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Grokking the Coding Interview Patterns in C#

Introduction to Top K Elements

Explore how to use the top k elements pattern to efficiently find largest or smallest subsets in unsorted data. Understand how heaps optimize this process, reducing sorting time and helping solve common coding interview problems involving frequency and size constraints.

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About the pattern

The top k elements pattern is an important technique in coding that helps us efficiently find a specific number of elements, known as kk, from a set of data. This is particularly useful when we’re tasked with identifying the largest, smallest, or most/least frequent elements within an unsorted collection.

To solve tasks like these, one might think to sort the entire collection first, which takes O(nlog⁡(n))O(n \log(n)) time, and then select the top k elements, taking additional ...