Given an integer array `nums` and an integer `k`, return *the `k` most frequent elements*. You may return the answer in **any order**.
Examples
Example 1
Input:
nums = [1,1,1,2,2,3], k = 2Output:
[1,2]Example 2
Input:
nums = [1], k = 1Output:
[1]Constraints
- •
1 <= nums.length <= 10^5 - •
-10^4 <= nums[i] <= 10^4 - •
k is in the range [1, the number of unique elements in the array]. - •
It is guaranteed that the answer is unique.
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