/* 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 Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
double a = 2d;
System.out.println(a);

double b = 2.6d ;
System.out.println(b);

for (int i = 0; i < 6 ; i ++)
{
    a+= 0.1;
}

System.out.println (Math.abs(a-b)) ;
}
}