What is wrong in this , its working on giving input but on submitting only one test passes , i tried for many inputs , it worked well

#1

import java.util.*;
public class Main {
public static void main(String args[]) {

		int [] primeArray = new int [100];
    int check=0,c=1;
	for(int j=2 ; j<=500 ; j++)
	{
		check=0;
		for(int k=2 ; k<j ; k++)
		{
			if(j%k==0)
			{
				check=0;
				break;
			}
			check=1;
		}

		if(check==1)
		{
			primeArray[c]=j;
			c++;
		}
	}
		


Scanner sc= new Scanner(System.in);
int N=sc.nextInt();
for(int i=1 ; i<= N ; i++)
{
	int a=sc.nextInt();
	int b=sc.nextInt();
	int ans,start=0,end=0;
	if(a<=0) a=1;
	for(int l=0 ; l<primeArray.length ; l++)
	{
		if(a>primeArray[l])
		{
			start=l+1;
		}
		if(b<primeArray[l])
		{
			end=l;
			break;
		}
	}
	
	if(a<3)
	{
		System.out.println(end-start+1);
	}
	else
	{
		System.out.println(end-start);
	}			
}

}

}

#2

Use sieve to solve the problem , your code doesn’t fit in the required time complexity

#3

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