题解 | #记负均正#

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner fzhinput = new Scanner(System.in);
        int num = fzhinput.nextInt();
        fzhinput.nextLine();
        int znum=0,fnum=0;
        float sum=0;
        for (int i = 0; i < num; i++) {
            int sz = fzhinput.nextInt();
            if(sz>0) {
                sum+=sz;
                znum++;
            }
            else if(sz<0){
                fnum++;
            }
        }
        String pj = String.format("%.1f",sum/znum);
        if(znum==0){
            pj="0.0";
        }
        System.out.println(fnum+" "+pj);
    }
}