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Given an integer array nums and an integer k, return the k most frequent elements. You may return the answer in any order.

Example 1:

makefileCopy codeInput: nums = [1,1,1,2,2,3], k = 2
Output: [1,2]

Example 2:

makefileCopy codeInput: nums = [1], k = 1
Output: [1]

Constraints:

• 1≤nums.length≤1051≤nums.length≤105
• −104≤nums[i]≤104−104≤nums[i]≤104
• 𝑘k 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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