Grok 4 Fast Reasoning vs o3

# Challenge \#9: 🦌 The reno robot aspirator 





HARD

The elves have built a **robot vacuum reindeer 🦌** (`@`) to tidy up the workshop a bit before Christmas.

The reindeer moves on a board to **pick things up off the floor** (`*`) and must **avoid obstacles** (`#`).

You will receive two parameters:

- `board`: a `string` that represents the board.
- `moves`: a `string` with the movements: `'L'` (left), `'R'` (right), `'U'` (up), `'D'` (down).

**Movement rules:**

- If the reindeer **picks something up off the floor** (`*`) during the moves → return `'success'`.
- If the reindeer **goes off the board** or **crashes into an obstacle** (`#`) → return `'crash'`.
- If the reindeer **neither picks anything up nor crashes** → return `'fail'`.

Keep in mind that if the reindeer **picks something up off the floor**, it is already `'success'`, regardless of whether in later moves it crashes into an obstacle or goes off the board.

**Important:** Keep in mind that in the `board` the first and last lines are blank and must be discarded.

**Example:**

```javascript
const board = `
.....
.*#.*
.@...
.....
`

moveReno(board, 'D')
// ➞ 'fail' -> it moves but doesn't pick anything up

moveReno(board, 'U')
// ➞ 'success' -> it picks something up (*) right above

moveReno(board, 'RU')
// ➞ 'crash' -> it crashes into an obstacle (#)

moveReno(board, 'RRRUU')
// ➞ 'success' -> it picks something up (*)

moveReno(board, 'DD')
// ➞ 'crash' -> it crashes into the bottom of the board

moveReno(board, 'UUU')
// ➞ 'success' -> it picks something up off the floor (*) and then crashes at the top

moveReno(board, 'RR')
// ➞ 'fail' -> it moves but doesn't pick anything up
```