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Solution: Least Number of Unique Integers after K Removals

Explore how to reduce unique integers in an array by exactly removing k elements. Understand the strategy of targeting the least frequent numbers first with a min heap to achieve minimal distinct counts after removals.

Statement

You are given an integer array, arr, and an integer, k. Your task is to remove exactly k elements from the array so that the number of distinct integers remaining in the array is minimized. Determine the minimum possible count of unique integers after the removals.

Constraints:

  • 11 \leq arr.length 103\leq 10^3

  • 11 \leq arr[i] 105\leq 10^5 ...