题解 | #记负均正II#

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 scanner = new Scanner(System.in);
        scanner.useDelimiter("\n");

        int count = 0;
        double[] sum = new double[2];
        while (scanner.hasNextDouble()) {
            double i = scanner.nextDouble();
            if (i>0) {
                sum[0] += i;
                sum[1]++;
            } else if (i<0){
                count++;
            }
            
        }
       System.out.println(count+"\n"+(sum[1]==0?"0.0":String.format("%.1f", sum[0]/sum[1])));
    }
}