#include <chrono>
#include <iostream>
#include <random>
#include <tuple>
#include <vector>
using namespace std;

#include <atcoder/modint>
using mint = atcoder::modint1000000007;

mt19937 mt(530629);
uniform_int_distribution<int> rndgen(0, mint::mod() - 1);

template <class T> int rank_of_matrix(std::vector<std::vector<T>> &M) {
    const int N = M.size();
    int rank = 0;
    for (int i = 0; i < N; ++i) {
        int ti = i;
        while (ti < N and M[ti][i] == 0) ti++;
        if (ti == N) continue;
        ++rank;
        M[i].swap(M[ti]);
        T inv = T(1) / M[i][i];
        for (int j = i + 1; j < N; ++j) M[i][j] *= inv;
        for (int h = 0; h < N; ++h) {
            if (i == h) continue;
            const T c = -M[h][i];
            for (int j = i + 1; j < N; ++j) M[h][j] += M[i][j] * c;
        }
    }
    return rank;
}



int solve(int N, const vector<tuple<int, int, int>> &uvws) {
    vector M(N, vector<mint>(N));
    for (auto [u, v, w] : uvws) {
        mint x = rndgen(mt);
        M[u][v] += x;
        M[v][w] += x;
        M[w][u] += x;
        M[v][u] -= x;
        M[w][v] -= x;
        M[u][w] -= x;
    }
    return rank_of_matrix(M) / 2;
}

int main() {
    int N, M;
    cin >> N >> M;
    vector<tuple<int, int, int>> uvws;
    while (M--) {
        int u, v, w;
        cin >> u >> v >> w;
        u--, v--, w--;
        uvws.emplace_back(u, v, w);
    }
    cout << max(solve(N, uvws), solve(N, uvws)) << '\n';
}