# LeetCode – H-Index (Java)

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. 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.

**Java Solution**

public int hIndex(int[] citations) { Arrays.sort(citations); int result = 0; for(int i=0; i<citations.length; i++){ int smaller = Math.min(citations[i], citations.length-i); result = Math.max(result, smaller); } return result; } |

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