Counting Sort

ProblemGiven an array of integers citations where citations[i] is the number of citations a researcher received for their ith paper, return the researcher’s h-index. According to the definition of h-index on Wikipedia: The h-index is defined as the maximum value of h such that the given researcher has published at least h papers that have each been cited at least h times. Example 1: 12345Input: citations = [3,0,6,1,5]Output: 3Explanation: [3,0,6,1,5] means the researcher has 5 papers in total an ...