class IntObj
{
 private int val;

 public IntObj(int n)
 {
  val=n;
 }

 public void add(int m)
 {
  val=val+m;
 }

 public void sub(int m)
 {
  val=val-m;
 }

 public void mult(int m)
 {
  val=val*m;
 }

 public int value()
 {
  return val;
 }

 public void add(IntObj a)
 {
  val=val+a.val;
 }

 public IntObj cadd(IntObj a)
 {
  return new IntObj(val+a.val);
 }

 public static IntObj add(IntObj a, IntObj b)
 {
  int c = a.val+b.val;
  return new IntObj(c);
 }

}