题解HJ97 | #记负均正#

import java.util.Scanner;
import java.util.*;

// 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);

        Integer.valueOf(in.nextLine());

        List<String> list = Arrays.asList(in.nextLine().split(" "));

        //负数个数
        Integer fuCount = 0;
        //正整数个数
        Integer zhCount = 0;
        Double zhSum = Double.valueOf(0);

        for (String s : list) {
            if (Integer.valueOf(s) < 0) {
                fuCount++;
            } else if (Integer.valueOf(s) > 0) {
                zhSum += Integer.valueOf(s);

                zhCount++;
            }
        }

        System.out.print(fuCount + " " + (zhCount != 0 ? String.format("%.1f", zhSum / zhCount) : Double.valueOf(0)));
    }
}