/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.math.*;
 
/* 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
	{
		// your code goes here
		BigDecimal b1 = new BigDecimal(1);
		BigDecimal b2 = new BigDecimal(2);
		BigDecimal b3 = new BigDecimal(3);
 
		System.out.println(b1.add((b2).divide(b3,3,BigDecimal.ROUND_UP)));
	}
}

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