/* 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
{
 
    static final sun.misc.Unsafe unsafe;
 
    static
    {
        try
        {
            final java.lang.reflect.Field field = sun.misc.Unsafe.class.getDeclaredField("theUnsafe");
            field.setAccessible(true);
            unsafe = (sun.misc.Unsafe) field.get(null);
        } catch (final Throwable e)
        {
            throw new Error("Can't find unsafe instance.", e);
        }
    }
 
    public static void main(String[] args)
    {
        long memStart = unsafe.allocateMemory(4 * 3);
        long ptr1 = memStart + (4 * 1);
        long ptr2 = memStart + (4 * 2);
 
        System.out.println("Ptr1: " + Long.toHexString(ptr1) + ", Ptr2: " + Long.toHexString(ptr2) + ", Result: " + Long.toHexString(memStart));
        unsafe.putInt(ptr1, 5);
        unsafe.putInt(ptr2, 15);
 
        add(ptr1, ptr2, memStart);
        System.out.println(unsafe.getInt(memStart));
    }
 
    public static void add(long intA, long intB, long result)
    {
        unsafe.putInt(result, unsafe.getInt(intA) + unsafe.getInt(intB));
    }
}

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