Power Socket

AtCoder

IDabc139_b

Time2000ms

Memory256MB

Difficulty—

Takahashi's house has only one socket. Takahashi wants to extend it with some number of power strips, each with $A$ sockets, into $B$ or more empty sockets. One power strip with $A$ sockets can extend one empty socket into $A$ empty sockets. Find the minimum number of power strips required. ## Constraints * All values in input are integers. * $2 \leq A \leq 20$ * $1 \leq B \leq 20$ ## Input Input is given from Standard Input in the following format: $A$ $B$ [samples]

Samples

Input #1

4 10

Output #1

3

$3$ power strips, each with $4$ sockets, extend the socket into $10$ empty sockets.

Input #2

8 9

Output #2

2

$2$ power strips, each with $8$ sockets, extend the socket into $15$ empty sockets.

Input #3

8 8

Output #3

API Response (JSON)

{
  "problem": {
    "name": "Power Socket",
    "description": {
      "content": "Takahashi's house has only one socket. Takahashi wants to extend it with some number of power strips, each with $A$ sockets, into $B$ or more empty sockets. One power strip with $A$ sockets can extend",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc139_b"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "Takahashi's house has only one socket.\nTakahashi wants to extend it with some number of power strips, each with $A$ sockets, into $B$ or more empty sockets.\nOne power strip with $A$ sockets can extend...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

Full JSON Raw Segments