Comma

AtCoder

IDabc195_c

Time2000ms

Memory256MB

Difficulty—

When Takahashi writes an integer, he uses a comma every third digit from the right. For example, $1234567$ is written as `1,234,567`, and $777$ is written as `777`. How many commas will be used in total when he writes each integer from $1$ through $N$ once? ## Constraints * $1 \leq N \leq 10^{15}$ * $N$ is an integer. ## Input Input is given from Standard Input in the following format: $N$ [samples]

Samples

Input #1

Output #1

11

No comma is used in writing $999$ or smaller numbers. One comma is used in writing each of the numbers from $1000$ through $1010$.
Thus, $11$ commas are used in total.

Input #2

27182818284590

Output #2

107730272137364

API Response (JSON)

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    "name": "Comma",
    "description": {
      "content": "When Takahashi writes an integer, he uses a comma every third digit from the right. For example, $1234567$ is written as `1,234,567`, and $777$ is written as `777`. How many commas will be used in tot",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
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    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc195_c"
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      "statement_type": "Markdown",
      "content": "When Takahashi writes an integer, he uses a comma every third digit from the right. For example, $1234567$ is written as `1,234,567`, and $777$ is written as `777`.\nHow many commas will be used in tot...",
      "is_translate": false,
      "language": "English"
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}

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