题解HJ105 | #记负均正II#

import java.util.ArrayList;
import java.util.List;
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);

        int fuCount = 0;
        int zhCount = 0;
        Double sum = Double.valueOf(0);

        while (in.hasNextLine()) {
            Integer x = Integer.valueOf(in.nextLine());
            if (x >= 0) {
                sum += x;
                zhCount++;
            } else {
                fuCount++;
            }
        }

        System.out.print(fuCount + "\n" + (zhCount > 0 ? String.format("%.1f",
                                           sum / zhCount) : Double.valueOf(0)));
    }
}