Help me in solving HOTEL problem

help
,
1

My issue

find error in this 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();
		for(int i = 0; i < t; i++){
		    int n = sc.nextInt();
		    int arrival[] = new int[n];
		    int departure[] = new int[n];
		    
		    for(int j = 0; j < n; j++){
		        arrival[j] = sc.nextInt(); 
		    }
		    for(int k = 0; k < n; k++){
		        departure[k] = sc.nextInt();
		    }
		    
		    Arrays.sort(arrival);
		    Arrays.sort(departure);
		    int cnt = n; 
		    for(int l = 0; l < n; l++){
		        if(departure[l] <= arrival[l]){
		            cnt--;
		        }
		    }
		    System.out.println(cnt);
		    
		}

	}
}

Problem Link: Hotel Bytelandia Practice Coding Problem