-. t\ Whatstartedoff asanenrichmentassignmentfor a third graderhasdevelopedinto arich sourceof programmingassignments.Thelong integers,needed to determinewhetheranumbereventuallybecomesa palindromeundertheprocessof reversalandaddition, cribed,asanabstractdatatypeand implementedasaC+t class. Thereareintriguing openquestionswhich call for greatcreativity and efficiency in termsof datastructures.Evengraphics ’havebeenemployedto illuminate theproblem. The next stepis probablyparallelprocessing.