题解 | 记负均正II

import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        int fnum = 0, nfsum = 0, nfnum = 0;
        while (sc.hasNextInt()) {
            int t = sc.nextInt();
            if (t < 0) {
                fnum ++;
            } else {
                nfsum += t;
                nfnum++;
            }
        }
        System.out.println(fnum);
        if(nfnum==0) System.out.print(0.0);
        else System.out.print(String.format("%.1f",(double) nfsum/nfnum));
    }
}