Rightmost

AtCoder

IDabc276_a

Time2000ms

Memory256MB

Difficulty—

You are given a string $S$ consisting of lowercase English letters. If `a` appears in $S$, print the last index at which it appears; otherwise, print $-1$. (The index starts at $1$.) ## Constraints * $S$ is a string of length between $1$ and $100$ (inclusive) consisting of lowercase English letters. ## Input The input is given from Standard Input in the following format: $S$ [samples]

Samples

Input #1

abcdaxayz

Output #1

7

`a` appears three times in $S$. The last occurrence is at index $7$, so you should print $7$.

Input #2

bcbbbz

Output #2

\-1

`a` does not appear in $S$, so you should print $-1$.

Input #3

aaaaa

Output #3

API Response (JSON)

{
  "problem": {
    "name": "Rightmost",
    "description": {
      "content": "You are given a string $S$ consisting of lowercase English letters.   If `a` appears in $S$, print the last index at which it appears; otherwise, print $-1$. (The index starts at $1$.)",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc276_a"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "You are given a string $S$ consisting of lowercase English letters.  \nIf `a` appears in $S$, print the last index at which it appears; otherwise, print $-1$. (The index starts at $1$.)\n\n## Constraints...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

Full JSON Raw Segments