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.hasNextInt()) { // 注意 while 处理多个 case int len = in.nextInt(); double sum = 0; int p_count = 0; int n_count = 0; for (int i = 0; i < len; i++) { int num = in.nextInt(); if (num > 0) { sum += num; p_count++; } if (num < 0) { n_count++; } } if (p_count == 0) { System.out.println(n_count + " 0.0"); } else { System.out.printf("%d %.1f",n_count,sum / p_count); } } } }