/* package whatever; // 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 Student{
	public int id;
 
}
class Ideone
{
	public static void print(Student s){
		s.id = 20;
		System.out.println(s.id);
	}
	public static void main (String[] args) throws java.lang.Exception
	{
		Student s = new Student();
		s.id = 10;
		System.out.println(s.id);
		print(s);
		System.out.println(s.id);
	}
}

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