D-11.md

🔮 Question - H Index

Given an array of citations (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 = [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.
Note: If there are several possible values for h, the maximum one is taken as the h-index.

🐉 Solution

class Solution {
    public int hIndex(int[] citations) {
        Arrays.sort(citations);
        int i,count,res=0;
        for(i=citations.length-1;i>=0;i--){
            count=citations.length-i;
            if(citations[i]>=count){
          res=count;
            }
            else{
                break;
            }
        }
        return res;
    }
}