Given an array of integers citations where citations[i] is the number of citations a researcher received for their i^th 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:
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, their h-index is 3.Example 2:
Input: citations = [1,3,1]
Output: 1Constraints:
n == citations.length1 <= n <= 50000 <= citations[i] <= 1000func hIndex(citations []int) int { sort.Ints(citations) // fmt.Println(citations) for i, count := range citations { left := len(citations) - i // fmt.Println("article", i, "has", count, "citations") // fmt.Println(" ", i, "articles with <", count, "cit") // fmt.Println(" ", left, "articles with at least", count, "cit") if left <= count { // result = max(result, left) return left } } return 0 }