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, nfnum = 0, nfsum = 0;
        while (sc.hasNextInt()) {
            int n = sc.nextInt();
            if (n < 0) {
                fnum++;
            } else {
                nfnum++;
                nfsum += n;
            }
        }
        System.out.println(fnum);
        if (nfnum == 0) System.out.print("0.0");
        else System.out.printf("%.1f\n", (double) nfsum / nfnum);
    }
}