题解 | 记负均正

#牛客创作赏金赛# #刷题我是认真的#

解题比较简单，就是累加即可，注意一下格式即可

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 n = Integer.parseInt(in.nextLine());
        String[] arr = in.nextLine().split(" ");
        int negNum = 0;
        int pNum = 0;
        int sum = 0;
        for (int i = 0; i < arr.length; i++) {
            int num = Integer.parseInt(arr[i]);
            if (num < 0) {
                negNum++;
            } else if (num > 0) {
                pNum++;
                sum += num;
            }
        }
        System.out.print(negNum + " ");
        if (pNum > 0) {
            System.out.print(String.format("%.1f", (float)sum / pNum));
        } else {
            System.out.print("0.0");
        }
    }
}