import java.util.*;

public class MyArrayList<E> extends ArrayList<E>{
    
    public boolean containsExactly(Object object) {
	for(Object obj : this) {
	    if(((Operator) obj).equal100(((Operator)object)))
		return true;
	}
	return false;
    }

    public boolean containsAnother(Object object) {
	for(Object obj : this) {
	    if(((Operator) obj).equals((Operator) object) && 
	       (!((Operator) obj).equal100(((Operator)object))))
		return true;
	}
	return false;
    }

    public boolean removeExactly(Object object) {
	int pos = -1;
	boolean found = false;
	
	for(int i = 0; i < this.size(); i++) {	    
	    Operator op = ((Operator)this.get(i));
	    if(op.equal100(((Operator)object))) {
		pos = i;
		i=this.size();
		found = true;
	    }
	}
	if(found) {
	    if(CompileTimeCondition.DEBUG)
	    System.out.println("reomving... "+((Operator)object));
	    this.remove(pos);
	}
	return found;
    }
}