Help me in solving LOTTERYTICK problem

help
,
1

My issue

explain me the problem and it’s solution

My code

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

class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc = new Scanner (System.in);
		int t = sc.nextInt();
		while(t-->0){
		    int n = sc.nextInt();
		    int[] a = new int[n];
		    for(int i=0;i<n;i++){
		        a[i]=sc.nextInt();
		    }
		    
		}

	}
}

Problem Link: Lottery Tickets Practice Coding Problem