leetcode274. H-Index
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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.”
For example, given citations = [3, 0, 6, 1, 5], which 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, his h-index is 3.
Note: If there are several possible values for h, the maximum one is taken as the h-index.
思路
原数组排序,遍历,当有n篇index>=index,则为H-index=n
喜欢有序的世界~~
python代码
class Solution(object): def hIndex(self,citations): citations.sort(reverse=True) flag=0 for i in range(len(citations)): if citations[i]>=i+1: flag=flag+1 return flag
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