Day 18 of June LeetCode Challenge

1 min readJun 18, 2020

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Given an array of citations sorted in ascending order (each citation is a non-negative integer) of a researcher, write a function to compute the researcher’s h-index.

According to the definition of h-index on Wikipedia: “A scientist has index h if h of his/her N papers have at least h citations each, and the other N − h papers have no more than h citations each.”

Example:

`Input: citations = [0,1,3,5,6]Output: 3 Explanation: [0,1,3,5,6] means the researcher has 5 papers in total and each of them had              received 0, 1, 3, 5, 6 citations respectively.              Since the researcher has 3 papers with at least 3 citations each and the remaining              two with no more than 3 citations each, her h-index is 3.`

Note:

If there are several possible values for h, the maximum one is taken as the h-index.

• This is a follow up problem to H-Index, where `citations` is now guaranteed to be sorted in ascending order.