题解 | #记负均正II#注意正数为0的情况，格式化输出"%.1f\n"

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        int temp = 0;
        int countN = 0;
        int countP = 0;
        double sum = 0.0;
        while (in.hasNextInt()) { // 注意 while 处理多个 case
            temp = in.nextInt(); 
            if(temp<0){
                countN++;
            }else if(temp>0){
                countP++;
                sum += temp;
            }
        }
        System.out.println(countN);
        if(countP==0){
            System.out.printf("0.0");
        }else{
            System.out.printf("%.1f\n",sum/countP);
        }
    }
}