Problem:


Score : 500 points

Problem Statement

You have a string S of length N.
Initially, all characters in S are 1s.

You will perform queries Q times.
In the i-th query, you are given two integers L_i, R_i and a character D_i (which is a digit).
Then, you must replace all characters from the L_i-th to the R_i-th (inclusive) with D_i.

After each query, read the string S as a decimal integer, and print its value modulo 998,244,353.

Constraints

1 \leq N, Q \leq 200,000

1 \leq L_i \leq R_i \leq N

1 \leq D_i \leq 9

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N Q
L_1 R_1 D_1
:
L_Q R_Q D_Q

Output

Print Q lines.
In the i-th line print the value of S after the i-th query, modulo 998,244,353.

Sample Input 1

8 5
3 6 2
1 4 7
3 8 3
2 2 2
4 5 1

Sample Output 1

11222211
77772211
77333333
72333333
72311333

Sample Input 2

200000 1
123 456 7

Sample Output 2

641437905

Don't forget to take the modulo.



Sample input:
8 5
3 6 2
1 4 7
3 8 3
2 2 2
4 5 1


Sample output:
11222211
77772211
77333333
72333333
72311333

Submission status: Time Limit Exceeded

Solution code:
from typing import Callable, List, TypeVar

S = TypeVar("S")  # 作用付きモノイドの型
F = TypeVar("F")  # 写像の型


class LazySegmentTree:
    """
    Lazy Segment Tree from https://atcoder.jp/contests/practice2/submissions/16775176
    References:
        https://tumoiyorozu.github.io/single-file-ac-library/document_ja/lazysegtree.html
        https://github.com/atcoder/ac-library/blob/master/atcoder/lazysegtree.hpp
    """

    __slots__ = ["e", "op", "id", "mapping", "composition", "_n", "_log", "_size", "tree", "lazy"]

    def __init__(self,
                 a: List[S],
                 e: S,
                 op: Callable[[S, S], S],
                 id_: F,
                 mapping: Callable[[F, S], S],
                 composition: Callable[[F, F], F]) -> None:
        self.e = e
        self.op = op
        self.id = id_
        self.mapping = mapping
        self.composition = composition

        self._n = len(a)
        self._log = (self._n - 1).bit_length()
        self._size = 1 << self._log

        self.tree = [e] * self._size + a + [e] * (self._size - self._n)
        for i in range(self._size - 1, 0, -1):
            self._update(i)

        self.lazy = [id_] * self._size

    def _update(self, k: int) -> None:
        """Update the value of a[k]."""
        self.tree[k] = self.op(self.tree[2 * k], self.tree[2 * k + 1])

    def _apply_all(self, k: int, f: F) -> None:
        self.tree[k] = self.mapping(f, self.tree[k])
        if k < self._size:
            self.lazy[k] = self.composition(f, self.lazy[k])

    def _push(self, k: int) -> None:
        self._apply_all(2 * k, self.lazy[k])
        self._apply_all(2 * k + 1, self.lazy[k])
        self.lazy[k] = self.id

    def set(self, k: int, x: S) -> None:
        """Assign x to a[k] in O(log n)."""
        assert 0 <= k < self._n

        k += self._size
        for i in range(self._log, 0, -1):
            self._push(k >> i)
        self.tree[k] = x
        for i in range(1, self._log + 1):
            self._update(k >> i)

    def get(self, k: int) -> S:
        """Return a[k] in O(1)."""
        assert 0 <= k < self._n

        k += self._size
        for i in range(self._log, 0, -1):
            self._push(k >> i)
        return self.tree[k]

    def prod(self, l: int, r: int) -> S:
        """Return op(a[l], ..., a[r - 1]). Return e, if l == r.
        Complexity: O(log n)
        """
        assert 0 <= l <= r <= self._n

        if l == r:
            return self.e

        l += self._size
        r += self._size
        for i in range(self._log, 0, -1):
            if ((l >> i) << i) != l:
                self._push(l >> i)
            if ((r >> i) << i) != r:
                self._push(r >> i)

        sml, smr = self.e, self.e
        while l < r:
            if l & 1:
                sml = self.op(sml, self.tree[l])
                l += 1
            if r & 1:
                r -= 1
                smr = self.op(self.tree[r], smr)
            l >>= 1
            r >>= 1
        return self.op(sml, smr)

    def prod_all(self) -> S:
        """Return op(a[0], ..., a[n - 1]. Return e if n == 0.
        Complexity: O(1)
        """
        return self.tree[1]

    def apply(self, k: int, f: F) -> None:
        """Apply a[p] = op_st(a[p], x) in O(log n)."""
        assert 0 <= k < self._n

        k += self._size
        for i in range(self._log, 0, -1):
            self._push(k >> i)
        self.tree[k] = self.mapping(f, self.tree[k])
        for i in range(1, self._log + 1):
            self._update(k >> i)

    def apply_range(self, l: int, r: int, f: F) -> None:
        """Apply a[i] = op_st(a[i], x) for all i = l..r-1 in O(log n)."""
        assert 0 <= l <= r <= self._n

        if l == r:
            return

        l += self._size
        r += self._size
        for i in range(self._log, 0, -1):
            if ((l >> i) << i) != l:
                self._push(l >> i)
            if ((r >> i) << i) != r:
                self._push((r - 1) >> i)

        l_tmp, r_tmp = l, r
        while l < r:
            if l & 1:
                self._apply_all(l, f)
                l += 1
            if r & 1:
                r -= 1
                self._apply_all(r, f)
            l >>= 1
            r >>= 1
        l, r = l_tmp, r_tmp

        for i in range(1, self._log + 1):
            if ((l >> i) << i) != l:
                self._update(l >> i)
            if ((r >> i) << i) != r:
                self._update((r - 1) >> i)


N, Q = map(int, input().split())

mod = 998244353

base = [None] * N
base[N-1] = (1, 1)

for i in range(N-2, -1, -1):
    b = (base[i+1][1] * 10) % mod
    base[i] = (b, b)


def op(l, r):
    return [(l[0]+r[0]) % mod, (l[1]+r[1]) % mod]


def mapping(l, r):
    if l == -1:
        return r
    return [(l*r[1]) % mod, r[1]]


def composition(l, r):
    if l == -1:
        return r
    return l


seg = LazySegmentTree(base, [0, 0], op, -1, mapping, composition)

for i in range(Q):
    L, R, D = map(int, input().split())
    seg.apply_range(L-1, R, D)
    print(seg.prod_all()[0])

Submission status: Time Limit Exceeded

Solution code:
# 方針 https://betrue12.hateblo.jp/entry/2020/09/27/013719
# ライブラリ　https://github.com/not522/ac-library-python/blob/master/atcoder/lazysegtree.py

import typing

class LazySegTree:
    def __init__(
            self,
            op: typing.Callable[[typing.Any, typing.Any], typing.Any],
            e: typing.Any,
            mapping: typing.Callable[[typing.Any, typing.Any], typing.Any],
            composition: typing.Callable[[typing.Any, typing.Any], typing.Any],
            id_: typing.Any,
            v: typing.Union[int, typing.List[typing.Any]]) -> None:
        self._op = op
        self._e = e
        self._mapping = mapping
        self._composition = composition
        self._id = id_

        if isinstance(v, int):
            v = [e] * v

        self._n = len(v)
        self._log = self._ceil_pow2(self._n)
        self._size = 1 << self._log
        self._d = [e] * (2 * self._size)
        self._lz = [self._id] * self._size
        for i in range(self._n):
            self._d[self._size + i] = v[i]
        for i in range(self._size - 1, 0, -1):
            self._update(i)

    def set(self, p: int, x: typing.Any) -> None:
        assert 0 <= p < self._n

        p += self._size
        for i in range(self._log, 0, -1):
            self._push(p >> i)
        self._d[p] = x
        for i in range(1, self._log + 1):
            self._update(p >> i)

    def get(self, p: int) -> typing.Any:
        assert 0 <= p < self._n

        p += self._size
        for i in range(self._log, 0, -1):
            self._push(p >> i)
        return self._d[p]

    def prod(self, left: int, right: int) -> typing.Any:
        assert 0 <= left <= right <= self._n

        if left == right:
            return self._e

        left += self._size
        right += self._size

        for i in range(self._log, 0, -1):
            if ((left >> i) << i) != left:
                self._push(left >> i)
            if ((right >> i) << i) != right:
                self._push(right >> i)

        sml = self._e
        smr = self._e
        while left < right:
            if left & 1:
                sml = self._op(sml, self._d[left])
                left += 1
            if right & 1:
                right -= 1
                smr = self._op(self._d[right], smr)
            left >>= 1
            right >>= 1

        return self._op(sml, smr)

    def all_prod(self) -> typing.Any:
        return self._d[1]

    def apply(self, left: int, right: typing.Optional[int] = None,
              f: typing.Optional[typing.Any] = None):
        assert f is not None

        if right is None:
            p = left
            assert 0 <= left < self._n

            p += self._size
            for i in range(self._log, 0, -1):
                self._push(p >> i)
            self._d[p] = self._mapping(f, self._d[p])
            for i in range(1, self._log + 1):
                self._update(p >> i)
        else:
            assert 0 <= left <= right <= self._n
            if left == right:
                return

            left += self._size
            right += self._size

            for i in range(self._log, 0, -1):
                if ((left >> i) << i) != left:
                    self._push(left >> i)
                if ((right >> i) << i) != right:
                    self._push((right - 1) >> i)

            l2 = left
            r2 = right
            while left < right:
                if left & 1:
                    self._all_apply(left, f)
                    left += 1
                if right & 1:
                    right -= 1
                    self._all_apply(right, f)
                left >>= 1
                right >>= 1
            left = l2
            right = r2

            for i in range(1, self._log + 1):
                if ((left >> i) << i) != left:
                    self._update(left >> i)
                if ((right >> i) << i) != right:
                    self._update((right - 1) >> i)

    def max_right(
            self, left: int, g: typing.Callable[[typing.Any], bool]) -> int:
        assert 0 <= left <= self._n
        assert g(self._e)

        if left == self._n:
            return self._n

        left += self._size
        for i in range(self._log, 0, -1):
            self._push(left >> i)

        sm = self._e
        first = True
        while first or (left & -left) != left:
            first = False
            while left % 2 == 0:
                left >>= 1
            if not g(self._op(sm, self._d[left])):
                while left < self._size:
                    self._push(left)
                    left *= 2
                    if g(self._op(sm, self._d[left])):
                        sm = self._op(sm, self._d[left])
                        left += 1
                return left - self._size
            sm = self._op(sm, self._d[left])
            left += 1

        return self._n

    def min_left(self, right: int, g: typing.Any) -> int:
        assert 0 <= right <= self._n
        assert g(self._e)

        if right == 0:
            return 0

        right += self._size
        for i in range(self._log, 0, -1):
            self._push((right - 1) >> i)

        sm = self._e
        first = True
        while first or (right & -right) != right:
            first = False
            right -= 1
            while right > 1 and right % 2:
                right >>= 1
            if not g(self._op(self._d[right], sm)):
                while right < self._size:
                    self._push(right)
                    right = 2 * right + 1
                    if g(self._op(self._d[right], sm)):
                        sm = self._op(self._d[right], sm)
                        right -= 1
                return right + 1 - self._size
            sm = self._op(self._d[right], sm)

        return 0

    def _update(self, k: int) -> None:
        self._d[k] = self._op(self._d[2 * k], self._d[2 * k + 1])

    def _all_apply(self, k: int, f: typing.Any) -> None:
        self._d[k] = self._mapping(f, self._d[k])
        if k < self._size:
            self._lz[k] = self._composition(f, self._lz[k])

    def _push(self, k: int) -> None:
        self._all_apply(2 * k, self._lz[k])
        self._all_apply(2 * k + 1, self._lz[k])
        self._lz[k] = self._id

    def _ceil_pow2(self, n: int) -> int:
        x = 0
        while (1 << x) < n:
            x += 1

        return x
      
N,Q=map(int,input().split())
mod = 998244353
A = [(pow(10,N-1-i,mod),)*2 for i in range(N)]

def op(x,y):
  return (x[0]+y[0]) % mod, (x[1]+y[1]) % mod
  
e = 0,0

def mapping(f,x):
  if f == id_: return x
  return f*x[1]%mod,x[1]

def composition(f,g):
  if f==id_: f,g = g,f
  return f

id_ = -1

seg = LazySegTree(op,e,mapping,composition,id_,A)
for i in range(Q):
  l,r,d = map(int,input().split())
  seg.apply(l-1,r,d)
  print(seg.all_prod()[0])

Submission status: Time Limit Exceeded

Solution code:
mod = 998244353
n, q = map(int, input().split())


class LazySegTree:
    def __init__(self, N):
        self.INF = 2**31-1
        self.N = N
        self.LV = (self.N - 1).bit_length()
        self.N0 = 2 ** self.LV
        self.data = [0] * (2 * self.N0)
        self.lazy = [0] * (2 * self.N0)
        self.size = [0] * (2 * self.N0)
        val = 1
        for i in range(self.N):
            self.size[self.N0 + self.N - 2 - i] = val
            val = val * 10 % mod
        for i in range(self.N0 - 2, -1, -1):
            self.size[i] = (self.size[2 * i + 1] + self.size[2 * i + 2]) % mod

    def gindex(self, l, r):
        L = (l + self.N0) >> 1; R = (r + self.N0) >> 1
        lc = 0 if l & 1 else (L & -L).bit_length()
        rc = 0 if r & 1 else (R & -R).bit_length()
        for i in range(self.LV):
            if rc <= i:
                yield R
            if L < R and lc <= i:
                yield L
            L >>= 1; R >>= 1

    # 遅延伝搬処理
    def propagates(self, *ids):
        for i in reversed(ids):
            v = self.lazy[i-1]
            if not v:
                continue
            self.lazy[2*i-1] = v; self.lazy[2*i] = v
            self.data[2*i-1] = v * self.size[2*i-1] % mod
            self.data[2*i] = v * self.size[2*i] % mod
            self.lazy[i-1] = 0

    # 区間[l, r)にxを加算
    def update(self, l, r, x):
        *ids, = self.gindex(l, r)
        self.propagates(*ids)

        L = self.N0 + l; R = self.N0 + r
        while L < R:
            if R & 1:
                R -= 1
                self.lazy[R-1] = x; self.data[R-1] = x * self.size[R-1] % mod
            if L & 1:
                self.lazy[L-1] = x; self.data[L-1] = x * self.size[L-1] % mod
                L += 1
            L >>= 1; R >>= 1
        for i in ids:
            self.data[i-1] = (self.data[2*i-1] + self.data[2*i]) % mod

    # 区間[l, r)内の最小値を求める
    def query(self, l, r):
        self.propagates(*self.gindex(l, r))
        L = self.N0 + l; R = self.N0 + r

        s = 0
        while L < R:
            if R & 1:
                R -= 1
                s = (s + self.data[R-1]) % mod
            if L & 1:
                s = (s + self.data[L-1]) % mod
                L += 1
            L >>= 1; R >>= 1
        return s


lst = LazySegTree(n)
lst.update(0, n, 1)

for _ in range(q):
    l, r, d = map(int, input().split())
    l -= 1
    lst.update(l, r, d)
    print(lst.query(0, n))

Submission status: Time Limit Exceeded

Solution code:
import sys

N,Q=map(int,input().split())

mod=998244353
inv9=pow(9,mod-2,mod)

#####segfunc#####
def segfunc(x, y):
    return (x[0]*y[1]+y[0])%mod,(x[1]*y[1])%mod
#################


#####updatefunc#####
def updatefunc(x, dat):
    return ((dat[1]-1)*inv9*x)%mod,dat[1]
#################


#####ide_ele#####
ide_ele = (0,1)
#################


class LazySegmentTree:
    """
    init(init_val, ide_ele): 配列init_valで初期化 O(N)
    update(l, r, x): 区間[l, r)をxに更新 O(logN)
    query(l, r): 区間[l, r)をsegfuncしたものを返す O(logN)
    """
    def __init__(self, init_val, segfunc,updatefunc, ide_ele):
        """
        init_val: 配列の初期値
        segfunc: 区間にしたい操作
        updatefunc: 更新時の操作
        ide_ele: 単位元
        num: n以上の最小の2のべき乗
        data: 値配列(1-index)
        lazy: 遅延配列(1-index)
        """
        n = len(init_val)
        self.segfunc = segfunc
        self.updatefunc = updatefunc
        self.ide_ele = ide_ele
        self.num = 1 << (n - 1).bit_length()
        self.data = [ide_ele] * 2 * self.num
        self.lazy = [None] * 2 * self.num
        # 配列の値を葉にセット
        for i in range(n):
            self.data[self.num + i] = init_val[i]
        # 構築していく
        for i in range(self.num - 1, 0, -1):
            self.data[i] = self.segfunc(self.data[2 * i], self.data[2 * i + 1])

    def gindex(self, l, r):
        """
        伝搬する対象の区間を求める
        lm: 伝搬する必要のある最大の左閉区間
        rm: 伝搬する必要のある最大の右開区間
        """
        l += self.num
        r += self.num
        lm = l >> (l & -l).bit_length()
        rm = r >> (r & -r).bit_length()

        while r > l:
            if l <= lm:
                yield l
            if r <= rm:
                yield r
            r >>= 1
            l >>= 1
        while l:
            yield l
            l >>= 1

    def propagates(self, *ids):
        """
        遅延伝搬処理
        ids: 伝搬する対象の区間 
        """
        for i in reversed(ids):
            v = self.lazy[i]
            if v is None:
                continue
            self.lazy[2 * i] = v
            self.lazy[2 * i + 1] = v
            self.data[2 * i] = self.updatefunc(v,self.data[2*i])
            self.data[2 * i + 1] = self.updatefunc(v,self.data[2*i+1])
            self.lazy[i] = None

    def update(self, l, r, x):
        """
        区間[l, r)の値をxに更新
        l, r: index(0-index)
        x: update value
        """
        *ids, = self.gindex(l, r)
        self.propagates(*ids)
        l += self.num
        r += self.num
        while l < r:
            if l & 1:
                self.lazy[l] = x
                self.data[l] = self.updatefunc(x,self.data[l])
                l += 1
            if r & 1:
                self.lazy[r - 1] = x
                self.data[r - 1] = self.updatefunc(x,self.data[r-1])
            r >>= 1
            l >>= 1
        for i in ids:
            self.data[i] = self.segfunc(self.data[2 * i], self.data[2 * i + 1])


    def query(self, l, r):
        """
        [l, r)のsegfuncしたものを得る
        l: index(0-index)
        r: index(0-index)
        """
        *ids, = self.gindex(l, r)
        self.propagates(*ids)

        res = self.ide_ele

        l += self.num
        r += self.num
        while l < r:
            if l & 1:
                res = self.segfunc(res, self.data[l])
                l += 1
            if r & 1:
                res = self.segfunc(res, self.data[r - 1])
            l >>= 1
            r >>= 1
        return res

t=LazySegmentTree([(1,10)]*N,segfunc,updatefunc,ide_ele)

for _ in range(Q):
    l,r,d=map(int,sys.stdin.readline().split())
    l-=1
    t.update(l,r,d)
    print(t.query(0,t.num)[0])

Submission status: Time Limit Exceeded

Solution code:
N,Q=map(int,input().split())

mod=998244353
inv9=pow(9,mod-2,mod)

#####segfunc#####
def segfunc(x, y):
    return (x[0]*y[1]+y[0])%mod,(x[1]*y[1])%mod
#################


#####updatefunc#####
def updatefunc(x, dat):
    return ((dat[1]-1)*inv9*x)%mod,dat[1]
#################


#####ide_ele#####
ide_ele = (0,1)
#################


class LazySegmentTree:
    """
    init(init_val, ide_ele): 配列init_valで初期化 O(N)
    update(l, r, x): 区間[l, r)をxに更新 O(logN)
    query(l, r): 区間[l, r)をsegfuncしたものを返す O(logN)
    """
    def __init__(self, init_val, segfunc,updatefunc, ide_ele):
        """
        init_val: 配列の初期値
        segfunc: 区間にしたい操作
        updatefunc: 更新時の操作
        ide_ele: 単位元
        num: n以上の最小の2のべき乗
        data: 値配列(1-index)
        lazy: 遅延配列(1-index)
        """
        n = len(init_val)
        self.segfunc = segfunc
        self.updatefunc = updatefunc
        self.ide_ele = ide_ele
        self.num = 1 << (n - 1).bit_length()
        self.data = [ide_ele] * 2 * self.num
        self.lazy = [None] * 2 * self.num
        # 配列の値を葉にセット
        for i in range(n):
            self.data[self.num + i] = init_val[i]
        # 構築していく
        for i in range(self.num - 1, 0, -1):
            self.data[i] = self.segfunc(self.data[2 * i], self.data[2 * i + 1])

    def gindex(self, l, r):
        """
        伝搬する対象の区間を求める
        lm: 伝搬する必要のある最大の左閉区間
        rm: 伝搬する必要のある最大の右開区間
        """
        l += self.num
        r += self.num
        lm = l >> (l & -l).bit_length()
        rm = r >> (r & -r).bit_length()

        while r > l:
            if l <= lm:
                yield l
            if r <= rm:
                yield r
            r >>= 1
            l >>= 1
        while l:
            yield l
            l >>= 1

    def propagates(self, *ids):
        """
        遅延伝搬処理
        ids: 伝搬する対象の区間 
        """
        for i in reversed(ids):
            v = self.lazy[i]
            if v is None:
                continue
            self.lazy[2 * i] = v
            self.lazy[2 * i + 1] = v
            self.data[2 * i] = self.updatefunc(v,self.data[2*i])
            self.data[2 * i + 1] = self.updatefunc(v,self.data[2*i+1])
            self.lazy[i] = None

    def update(self, l, r, x):
        """
        区間[l, r)の値をxに更新
        l, r: index(0-index)
        x: update value
        """
        *ids, = self.gindex(l, r)
        self.propagates(*ids)
        l += self.num
        r += self.num
        while l < r:
            if l & 1:
                self.lazy[l] = x
                self.data[l] = self.updatefunc(x,self.data[l])
                l += 1
            if r & 1:
                self.lazy[r - 1] = x
                self.data[r - 1] = self.updatefunc(x,self.data[r-1])
            r >>= 1
            l >>= 1
        for i in ids:
            self.data[i] = self.segfunc(self.data[2 * i], self.data[2 * i + 1])


    def query(self, l, r):
        """
        [l, r)のsegfuncしたものを得る
        l: index(0-index)
        r: index(0-index)
        """
        *ids, = self.gindex(l, r)
        self.propagates(*ids)

        res = self.ide_ele

        l += self.num
        r += self.num
        while l < r:
            if l & 1:
                res = self.segfunc(res, self.data[l])
                l += 1
            if r & 1:
                res = self.segfunc(res, self.data[r - 1])
            l >>= 1
            r >>= 1
        return res

t=LazySegmentTree([(1,10)]*N,segfunc,updatefunc,ide_ele)

for _ in range(Q):
    l,r,d=map(int,input().split())
    l-=1
    t.update(l,r,d)
    print(t.query(0,t.num)[0])

Submission status: Time Limit Exceeded

Solution code:
class lazySegTree:
    def __init__(self,n):
        self.n=2**((n-1).bit_length())
        self.node=[(0,1)]*(2*self.n-1)
        self.lazy=[0]*(2*self.n-1)
        self.mod=998244353
        self.inv9=pow(9,self.mod-2,self.mod)

        for i in range(self.n-1,self.n-1+n):
            self.node[i]=(1,10)
        
        for i in range(self.n-2,-1,-1):
            self.node[i]=self.op(self.node[2*i+1],self.node[2*i+2])

    def op(self,u,v):
        return (u[0]*v[1]+v[0])%self.mod,(u[1]*v[1])%self.mod
    
    def eval(self,i):
        if self.lazy[i]>0:
            self.node[i]=((self.node[i][1]-1)*self.inv9*self.lazy[i])%self.mod,self.node[i][1]

            if i<self.n-1:
                self.lazy[2*i+1]=self.lazy[i]
                self.lazy[2*i+2]=self.lazy[i]
            
            self.lazy[i]=0
    
    def update(self,l,r,val):
        self._update(l,r,val,0,0,self.n)
    
    def _update(self,l,r,val,i,li,ri):
        self.eval(i)
        if r<=li or ri<=l:
            return
        
        if l<=li and ri<=r:
            self.lazy[i]=val
            self.eval(i)
        else:
            self._update(l,r,val,2*i+1,li,(li+ri)//2)
            self._update(l,r,val,2*i+2,(li+ri)//2,ri)
            self.node[i]=self.op(self.node[2*i+1],self.node[2*i+2])
    
    def prt(self):
        self.eval(0)
        print(self.node[0][0])

n,q=map(int,input().split())
t=lazySegTree(n)

for _ in range(q):
    l,r,d=map(int,input().split())
    l-=1
    t.update(l,r,d)
    t.prt()

Submission status: Time Limit Exceeded

Solution code:
import sys
import math
from collections import defaultdict, deque, Counter
from copy import deepcopy
from bisect import bisect, bisect_right, bisect_left
from heapq import heapify, heappop, heappush
    
input = sys.stdin.readline
def RD(): return input().rstrip()
def F(): return float(input().rstrip())
def I(): return int(input().rstrip())
def MI(): return map(int, input().split())
def MF(): return map(float,input().split())
def LI(): return list(map(int, input().split()))
def TI(): return tuple(map(int, input().split()))
def LF(): return list(map(float,input().split()))
def Init(H, W, num): return [[num for i in range(W)] for j in range(H)]

class BIT():
    # 作りたい要素数nで初期化, 1-index
    # 使用するインスタンス変数の初期化
    def __init__(self, n):
        self.n = n
        self.bit = [0] * (n+1)

    #bit_indexにxをO(log(n))で加算する
    def add(self,i,x):
        #if(i<=0 or i>n):return iに0以下の数字は代入しない
        while i <= self.n:
            self.bit[i] += x
            i += (i & -i)
    #bit_1 + bit_2 + …  + bit_n をO(log(n))で求める
    def sum(self,i):
        s = 0
        #iに0以下の数字は代入しない。
        while i > 0:
            s+=self.bit[i]
            i -= (i & -i)
        return s
    
    def rangesum(self,i,k):
        return self.sum(k) - self.sum(i)
    #a_1 + a_2 + … + a_i >= x となるような最小のiを求める(a_k >= 0)
    #xが0以下の場合は該当するものなし→0を返す
    def lower_bound(self,x):
        if x <= 0:
            return 0
        else:
            i = 0
            r = 1
            #最大としてありうる区間の長さを取得する
            #n以下の最小の二乗のべき(BITで管理する数列の区間で最大のもの)を求める
            while(r<self.n):
                r=r<<1
            len = r
            while len > 0:
                if(i+len<self.n and self.bit[i+len]<x):
                    x-=self.bit[i+len]
                    i+=len
                len = len >> 1
            return i+1
    
def main():
    N, Q = MI()
    L = [1] * N
    D = [0] * N
    mod = 998244353
    ans = 0
    temp = 1
    for i in range(N):
        temp = temp % mod
        D[i] = temp
        ans += temp
        temp *= 10

    for i in range(Q):
        l, r, d = MI()
        l = N-l+1
        r = N-r
        temp = 1
        for j in range(r, l):
            temp2 = L[j]
            L[j] = d
            ans += (d-temp2) * D[j]
            ans = ans % mod
        print(ans%mod)
        
if __name__ == "__main__":
    main()