// Fizz Buzz — EASY
// Category: math
Given an integer `n`, return a string array `answer` (1-indexed) where:
- `answer[i] == "FizzBuzz"` if `i` is divisible by both 3 and 5.
- `answer[i] == "Fizz"` if `i` is divisible by 3.
- `answer[i] == "Buzz"` if `i` is divisible by 5.
- `answer[i] == i` (as a string) otherwise.
Example: n = 3
Output: ["1", "2", "Fizz"]