笨法，排序输出哈哈

import java.util.*;
public class Solution {
    public ArrayList<Integer> GetLeastNumbers_Solution(int [] input, int k) {
        ArrayList<Integer> ans = new ArrayList<>();
        if(k>input.length){
            return ans;
        }
        Arrays.sort(input);
        for(int i=0;i<k;i++){
            ans.add(input[i]);
        }
        return ans;
    }
}