Package g0201_0300.s0275_h_index_ii

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    275 - H-Index II.

    Medium

    Given an array of integers citations where citations[i] is the number of citations a researcher received for their <code>i<sup>th</sup></code> paper and citations is sorted in an ascending order , return compute the researcher's h \-index.

    According to the definition of h-index on Wikipedia: A scientist has an index h if h of their n papers have at least h citations each, and the other n − h papers have no more than h citations each.

    If there are several possible values for h, the maximum one is taken as the h \-index.

    You must write an algorithm that runs in logarithmic time.

    Example 1:

    Input: citations = 0,1,3,5,6

    Output: 3

    Explanation: 0,1,3,5,6 means the researcher has 5 papers in total and each of them had received 0, 1, 3, 5, 6 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 = 1,2,100

    Output: 2

    Constraints:

    • n == citations.length

    • <code>1 <= n <= 10<sup>5</sup></code>

    • 0 &lt;= citations[i] &lt;= 1000

    • citations is sorted in ascending order.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer hIndex(IntArray citations)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait