import java.util.ArrayList;

import java.util.Arrays;

public class Solution {

    public ArrayList<Integer> GetLeastNumbers_Solution(int[] input, int k) {

        ArrayList<Integer> arrayList = new ArrayList<Integer>();

        if (input == null || input.length == 0 || k > input.length) {

            return null;

        } else {

            //排序

            Arrays.sort(input);

            //找出前k个数

            for (int i = 0; i < k; i++) {

                arrayList.add(input[i]);

            }

            //返回结果

            return arrayList;

        }

    }

}