import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.locks.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
import java.math.*;
class main {

static interface IManagedObjectCollector_v {
  // notify collector that there is an object in a location
  public void noteObject(VAddr start, int size);
  
  // same plus callback after compaction
  public void noteObject(VAddr start, int size, IVF1<VAddr> updateAddress);
  
  // notify collector that there is a pointer in a location
  public void notePointer(VAddr addr, IVF1<VAddr> updateAddress);
  
  default public void notePointer(VAddr addr) { notePointer(addr, null); }
  
  public void noteRootPointer(VAddr addr);
  
  // notify collector that there is a pointer array in a location
  public void notePointerArray(VAddr start);
  
  // notify collector that there is an int array in a location
  public void noteIntArray(VAddr start);
  
  void noteString(VAddr addr, IVF1<VAddr> updateAddress);
  //default void noteString(VAddr addr) { noteString(addr, null); }
  
  // call after collectAndCompact to get new location of objects
  // XX - I think we don't need this. Object moves are done through
  // callbacks (updateAddress) and are incremental and concurrent now
  VAddr getNewLocation(VAddr addr);
}
static interface IVF1<A> {
  void get(A a);
}static interface VAddr {
  
  
  
  int get();
  int get(int ofs);
  void set(int val);
  void set(int ofs, int val);
  
  VAddr plus(int ofs);
}

static BigInteger plus(BigInteger a, BigInteger b) {
  return a.add(b);
}

static BigInteger plus(BigInteger a, long b) {
  return a.add(bigint(b));
}



static BigInteger bigint(String s) {
  return new BigInteger(s);
}

static BigInteger bigint(long l) {
  return BigInteger.valueOf(l);
}


}