#include <bits/stdc++.h>

#ifdef DEBUG
#include <Mylib/Debug/debug.cpp>
#else
#define dump(...) ((void)0)
#endif

template <typename T, typename U>
bool chmin(T &a, const U &b){
  return (a > b ? a = b, true : false);
}

template <typename T, typename U>
bool chmax(T &a, const U &b){
  return (a < b ? a = b, true : false);
}

template <typename T, size_t N, typename U>
void fill_array(T (&a)[N], const U &v){
  std::fill((U*)a, (U*)(a + N), v);
}

template <typename T, size_t N, size_t I = N>
auto make_vector(const std::array<int, N> &a, T value = T()){
  static_assert(I >= 1);
  static_assert(N >= 1);
  if constexpr (I == 1){
    return std::vector<T>(a[N - I], value);
  }else{
    return std::vector(a[N - I], make_vector<T, N, I - 1>(a, value));
  }
}

template <typename T>
std::ostream& operator<<(std::ostream &s, const std::vector<T> &a){
  for(auto it = a.begin(); it != a.end(); ++it){
    if(it != a.begin()) s << " ";
    s << *it;
  }
  return s;
}

template <typename T>
std::istream& operator>>(std::istream &s, std::vector<T> &a){
  for(auto &x : a) s >> x;
  return s;
}

namespace haar_lib {
  template <int32_t M>
  class modint {
    uint32_t val;

  public:
    constexpr static auto mod(){return M;}

    constexpr modint(): val(0){}
    constexpr modint(int64_t n){
      if(n >= M) val = n % M;
      else if(n < 0) val = n % M + M;
      else val = n;
    }

    constexpr auto& operator=(const modint &a){val = a.val; return *this;}
    constexpr auto& operator+=(const modint &a){
      if(val + a.val >= M) val = (uint64_t)val + a.val - M;
      else val += a.val;
      return *this;
    }
    constexpr auto& operator-=(const modint &a){
      if(val < a.val) val += M;
      val -= a.val;
      return *this;
    }
    constexpr auto& operator*=(const modint &a){
      val = (uint64_t)val * a.val % M;
      return *this;
    }
    constexpr auto& operator/=(const modint &a){
      val = (uint64_t)val * a.inv().val % M;
      return *this;
    }

    constexpr auto operator+(const modint &a) const {return modint(*this) += a;}
    constexpr auto operator-(const modint &a) const {return modint(*this) -= a;}
    constexpr auto operator*(const modint &a) const {return modint(*this) *= a;}
    constexpr auto operator/(const modint &a) const {return modint(*this) /= a;}

    constexpr bool operator==(const modint &a) const {return val == a.val;}
    constexpr bool operator!=(const modint &a) const {return val != a.val;}

    constexpr auto& operator++(){*this += 1; return *this;}
    constexpr auto& operator--(){*this -= 1; return *this;}

    constexpr auto operator++(int){auto t = *this; *this += 1; return t;}
    constexpr auto operator--(int){auto t = *this; *this -= 1; return t;}

    constexpr static modint pow(int64_t n, int64_t p){
      if(p < 0) return pow(n, -p).inv();

      int64_t ret = 1, e = n % M;
      for(; p; (e *= e) %= M, p >>= 1) if(p & 1) (ret *= e) %= M;
      return ret;
    }

    constexpr static modint inv(int64_t a){
      int64_t b = M, u = 1, v = 0;

      while(b){
        int64_t t = a / b;
        a -= t * b; std::swap(a, b);
        u -= t * v; std::swap(u, v);
      }

      u %= M;
      if(u < 0) u += M;

      return u;
    }

    constexpr static auto frac(int64_t a, int64_t b){return modint(a) / modint(b);}

    constexpr auto pow(int64_t p) const {return pow(val, p);}
    constexpr auto inv() const {return inv(val);}

    friend constexpr auto operator-(const modint &a){return modint(M - a.val);}

    friend constexpr auto operator+(int64_t a, const modint &b){return modint(a) + b;}
    friend constexpr auto operator-(int64_t a, const modint &b){return modint(a) - b;}
    friend constexpr auto operator*(int64_t a, const modint &b){return modint(a) * b;}
    friend constexpr auto operator/(int64_t a, const modint &b){return modint(a) / b;}

    friend std::istream& operator>>(std::istream &s, modint<M> &a){s >> a.val; return s;}
    friend std::ostream& operator<<(std::ostream &s, const modint<M> &a){s << a.val; return s;}

    template <int N>
    static auto div(){
      static auto value = inv(N);
      return value;
    }

    explicit operator int32_t() const noexcept {return val;}
    explicit operator int64_t() const noexcept {return val;}
  };
}

namespace haar_lib {
  template <typename MonoidGet, typename MonoidUpdate, template <typename, typename> typename Connector>
  class lazy_segment_tree {
    using value_type_get = typename MonoidGet::value_type;
    using value_type_update = typename MonoidUpdate::value_type;
    Connector<MonoidGet, MonoidUpdate> M;
    MonoidGet M_get;
    MonoidUpdate M_update;

    const int depth, size, hsize;
    std::vector<value_type_get> data;
    std::vector<value_type_update> lazy;

    void propagate(int i){
      if(lazy[i] == M_update()) return;
      if(i < hsize){
        lazy[i << 1 | 0] = M_update(lazy[i], lazy[i << 1 | 0]);
        lazy[i << 1 | 1] = M_update(lazy[i], lazy[i << 1 | 1]);
      }
      int len = hsize >> (31 - __builtin_clz(i));
      data[i] = M(data[i], lazy[i], len);
      lazy[i] = M_update();
    }

    void propagate_top_down(int i){
      std::vector<int> temp;
      while(i > 1){
        i >>= 1;
        temp.push_back(i);
      }

      for(auto it = temp.rbegin(); it != temp.rend(); ++it) propagate(*it);
    }

    void bottom_up(int i){
      while(i > 1){
        i >>= 1;
        propagate(i << 1 | 0);
        propagate(i << 1 | 1);
        data[i] = M_get(data[i << 1 | 0], data[i << 1 | 1]);
      }
    }

  public:
    lazy_segment_tree(){}
    lazy_segment_tree(int n):
      depth(n > 1 ? 32 - __builtin_clz(n - 1) + 1 : 1),
      size(1 << depth),
      hsize(size / 2),
      data(size, M_get()),
      lazy(size, M_update())
    {}

    void update(int l, int r, const value_type_update &x){
      propagate_top_down(l + hsize);
      if(r < hsize) propagate_top_down(r + hsize);

      int L = l + hsize, R = r + hsize;

      while(L < R){
        if(R & 1){
          --R;
          lazy[R] = M_update(x, lazy[R]);
          propagate(R);
        }
        if(L & 1){
          lazy[L] = M_update(x, lazy[L]);
          propagate(L);
          ++L;
        }
        L >>= 1;
        R >>= 1;
      }

      bottom_up(l + hsize);
      if(r < hsize) bottom_up(r + hsize);
    }

    void update(int i, const value_type_update &x){update(i, i + 1, x);}

    value_type_get fold(int l, int r){
      propagate_top_down(l + hsize);
      if(r < hsize) propagate_top_down(r + hsize);

      value_type_get ret_left = M_get(), ret_right = M_get();

      int L = l + hsize, R = r + hsize;

      while(L < R){
        if(R & 1){
          --R;
          propagate(R);
          ret_right = M_get(data[R], ret_right);
        }
        if(L & 1){
          propagate(L);
          ret_left = M_get(ret_left, data[L]);
          ++L;
        }
        L >>= 1;
        R >>= 1;
      }

      return M_get(ret_left, ret_right);
    }

    value_type_get operator[](int i){return fold(i, i + 1);}

    template <typename T>
    void init(const T &val){
      init_with_vector(std::vector<T>(hsize, val));
    }

    template <typename T>
    void init_with_vector(const std::vector<T> &val){
      data.assign(size, M_get());
      lazy.assign(size, M_update());
      for(int i = 0; i < (int)val.size(); ++i) data[hsize + i] = (value_type_get)val[i];
      for(int i = hsize - 1; i > 0; --i) data[i] = M_get(data[i << 1 | 0], data[i << 1 | 1]);
    }
  };
}

namespace haar_lib {
  template <typename T>
  struct update_monoid {
    using value_type = std::optional<T>;
    value_type operator()() const {return std::nullopt;}
    value_type operator()(const value_type &a, const value_type &b) const {return (a ? a : b);}
  };
}


namespace haar_lib {
  namespace rolling_hash_monoid_impl {
    template <typename T, int64_t Base>
    struct inner_value {
      constexpr static int base = Base;
      T hash, power;
      inner_value(){}
      inner_value(int64_t hash, int64_t power): hash(hash), power(power){}
      inner_value(T a): hash(a), power(Base){}
    };
  }

  template <typename T, int Base>
  struct rolling_hash_monoid {
    using value_type = rolling_hash_monoid_impl::inner_value<T, Base>;

    value_type operator()() const {
      value_type ret(0, 1);
      return ret;
    }

    value_type operator()(const value_type &a, const value_type &b) const {
      value_type ret;
      ret.hash = a.hash + b.hash * a.power;
      ret.power = a.power * b.power;
      return ret;
    }
  };
}

template <typename MonoidGet, typename MonoidUpdate>
struct connector {
  using value_type_get = typename MonoidGet::value_type;
  using value_type_update = typename MonoidUpdate::value_type;

  value_type_get operator()(value_type_get a, value_type_update b, int) const {
    if(b){
      a.hash = b.value() * (a.power - 1) / (value_type_get::base - 1);
    }
    return a;
  }
};

namespace haar_lib {
  template <typename Monoid>
  struct dual_monoid {
    using value_type = typename Monoid::value_type;
    const static Monoid M;
    value_type operator()() const {return M();}
    value_type operator()(const value_type &a, const value_type &b) const {return M(b, a);}
  };
}


namespace haar_lib {}

namespace solver {
  using namespace haar_lib;

  constexpr int m1000000007 = 1000000007;
  constexpr int m998244353 = 998244353;

  void init(){
    std::cin.tie(0);
    std::ios::sync_with_stdio(false);
    std::cout << std::fixed << std::setprecision(12);
    std::cerr << std::fixed << std::setprecision(12);
    std::cin.exceptions(std::ios_base::failbit);
  }

  using mint = modint<m998244353>;

  void solve(){
    int N, Q; std::cin >> N >> Q;

    lazy_segment_tree<dual_monoid<rolling_hash_monoid<mint, 10>>, update_monoid<mint>, connector> seg(N);
    seg.init(1);

    while(Q--){
      int L, R, D; std::cin >> L >> R >> D;
      --L;

      seg.update(L, R, D);

      std::cout << seg.fold(0, N).hash << "\n";
    }
  }
}

int main(){
  solver::init();
  while(true){
    try{
      solver::solve();
    }catch(const std::istream::failure &e){
      break;
    }
  }
  return 0;
}


Measured memory_bytes: 12452