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Grokking the Coding Interview Patterns in Go

Solution: H-Index

Explore an efficient method to calculate the h-index of a researcher by using counting sort instead of direct sorting. This lesson teaches you to build and use a frequency array to count citations and identify the h-index, optimizing time and space complexity for coding interviews.

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Statement

You are given an array of integers citations, where each element citations[i] represents the number of citations received for the ithi^{th} publication of a researcher.

Your task is to find the researcher’s h-index and return the value of hh.

Note: The h-index is defined as the highest number hh such that the given researcher has published at least hh papers, each of which has been cited at least hh times.

Constraints:

  • n==n == citations.length

  • ...