Category B 1012 digital pta java

Sample Input 1:

13 1 2 3 4 5 6 7 8 9 10 20 16 18

Output Sample 1:

30 11 2 9.7 9

Sample Input 2:

8 1 2 4 5 6 7 9 16

Output Sample 2:

N 11 2 N 9

//1012
import java.util.Scanner;
public class Main{
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        int n=in.nextInt();
        int n1=0,n2=0,n3=0,n5=0;
        double n4=0.0,sum4=0.0;
        int i2=0,i4=0;
        int[] num=new int[n];
        for(int i=0;i<n;i++){
            num[i]=in.nextInt();
            if(num[i]%5==0&&num[i]%2==0){
                n1+=num[i];
                continue;
            }
            if(num[i]%5==1){
                n2+=Math.pow(-1,i2)*num[i];
                i2++;
                continue;
            }
            if(num[i]%5==2){
                n3++;
                continue;
            }
            if(num[i]%5==3){
                sum4+=num[i];
                i4++;//记得求平均
                continue;
            }
            if(num[i]%5==4){
                if(num[i]>n5){
                    n5=num[i];
                }
                continue;
            }
        }
        n4=sum4/i4;
        if(n1!=0){
            System.out.print(n1+" ");
        }
        else{
            System.out.print("N ");
        }
        if(i2!=0){
            System.out.print(n2+" ");
        }
        else{
            System.out.print("N ");
        }
        if(n3!=0){
            System.out.print(n3+" ");
        }
        else{
            System.out.print("N ");
        }
        if(sum4!=0){
            System.out.printf("%.1f ",n4);
        }
        else{
            System.out.print("N ");
        }
        if(n5!=0){
            System.out.print(n5);
        }
        else{
            System.out.print("N");
        }
    }
}