题解 | #记负均正#

import java.util.*;

public class Main{
    public static void main(String [] args){
        Scanner sc = new Scanner(System.in);
        int num = 0;
        int z = 0;
        int sum=0;
        int index = sc.nextInt();
        for(int i= 0 ; i< index;i++){
            int x = sc.nextInt();
            if(x ==0){
                continue;
            }else if(x < 0){
                num++;
            }else{
                sum+=x;
                z++;
            }
        }
        System.out.print(num+" " + (sum==0.0?0:Math.round(sum*10.0/z)/10.0));
    }
}