Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns

Solution: Least Number of Unique Integers after K Removals

Understand how to minimize the number of unique integers remaining in an array after removing exactly k elements. Explore using a frequency map and a min heap to iteratively remove the least frequent numbers, allowing you to efficiently solve problems involving array element removal and uniqueness reduction.

We'll cover the following...

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:

  • 1≤1 \leq arr.length ≤103\leq 10^3

  • 1≤1 \leq arr[i] ≤105\leq 10^5 ...