CodingMediumcod-g570

Subject SortingLevel Mid–Senior~18 minCommon in Algorithms & data structures interviewsIndustries Software development

Question

A researcher's h-index is the largest h such that they have at least h papers each cited at least h times. Given an array citations where citations[i] is the citation count of the i-th paper, return the h-index. Array length up to 5000; citation counts are non-negative.

Implement

h_index(citations: list[int]) → int

Examples

in[[3,0,6,1,5]]out3

What a strong answer looks like

State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.

Learn the concepts

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.