L1-056 猜数字 (20 分)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Set;

public class miatr {
public static void main(String[]args) throws IOException {
    BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(System.in));
    int num=Integer.parseInt(bufferedReader.readLine());
String string[]=new String[num];
    int sum=0;
    int aver=0;
HashMap<Integer,String> hashMap=new HashMap<>();
    for (int i = 0; i < num; i++) {
            string[i]=bufferedReader.readLine();
String spring[]=string[i].split("");
hashMap.put(Integer.parseInt(spring[1]),spring[0]);
sum+=Integer.parseInt(spring[1]);
}
         aver=sum/(2*num);
Set<Integer> x =hashMap.keySet();
ArrayList<Integer> x1=new ArrayList<>(x);
        float min=100;
        int num2=0;
    for (int i = 0; i <x1.size() ; i++) {
                    if(Math.abs(x1.get(i)-aver)<min){
                            min=Math.abs(x1.get(i)-aver);
num2=x1.get(i);
}
    }
    System.out.println(aver+" "+hashMap.get(num2));
}
}
我是菜鸟，大佬们别喷我。

L1-056 猜数字 (20 分)