题解 | #记负均正#
记负均正
https://www.nowcoder.com/practice/6abde6ffcc354ea1a8333836bd6876b8
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); // 注意 hasNext 和 hasNextLine 的区别 while (in.hasNext()) { int num = in.nextInt(); double ave = 0; int fushuNum = 0; int zero = 0; for (int i = 0; i < num; i++) { int a = in.nextInt(); if (a == 0) { zero++; continue; } else if (a > 0) { ave += a; } else { fushuNum++; } } if (num == zero) { ave = 0.0; } else { ave = ave / (num - fushuNum - zero); } System.out.print(fushuNum + " "); System.out.printf("%.1f", ave); } } }