题解 | #记负均正#

重点：保留一位小数使用String.format("%.1f",value).toString()

import java.util.*;
public class Main{
    public static void main(String [] args){
        getNumberAverage();
    }
    public static void getNumberAverage(){
        Scanner scan = new Scanner(System.in);
        while(scan.hasNext()){
            int len = scan.nextInt();
            int number = 0;
            int sum = 0;
            double sumNumber = 0.0;
            for(int i = 0; i < len; i++){
                int temp = scan.nextInt();
                if(temp < 0){
                    number ++;
                    continue;
                }
                if(temp > 0){
                    sum += temp;
                    sumNumber++;
                }

            }
            System.out.println(number + " " + String.format("%.1f",sum/sumNumber).toString());
        }
    }

}