Replace Digits

AtCoder

IDabl_e

Time2000ms

Memory256MB

Difficulty—

You have a string $S$ of length $N$. Initially, all characters in $S$ are `1`s. 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: $N$ $Q$ $L_1$ $R_1$ $D_1$ $:$ $L_Q$ $R_Q$ $D_Q$ [samples]

Samples

Input #1

Output #1

Input #2

200000 1
123 456 7

Output #2

641437905

Don't forget to take the modulo.

API Response (JSON)

{
  "problem": {
    "name": "Replace Digits",
    "description": {
      "content": "You have a string $S$ of length $N$. Initially, all characters in $S$ are `1`s. You will perform queries $Q$ times. In the $i$\\-th query, you are given two integers $L_i, R_i$ and a character $D_i$ (w",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abl_e"
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  "statements": [
    {
      "statement_type": "Markdown",
      "content": "You have a string $S$ of length $N$. Initially, all characters in $S$ are `1`s.\nYou will perform queries $Q$ times. In the $i$\\-th query, you are given two integers $L_i, R_i$ and a character $D_i$ (w...",
      "is_translate": false,
      "language": "English"
    }
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}

Full JSON Raw Segments