题解 | #记负均正#
记负均正
https://www.nowcoder.com/practice/6abde6ffcc354ea1a8333836bd6876b8
import java.util.*; import java.text.DecimalFormat; public class Main { public static void main(String[] args) { Scanner sc=new Scanner(System.in); int n= sc.nextInt(); int[] arr=new int[n]; int fcount=0; Double zcount=0.0,zsum=0.0; Double ave=0.0; for (int i=0;i<n;i++){ arr[i]=sc.nextInt(); if (arr[i]>0){ zsum=zsum+arr[i]; zcount++; } else if (arr[i]<0) { fcount++; } } ave=zsum/zcount; if (zcount==0.0){ ave=0.0; } DecimalFormat df=new DecimalFormat("0.0"); String s = df.format(ave); System.out.println(fcount+" "+s); } }