Station and Bus

AtCoder

IDabc158_a

Time2000ms

Memory256MB

Difficulty—

In AtCoder City, there are three stations numbered $1$, $2$, and $3$. Each of these stations is operated by one of the two railway companies, A and B. A string $S$ of length $3$ represents which company operates each station. If $S_i$ is `A`, Company A operates Station $i$; if $S_i$ is `B`, Company B operates Station $i$. To improve the transportation condition, for each pair of a station operated by Company A and one operated by Company B, there will be a bus service connecting them. Determine if there is a pair of stations that will be connected by a bus service. ## Constraints * Each character of $S$ is `A` or `B`. * $|S| = 3$ ## Input Input is given from Standard Input in the following format: $S$ [samples]

Samples

Input #1

ABA

Output #1

Yes

Company A operates Station $1$ and $3$, while Company B operates Station $2$.
There will be a bus service between Station $1$ and $2$, and between Station $2$ and $3$, so print `Yes`.

Input #2

BBA

Output #2

Yes

Company B operates Station $1$ and $2$, while Company A operates Station $3$.
There will be a bus service between Station $1$ and $3$, and between Station $2$ and $3$, so print `Yes`.

Input #3

BBB

Output #3

No

Company B operates all the stations. Thus, there will be no bus service, so print `No`.

API Response (JSON)

{
  "problem": {
    "name": "Station and Bus",
    "description": {
      "content": "In AtCoder City, there are three stations numbered $1$, $2$, and $3$. Each of these stations is operated by one of the two railway companies, A and B. A string $S$ of length $3$ represents which compa",
      "description_type": "Markdown"
    },
    "platform": "AtCoder",
    "limit": {
      "time_limit": 2000,
      "memory_limit": 262144
    },
    "difficulty": "None",
    "is_remote": true,
    "is_sync": true,
    "sync_url": null,
    "sign": "abc158_a"
  },
  "statements": [
    {
      "statement_type": "Markdown",
      "content": "In AtCoder City, there are three stations numbered $1$, $2$, and $3$.\nEach of these stations is operated by one of the two railway companies, A and B. A string $S$ of length $3$ represents which compa...",
      "is_translate": false,
      "language": "English"
    }
  ]
}

Full JSON Raw Segments