10yen Stamp

AtCoder

IDabc233_a

Time2000ms

Memory256MB

Difficulty—

Takahashi wants to send a letter to Santa Claus. He has an envelope with an $X$\-yen (Japanese currency) stamp stuck on it. To be delivered to Santa Claus, the envelope must have stamps in a total value of at least $Y$ yen. Takahashi will put some more $10$\-yen stamps so that the envelope will have stamps worth at least $Y$ yen in total. At least how many more $10$\-yen stamps does Takahashi need to put on the envelope? ## Constraints * $X$ and $Y$ are integers. * $1 \le X,Y \le 1000$ ## Input Input is given from Standard Input in the following format: $X$ $Y$ [samples]

Samples

Input #1

80 94

Output #1

2

*   After adding zero $10$\-yen stamps to the $80$\-yen stamp, the total is $80$ yen, which is less than the required amount of $94$ yen.
*   After adding one $10$\-yen stamp to the $80$\-yen stamp, the total is $90$ yen, which is less than the required amount of $94$ yen.
*   After adding two $10$\-yen stamps to the $80$\-yen stamp, the total is $100$ yen, which is not less than the required amount of $94$ yen.

Input #2

1000 63

Output #2

0

The envelope may already have a stamp with enough value.

Input #3

270 750

Output #3

API Response (JSON)

{
  "problem": {
    "name": "10yen Stamp",
    "description": {
      "content": "Takahashi wants to send a letter to Santa Claus. He has an envelope with an $X$\\-yen (Japanese currency) stamp stuck on it.   To be delivered to Santa Claus, the envelope must have stamps in a total v",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc233_a"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "Takahashi wants to send a letter to Santa Claus. He has an envelope with an $X$\\-yen (Japanese currency) stamp stuck on it.  \nTo be delivered to Santa Claus, the envelope must have stamps in a total v...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

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