Help me in solving PRACLIST problem

My issue

problem was not submited so pls fix it.

My code

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

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
	{
		// your code goes here
		Scanner sc=new Scanner(System.in);
		int X=sc.nextInt();
		int Y=sc.nextInt();
		System.out.println(X-Y);
	}
}

Problem Link: PRACLIST Problem - CodeChef