AcCepted

AtCoder

IDabc104_b

Time2000ms

Memory256MB

Difficulty—

You are given a string $S$. Each character of $S$ is uppercase or lowercase English letter. Determine if $S$ satisfies all of the following conditions: * The initial character of $S$ is an uppercase `A`. * There is exactly one occurrence of `C` between the third character from the beginning and the second to last character (inclusive). * All letters except the `A` and `C` mentioned above are lowercase. ## Constraints * $4 ≤ |S| ≤ 10$ ($|S|$ is the length of the string $S$.) * Each character of $S$ is uppercase or lowercase English letter. ## Input Input is given from Standard Input in the following format: $S$ [samples]

Samples

Input #1

AtCoder

Output #1

AC

The first letter is `A`, the third letter is `C` and the remaining letters are all lowercase, so all the conditions are satisfied.

Input #2

ACoder

Output #2

WA

The second letter should not be `C`.

Input #3

AcycliC

Output #3

WA

The last letter should not be `C`, either.

Input #4

AtCoCo

Output #4

WA

There should not be two or more occurrences of `C`.

Input #5

Atcoder

Output #5

WA

The number of `C` should not be zero, either.

API Response (JSON)

{
  "problem": {
    "name": "AcCepted",
    "description": {
      "content": "You are given a string $S$. Each character of $S$ is uppercase or lowercase English letter. Determine if $S$ satisfies all of the following conditions: *   The initial character of $S$ is an uppercas",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc104_b"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "You are given a string $S$. Each character of $S$ is uppercase or lowercase English letter. Determine if $S$ satisfies all of the following conditions:\n\n*   The initial character of $S$ is an uppercas...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

Full JSON Raw Segments