LC-0275 Medium LeetCode

275. H-Index II

Read the full problem statement on LeetCode.

Difficulty: medium Acceptance: 39% Topics: Array, Binary Search

Reading material

Arrays & Hashing 12 min Binary Search 12 min

Reference solution (spoiler · python)

# Time:  O(logn)
# Space: O(1)

class Solution(object):
    def hIndex(self, citations):
        """
        :type citations: List[int]
        :rtype: int
        """
        n = len(citations)
        left, right = 0, n - 1
        while left <= right:
            mid = (left + right) / 2
            if citations[mid] >= n - mid:
                right = mid - 1
            else:
                left = mid + 1
        return n - left

Solution from kamyu104/LeetCode-Solutions · MIT