H-index

Problem Statement

H-index Problem Description Given an array of citations A (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: "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." Note: If there are several possible values for h , the maximum one is taken as the h-index. Input Format: First and only argument of input contains an integer array A of size N Output Format: return a single integer denoting h-index. Examples Example 1: Input: A = [3, 0, 6, 1, 5] Output: 3 Explanation: [3,0,6,1,5] means the researcher has 5 papers in total and each of them had received 3, 0, 6, 1, 5 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. Example 2: Input: A = [20, 10, 5] Output: 3 Constraints 1 0