题解 | #记负均正II#

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.stream.IntStream;

/**
 * @author hll[yellowdradra@foxmail.com]
 * @since 2023-04-01 12:26
 **/
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        List<Integer> list = new ArrayList<>();
        while (in.hasNextInt()) {
            list.add(in.nextInt());
        }
        System.out.printf("%d\n", list.stream().mapToInt(Integer::valueOf).filter(x -> x < 0).count());
        System.out.printf("%.1f\n", list.stream().mapToInt(Integer::valueOf).filter(x -> x >= 0).average().orElse(0));
    }
}