MOD-2,i64 c=MOD){T res=1;while(b){if(b&1){res*=a,res%=c;}a*=a,a%=c,b>>=1;}return res;}template<typename T>T&cmax(T&x,const T y){return x>=y?x:x=y;}template<typename T>T&cmin(T&x,const T y){return x<=y?x:x=y;}template<typename T>T abs(T x){return x>=0?x:-x;}i64 floor(dbi x){return x+EPS;}i64 ceil(dbi x){return x-EPS+1;}template<typename T1,typename T2>struct pair{T1 fi;T2 se;bol operator==(const pair&a)const{return fi==a.fi&&se==a.se;}bol operator!=(const pair&a)const{return fi!=a.fi||se!=a.se;}bol operator<(const pair&a)const{return fi!=a.fi?fi<a.fi:se<a.se;}bol operator<=(const pair&a)const{return fi!=a.fi?fi<=a.fi:se<=a.se;}bol operator>(const pair&a)const{return fi!=a.fi?fi>a.fi:se>a.se;}bol operator>=(const pair&a)const{return fi!=a.fi?fi>=a.fi:se>=a.se;}};typedef pair<int,int>pii;template<i64 MOD=MOD>class ModInt{public:i64 val;ModInt<MOD>(i64 x=0):val(x>=0?(x<MOD?x:x%MOD):(x%MOD+MOD)){}ModInt operator+(const ModInt a)const{return ModInt(val+a.val>=MOD?val+a.val-MOD:val+a.val);}ModInt operator-(const ModInt a)const{return ModInt(val-a.val>=0?val-a.val:val-a.val+MOD);}ModInt operator*(const ModInt a)const{return ModInt(val*a.val%MOD);}ModInt operator/(const ModInt a)const{return ModInt(val*qpow(a,MOD-2).val%MOD);}ModInt operator&(const ModInt a)const{return ModInt(val&a.val);}ModInt operator|(const ModInt a)const{return ModInt((val|a.val)%MOD);}ModInt operator^(const ModInt a)const{return ModInt((val^a.val)%MOD);}ModInt operator<<(const ModInt a)const{return ModInt((val<<a.val)%MOD);}ModInt operator>>(const ModInt a)const{return ModInt(val>>a.val);}ModInt&operator++(){return val=val+1>=MOD?val+1-MOD:val+1,*this;}ModInt&operator+=(const ModInt a){return val=val+a.val>=MOD?val+a.val-MOD:val+a.val,*this;}ModInt&operator--(){return val=val-1>=0?val-1:val-1+MOD,*this;}ModInt&operator-=(const ModInt a){return val=val-a.val>=0?val-a.val:val-a.val+MOD,*this;}ModInt&operator*=(const ModInt a){return val=val*a.val%MOD,*this;}ModInt&operator/=(const ModInt a){return val=val*qpow(a,MOD-2).val%MOD,*this;}ModInt&operator&=(const ModInt a){return val=val&a.val,*this;}ModInt&operator|=(const ModInt a){return val=(val|a.val)%MOD,*this;}ModInt&operator^=(const ModInt a){return val=(val^a.val)%MOD,*this;}ModInt&operator<<=(const ModInt a){return val=(val<<a.val)%MOD,*this;}ModInt&operator>>=(const ModInt a){return val=val>>a.val,*this;}bol operator==(const ModInt&a)const{return val==a.val;}bol operator!=(const ModInt&a)const{return val!=a.val;}bol operator<(const ModInt&a)const{return val<a.val;}bol operator<=(const ModInt&a)const{return val<=a.val;}bol operator>(const ModInt&a)const{return val>a.val;}bol operator>=(const ModInt&a)const{return val>=a.val;}};template<i64 MOD=MOD>ModInt<MOD>qpow(ModInt<MOD>a,i64 b=MOD-2,i64 c=MOD){assert(c==MOD);ModInt<MOD>res=1;while(b){if(b&1){res*=a;}a*=a,b>>=1;}return res;}typedef ModInt<MOD>moi;class IO{public:i64 readi(){chr ch;i64 res=0,f=1;while(std::isdigit(ch=std::getchar())==false){f=(ch!='-');}do{res=res*10+(ch-'0');}while(std::isdigit(ch=std::getchar())==true);return res*(f?1:-1);}i128 readi128(){chr ch;i128 res=0,f=1;while(std::isdigit(ch=std::getchar())==false){f=(ch!='-');}do{res=res*10+(ch-'0');}while(std::isdigit(ch=std::getchar())==true);return res*(f?1:-1);}chr readc(){chr res=std::getchar();while(res==' '||res=='\n'){res=std::getchar();}return res;}std::string reads(){std::string res;std::cin>>res;return res;}template<typename T>T&read(T&x){return std::cin>>x,x;}int&read(int&x){return x=readi();}i64&read(i64&x){return x=readi();}i128&read(i128&x){return x=readi128();}template<i64 MOD=MOD>ModInt<MOD>&read(ModInt<MOD>&x){return x=readi();}chr&read(chr&x){return x=readc();}dbi&read(dbi&x){return scanf("%lf",&x),x;}template<typename T1,typename T2>pair<T1,T2>&read(pair<T1,T2>&x){return read(x.fi),read(x.se),x;}template<typename First,typename...Rest>void read(First&first,Rest&...rest){read(first);read(rest...);}template<typename T>void reada(T begin,T end){for(T iter=begin;iter!=end;iter++){read(*iter);}}void writei(i64 x){if(x<0){std::putchar('-'),writei(-x);return;}if(x>=10){writei(x/10);}std::putchar(x%10+'0');}void writei128(i128 x){if(x<0){std::putchar('-'),writei128(-x);return;}if(x>=10){writei128(x/10);}std::putchar(x%10+'0');}void writec(char x){std::putchar(x);}void writed(dbi x){printf("%lf",x);}template<typename T>void write(T x){std::cout<<x;}void write(int x){writei(x);}void write(i64 x){writei(x);}void write(i128 x){writei128(x);}template<i64 MOD=MOD>void write(ModInt<MOD>x){writei(x.val);}void write(char x){writec(x);}void write(dbi x){writed(x);}template<typename T1,typename T2>void write(pair<T1,T2>x){write(x.fi),std::putchar(' '),write(x.se);}template<typename First,typename...Rest>void write(First first,Rest...rest){write(first),std::putchar(' ');write(rest...);}template<typename First,typename...Rest>void writeln(First first,Rest...rest){write(first,rest...),std::putchar('\n');}template<typename T>void writea(T begin,T end){for(T iter=begin;iter!=end;iter++){write(*iter),std::putchar(' ');}}template<typename T>void writealn(T begin,T end){writea(begin,end),std::putchar('\n');}}io;
    // clang-format on

    constexpr int MAXN = 2e5 + 5;

    int n, m;

    int a[MAXN], b[MAXN], c[MAXN];

    int deg[2][MAXN];

    std::vector<int> e[2][MAXN];

    std::set<std::basic_string<int>> s[2];

    int vis[2][MAXN];
    std::deque<int> q;
    void dfs(int u, int color, int fa)
    {
        vis[color][u] = true;

        for (int i = 1; i <= q.size() && i <= 3; i++)
        {
            std::basic_string<int> x = {u};
            for (int j = 1; j <= i; j++)
            {
                x.push_back(q[q.size() - j]);
            }
            std::sort(x.begin(), x.end());
            s[color].insert(x);
        }

        q.push_back(u);

        for (auto v : e[color][u])
        {
            if (v != fa && vis[color][v] == false)
            {
                dfs(v, color, u);
            }
        }
    }

    void dfs2(int u, int color, int fa)
    {
        vis[color][u] = true;

        for (auto v : e[color][u])
        {
            if (v != fa)
            {
                s[color].insert({std::min(u, v), std::max(u, v)});
                if (vis[color][v] == false)
                {
                    dfs(v, color, u);
                }
            }
        }
    }

    int mian()
    {
        // std::freopen("graph.in", "r", stdin);
        // std::freopen("graph.out", "w", stdout);

        io.read(n, m);
        for (int i = 1; i <= m; i++)
        {
            int u = io.readi(), v = io.readi(), w = io.readi();

            deg[w][a[i] = u]++, deg[w][b[i] = v]++, c[i] = w;
        }

        for (int i = 1; i <= m; i++)
        {
            if (deg[0][a[i]] <= 2 && deg[1][a[i]] <= 2 && deg[0][b[i]] <= 2 && deg[1][b[i]] <= 2)
            {
                e[c[i]][a[i]].push_back(b[i]), e[c[i]][b[i]].push_back(a[i]);
            }
        }

        for (int i = 1; i <= n; i++)
        {
            for (int j = 0; j <= 1; j++)
            {
                if (deg[j][i] == 1 && vis[j][i] == false)
                {
                    q.clear(), dfs(i, j, 0);
                }
            }
        }

        for (int i = 1; i <= n; i++)
        {
            for (int j = 0; j <= 1; j++)
            {
                if (deg[j][i] == 2 && vis[j][i] == false)
                {
                    dfs2(i, j, 0);
                }
            }
        }

        int ans = n;
        for (auto i : s[0])
        {
            if (s[1].find(i) != s[1].end())
            {
                ans++;
            }
        }

        io.writeln(ans);

        return 0;
    }
} // namespace solution

int main()
{
    solution::mian();
    return 0;
}