【java】274. H-Index

问题原文https://leetcode.com/problems/h-index/description/

public int hIndex(int[] citations) {
        Arrays.sort(citations);
        int len = citations.length;
        int res = 0;
        for(int i = len-1;i>=0;i--) {
        	if(citations[i]>=len-i) res = len-i;
        	else break;
        }
        return res;
    }