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+import java.util.*;%0A%0Apublic class Memory%0A%7B%0A    public Memory ()%0A    %7B%0A        _theMemory = new HashMap%3CLong, Long%3E();%0A    %7D%0A%0A    public void addNumber (long numb)%0A    %7B%0A%0A    %7D%0A%0A    public long numberPresent (long numb)%0A    %7B%0A        return -1;%0A    %7D%0A%0A    private HashMap%3CLong, Long%3E _theMemory;%0A%7D

Update Memory.java