#include <algorithm>
#include <iostream>
#include <vector>


template <typename TDATA, typename TLAZY, typename TRET, typename TQUERY>
struct LazySegmentTree
{
    TLAZY zero_lazy;
    TRET zero_ret;
    int N;
    int head;
    std::vector<TDATA> data;
    std::vector<TLAZY> lazy;

    // Here, you have to calculate data[pos] from children (data[l], data[r]),
    // Assumptions: `lazy[pos] = lazy[l] = lazy[r] = zero_lazy`
    virtual void merge_data(int pos) = 0;

    // Here, you must propagate lazy[pos] and update data[pos] by reflecting lazy[pos], without inconsistency
    // After this, lazy[pos] must be zero_lazy.
    virtual void reflect_lazy(int pos) = 0;

    // operate d to lazy[pos] (merge two TLAZY's)
    virtual void overlap_lazy(int pos, const TLAZY &d) = 0;

    // Assumption: `lazy[pos] = zero_lazy`
    virtual TRET data2ret(int pos, const TQUERY &query) = 0;

    virtual TRET merge_ret(const TRET &l, const TRET &r, const TQUERY &query) = 0;

    ////// general description //////
    LazySegmentTree() = default;
    void initialize(const std::vector<TDATA> &data_init, const TDATA &zero_data, const TLAZY &zero_lazy_, const TRET &zero_ret_)
    {
        N = data_init.size();
        head = 1;
        while (head < N) head <<= 1;
        zero_lazy = zero_lazy_;
        zero_ret = zero_ret_;
        data.assign(head * 2, zero_data);
        lazy.assign(head * 2, zero_lazy);
        std::copy(data_init.begin(), data_init.end(), data.begin() + head);
        for (int pos = head; --pos;) merge_data(pos);
    }

    void _update(int begin, int end, const TLAZY &delay, int pos, int l, int r)
    {
        // Operate `delay` to the node pos
        // After this, lazy[pos] MUST be zero so that merge_data() works correctly
        if (begin <= l and r <= end) { // Update whole [l, r) by delay
            overlap_lazy(pos, delay);
            reflect_lazy(pos);
        }
        else if (begin < r and l < end) { // Update somewhere in [l, r)
            reflect_lazy(pos);
            _update(begin, end, delay, pos * 2, l, (l + r) / 2);
            _update(begin, end, delay, pos * 2 + 1, (l + r) / 2, r);
            merge_data(pos);
        }
        else reflect_lazy(pos);
    }

    void update(int begin, int end, const TLAZY &delay) {
        _update(begin, end, delay, 1, 0, head);
    }

    TRET _get(int begin, int end, int pos, int l, int r, const TQUERY &query) // Get value in [begin, end)
    {
        reflect_lazy(pos);
        if (begin <= l and r <= end) return data2ret(pos, query);
        else if (begin < r and l < end) {
            TRET vl = _get(begin, end, pos * 2, l, (l + r) / 2, query);
            TRET vr = _get(begin, end, pos * 2 + 1, (l + r) / 2, r, query);
            return merge_ret(vl, vr, query);
        }
        else return zero_ret;
    }
    TRET get(int begin, int end, const TQUERY &query)
    {
        return _get(begin, end, 1, 0, head, query);
    }
};

template <typename T>
struct RangeUpdateRangeSum : public LazySegmentTree<std::pair<T, size_t>, std::pair<T, bool>, T, std::tuple<>>
{
    using TDATA = std::pair<T, size_t>;
    using TLAZY = std::pair<T, bool>;
    using Empty = std::tuple<>;
    using SegTree = LazySegmentTree<TDATA, TLAZY, T, Empty>;
    using SegTree::data;
    using SegTree::lazy;
    void merge_data(int i) override
    {
        data[i] = std::make_pair(data[i * 2].first + data[i * 2 + 1].first, data[i * 2].second + data[i * 2 + 1].second);
    };
    void reflect_lazy(int i) override
    {
        if (lazy[i].second)
        {
            if (i < SegTree::head) overlap_lazy(i * 2, lazy[i]), overlap_lazy(i * 2 + 1, lazy[i]);
            data[i].first = lazy[i].first * data[i].second;
        }
        lazy[i].second = false;
    }
    void overlap_lazy(int i, const TLAZY &p) override { if (p.second) lazy[i] = p; }
    T data2ret(int i, const Empty &) override { return data[i].first; }
    T merge_ret(const T &l, const T &r, const Empty &) override { return l + r; }
    void update(int l, int r, T val) { SegTree::update(l, r, TLAZY(val, true)); }
    T get(int l, int r) { return SegTree::get(l, r, {}); }
    RangeUpdateRangeSum(const std::vector<T> &seq) : SegTree::LazySegmentTree()
    {
        std::vector<TDATA> vec;
        std::transform(seq.begin(), seq.end(), std::back_inserter(vec), [](T x){ return TDATA(x, 1); });
        // for (const auto &x : seq) vec.emplace_back(x, 1);
        SegTree::initialize(vec, TDATA(0, 0), TLAZY(0, false), 0);
    }
};

#include <bits/stdc++.h>
using namespace std;
using lint = long long;
using pint = pair<int, int>;
using plint = pair<lint, lint>;
struct fast_ios { fast_ios(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_;
#define ALL(x) (x).begin(), (x).end()
#define FOR(i, begin, end) for(int i=(begin),i##_end_=(end);i<i##_end_;i++)
#define IFOR(i, begin, end) for(int i=(end)-1,i##_begin_=(begin);i>=i##_begin_;i--)
#define REP(i, n) FOR(i,0,n)
#define IREP(i, n) IFOR(i,0,n)
template <typename T> void ndarray(vector<T> &vec, int len) { vec.resize(len); }
template <typename T, typename... Args> void ndarray(vector<T> &vec, int len, Args... args) { vec.resize(len); for (auto &v : vec) ndarray(v, args...); }
template <typename V, typename T> void ndfill(V &x, const T &val) { x = val; }
template <typename V, typename T> void ndfill(vector<V> &vec, const T &val) { for (auto &v : vec) ndfill(v, val); }
template <typename T> bool chmax(T &m, const T q) { if (m < q) {m = q; return true;} else return false; }
template <typename T> bool chmin(T &m, const T q) { if (m > q) {m = q; return true;} else return false; }
template <typename T1, typename T2> pair<T1, T2> operator+(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first + r.first, l.second + r.second); }
template <typename T1, typename T2> pair<T1, T2> operator-(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first - r.first, l.second - r.second); }
template <typename T> vector<T> srtunq(vector<T> vec) { sort(vec.begin(), vec.end()), vec.erase(unique(vec.begin(), vec.end()), vec.end()); return vec; }
template <typename T> istream &operator>>(istream &is, vector<T> &vec) { for (auto &v : vec) is >> v; return is; }
template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec) { os << '['; for (auto v : vec) os << v << ','; os << ']'; return os; }
template <typename T> ostream &operator<<(ostream &os, const deque<T> &vec) { os << "deq["; for (auto v : vec) os << v << ','; os << ']'; return os; }
template <typename T> ostream &operator<<(ostream &os, const set<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T> ostream &operator<<(ostream &os, const unordered_set<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T> ostream &operator<<(ostream &os, const multiset<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T> ostream &operator<<(ostream &os, const unordered_multiset<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &pa) { os << '(' << pa.first << ',' << pa.second << ')'; return os; }
template <typename TK, typename TV> ostream &operator<<(ostream &os, const map<TK, TV> &mp) { os << '{'; for (auto v : mp) os << v.first << "=>" << v.second << ','; os << '}'; return os; }
template <typename TK, typename TV> ostream &operator<<(ostream &os, const unordered_map<TK, TV> &mp) { os << '{'; for (auto v : mp) os << v.first << "=>" << v.second << ','; os << '}'; return os; }
#ifdef HITONANODE_LOCAL
#define dbg(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ") " << __FILE__ << endl
#else
#define dbg(x)
#endif

template <int mod>
struct ModInt
{
    using lint = long long;
    int val;
    constexpr ModInt() : val(0) {}
    constexpr ModInt &_setval(lint v) { val = (v >= mod ? v - mod : v); return *this; }
    constexpr ModInt(lint v) { _setval(v % mod + mod); }
    explicit operator bool() const { return val != 0; }
    constexpr ModInt operator+(const ModInt &x) const { return ModInt()._setval((lint)val + x.val); }
    constexpr ModInt operator-(const ModInt &x) const { return ModInt()._setval((lint)val - x.val + mod); }
    constexpr ModInt operator*(const ModInt &x) const { return ModInt()._setval((lint)val * x.val % mod); }
    constexpr ModInt operator/(const ModInt &x) const { return ModInt()._setval((lint)val * x.inv() % mod); }
    constexpr ModInt operator-() const { return ModInt()._setval(mod - val); }
    constexpr ModInt &operator+=(const ModInt &x) { return *this = *this + x; }
    constexpr ModInt &operator-=(const ModInt &x) { return *this = *this - x; }
    constexpr ModInt &operator*=(const ModInt &x) { return *this = *this * x; }
    constexpr ModInt &operator/=(const ModInt &x) { return *this = *this / x; }
    friend constexpr ModInt operator+(lint a, const ModInt &x) { return ModInt()._setval(a % mod + x.val); }
    friend constexpr ModInt operator-(lint a, const ModInt &x) { return ModInt()._setval(a % mod - x.val + mod); }
    friend constexpr ModInt operator*(lint a, const ModInt &x) { return ModInt()._setval(a % mod * x.val % mod); }
    friend constexpr ModInt operator/(lint a, const ModInt &x) { return ModInt()._setval(a % mod * x.inv() % mod); }
    constexpr bool operator==(const ModInt &x) const { return val == x.val; }
    constexpr bool operator!=(const ModInt &x) const { return val != x.val; }
    bool operator<(const ModInt &x) const { return val < x.val; }  // To use std::map<ModInt, T>
    friend std::istream &operator>>(std::istream &is, ModInt &x) { lint t; is >> t; x = ModInt(t); return is; }
    friend std::ostream &operator<<(std::ostream &os, const ModInt &x) { os << x.val;  return os; }
    constexpr lint power(lint n) const {
        lint ans = 1, tmp = this->val;
        while (n) {
            if (n & 1) ans = ans * tmp % mod;
            tmp = tmp * tmp % mod;
            n /= 2;
        }
        return ans;
    }
    constexpr lint inv() const { return this->power(mod - 2); }
    constexpr ModInt operator^(lint n) const { return ModInt(this->power(n)); }
    constexpr ModInt &operator^=(lint n) { return *this = *this ^ n; }

    inline ModInt fac() const {
        static std::vector<ModInt> facs;
        int l0 = facs.size();
        if (l0 > this->val) return facs[this->val];

        facs.resize(this->val + 1);
        for (int i = l0; i <= this->val; i++) facs[i] = (i == 0 ? ModInt(1) : facs[i - 1] * ModInt(i));
        return facs[this->val];
    }

    ModInt doublefac() const {
        lint k = (this->val + 1) / 2;
        if (this->val & 1) return ModInt(k * 2).fac() / ModInt(2).power(k) / ModInt(k).fac();
        else return ModInt(k).fac() * ModInt(2).power(k);
    }

    ModInt nCr(const ModInt &r) const {
        if (this->val < r.val) return ModInt(0);
        return this->fac() / ((*this - r).fac() * r.fac());
    }
};
using mint = ModInt<1000000007>;

int main()
{
    int N, M;
    cin >> N >> M;
    vector<pint> r2lp(N + 1, pint(-1, -1));

    vector<mint> v(N + 1, 0);
    v[0] = mint(2).power(N);
    RangeUpdateRangeSum<mint> segtree(v);

    while (M--)
    {
        int l, r, p;
        cin >> l >> r >> p;
        r2lp[r] = make_pair(l, p);
    }
    mint inv2 = mint(2).inv();
    int cnt = 0;
    FOR(r, 1, N + 1)
    {
        auto [l, p] = r2lp[r];
        if (l == -1)
        {
            segtree.update(r, r + 1, segtree.get(0, r) * inv2);
            continue;
        }
        if (p == 0)
        {
            segtree.update(r, r + 1, segtree.get(0, r) * inv2);
            segtree.update(0, l, 0);
        }
        else
        {
            segtree.update(l, r, 0);
            cnt++;
        }
    }
    cout << segtree.get(0, N + 1) / mint(2).power(cnt) << '\n';
}