LRNDSA01/MULTHREE/DSA LEARNING SERIES

/* package codechef; // don’t place package name! */

here is the quuestion link
https://www.codechef.com/LRNDSA01/submit/MULTHREE

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
	    Scanner sc = new Scanner(System.in);
        int t = sc.nextInt();
       sc.nextLine();
       for(int i=0;i<t;i++){
           String []arr=sc.nextLine().split(" ");
           long k = Long.parseLong(arr[0]);
           int sum= Integer.parseInt(arr[1])+Integer.parseInt(arr[2]);
           int output;
           
           if(k==2)
           output=sum;
           else if(k==3)
           output=sum+sum%10;
           else
           {
             int a= (2*sum)%10; 
             int b= (4*sum)%10;  
             int c= (8*sum)%10;  
             int d= (6*sum)%10; 
             
             output= sum+sum%10+(int)((k-3)/4)*(a+b+c+d);
             k=k-3;
             k=k%4;
             
             if(k==1)
             output=output+a;
             if(k==2)
             output=output+a+b;
             if(k==3)
             output=output+a+b+c;
           }
           
           if(output%3==0)
            System.out.println("YES");
           else
           System.out.println("NO");
       }

	}
}




I am getting wrong answer but don;t know why??

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