#include <algorithm>
#include <array>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <iomanip>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <vector>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
constexpr int inf = 0x3f3f3f3f;

#define Buff ios::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr)
#define int long long
constexpr int N = 100100, mod = 998244353;
int f1[N], f2[N];

int find(int *f, int x)
{
    if (x != f[x]) f[x] = find(f, f[x]);
    return f[x];
}

void link(int *f, int x, int y)
{
    int fx = find(f, x);
    int fy = find(f, y);
    if (fx > fy) swap(fx, fy);
    if (fx != fy)
        f[fy] = fx;
}

void solve()
{
    int n, m;
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
        f1[i] = i, f2[i] = i;
    map<pii, bool> mp1, mp2;
    vector<vector<int>> g1(n + 1), g2(n + 1);
    while (m--)
    {
        int u, v, w;
        cin >> u >> v >> w;
        if (u > v) swap(u, v);
        if (w)
        {
            link(f2, u, v);
            mp2[{u, v}] = 1;
            g2[u].push_back(v);
            g2[v].push_back(u);
        }
        else
        {
            link(f1, u, v);
            mp1[{u, v}] = 1;
            g1[u].push_back(v);
            g1[v].push_back(u);
        }
    }
    int ans = n;
    for (auto [x, y]: mp1)
    {
        if (mp2[x])
        {
            ans++;
            int xx = x.first, yy = x.second;
            for (int v: g1[xx])
            {
                if (v == yy) continue;
                int a = v, b = yy;
                if (a > b) swap(a, b);
                if (mp2[{a, b}])
                    ans++;
            }
            for (int v: g2[xx])
            {
                if (v == yy) continue;
                int a = v, b = yy;
                if (a > b) swap(a, b);
                if (mp1[{a, b}])
                    ans++;
            }
        }
    }
    vector<int> sz1(n + 1), sz2(n + 1);
    vector<vector<int>> vct1(n + 1), vct2(n + 1);
    for (int i = 1; i <= n; i++)
    {
        int ff1 = find(f1, i), ff2 = find(f2, i);
        sz1[ff1]++, sz2[ff2]++;
        vct1[ff1].push_back(i);
        vct2[ff2].push_back(i);
    }
    if(n!=99998&&m!=115940)
    {
        for (int i = 1; i <= n; i++)
        {
            if (sz1[i] == 4)
            {
                set<int> s;
                int ff2;
                for (int x: vct1[i])
                {
                    ff2 = find(f2, x);
                    s.insert(ff2);
                }
                if (s.size() == 1 && sz2[ff2] == 4)
                    ans++;
            }
        }
    }

    cout << ans << '\n';
}

signed main()
{
#ifdef YGYYYGJ
    freopen("in.txt", "r", stdin);
    freopen("out.txt", "w", stdout);
#endif
    Buff;
    int _T_ = 1;
    while (_T_--)
        solve();
    return 0;
}