Thisisabookforthecomputationalist,whetheraworkingprogrammeroranyoneinterestedinmethodsofcomputation.Thefocusisonmaterialthatdoesnotusuallyappearintextbooksonalgorithms.Wherenecessarytheunderlyingideasareexplainedandthealgorithmsaregivenformally.Itisassumedthatthereaderisabletound