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Home Code Solutions

H-Index II – LeetCode Solution

H-Index II - LeetCode Solution Java , Python 3, Python 2 , C , C++, Best and Optimal Solutions , All you need.

BhautikBhalala by BhautikBhalala
September 6, 2022
Reading Time: 2 mins read
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Leetcode All Problems Solutions

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Table of Contents

  • H-Index II – LeetCode Solution Java , Python 3, Python 2 , C , C++, Best and Optimal Solutions , All you need.
  • C++ H-Index II LeetCode Solution
  • Java H-Index II LeetCode Solution
  • Python 3 H-Index II LeetCode Solution
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H-Index II – LeetCode Solution Java , Python 3, Python 2 , C , C++, Best and Optimal Solutions , All you need.

Given an array of integers citations where citations[i] is the number of citations a researcher received for their ith 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
  • 1 <= n <= 105
  • 0 <= citations[i] <= 1000
  • citations is sorted in ascending order.

C++ H-Index II LeetCode Solution


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int hIndex(vector<int>& c) {
        int n = c.size();
        if(!n) return 0;
        for(int i=0;i<n;i++){
             if(c[i] >= n-i) return n-i;   // The first element whose value is more than the length of remaining array. 
			 //So we return the remaining length which is the answer.
			 // eg [0,1,3,4,6]  c[2] = 3 >2(length of remaing array) so n-i = length of remaining array + that element
        }
        return 0;
    }

Java H-Index II LeetCode Solution


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public int hIndex(int[] citations) {
	int len = citations.length;
	int lo = 0, hi = len - 1;
	while (lo <= hi) {
		int med = (hi + lo) / 2;
		if (citations[med] == len - med) {
			return len - med;
		} else if (citations[med] < len - med) {
			lo = med + 1;
		} else { 
			//(citations[med] > len-med), med qualified as a hIndex,
		    // but we have to continue to search for a higher one.
			hi = med - 1;
		}
	}
	return len - lo;
}

 



Python 3 H-Index II LeetCode Solution


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class Solution:
    def hIndex(self, citations):
        if not citations: return 0
        n = len(citations)
        beg, end = 0, n - 1
        while beg <= end:
            mid = (beg + end)//2
            if mid + citations[mid] >= n:
                end = mid - 1
            else:
                beg = mid + 1                
        return n - beg



 

Array-1180
String-562
Hash Table-412
Dynamic Programming-390
Math-368
Sorting-264
Greedy-257
Depth-First Search-256
Database-215
Breadth-First Search-200
Tree-195
Binary Search-191
Matrix-176
Binary Tree-160
Two Pointers-151
Bit Manipulation-140
Stack-133
Heap (Priority Queue)-117
Design-116
Graph-108
Simulation-103
Prefix Sum-96
Backtracking-92
Counting-86
Sliding Window-73
Linked List-69
Union Find-66
Ordered Set-48
Monotonic Stack-47
Recursion-43
Trie-41
Binary Search Tree-40
Divide and Conquer-40
Enumeration-39
Bitmask-37
Queue-33
Memoization-32
Topological Sort-31
Geometry-30
Segment Tree-27
Game Theory-24
Hash Function-24
Binary Indexed Tree-21
Interactive-18
Data Stream-17
String Matching-17
Rolling Hash-17
Shortest Path-16
Number Theory-16
Combinatorics-15
Randomized-12
Monotonic Queue-9
Iterator-9
Merge Sort-9
Concurrency-9
Doubly-Linked List-8
Brainteaser-8
Probability and Statistics-7
Quickselect-7
Bucket Sort-6
Suffix Array-6
Minimum Spanning Tree-5
Counting Sort-5
Shell-4
Line Sweep-4
Reservoir Sampling-4
Eulerian Circuit-3
Radix Sort-3
Strongly Connected Componen-t2
Rejection Sampling-2
Biconnected Component-1

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Leetcode All Problems SolutionsH-Index – LeetCode Solution Leetcode All Problems SolutionsSudoku Solver – LeetCode Solution Leetcode All Problems SolutionsSearch a 2D Matrix – LeetCode Solution Leetcode All Problems SolutionsSubsets II – LeetCode Solution Leetcode All Problems SolutionsSurrounded Regions – LeetCode Solution Leetcode All Problems SolutionsContains Duplicate II – LeetCode Solution
Tags: Cc++14full solutionGoH-Index IIjavajava 15java 7java 8java8javascriptkotlinLeetCodeLeetCodeSolutionpypy 3Python 2python 3rubyrustSolution
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