题解 | #记负均正II#

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner in=new Scanner(System.in);
        int count_nag=0;
        int count_pos=0;
        double sum=0.0;
        while(in.hasNextDouble()){
            double a=in.nextDouble();
            if(a<0) count_nag++;
            else{
                sum+=a;
                count_pos++;
            }
        }
        System.out.println(count_nag);
        if(count_pos==0) System.out.println(0.0);
        else
            System.out.printf("%.1f\n",sum/count_pos);
    }
}