1. Introduction

``Data Structures and Algorithms'' is one of the classic, core topics of Computer Science. Data structures and algorithms are central to the development of good quality computer programs. Their role is brought out clearly in the following diagram (Aho, Hopcroft, and Ullman (1983)).
 
 
 

Mathematcial          Model	$\Longrightarrow$	Abstract Dat     Type	$\Longrightarrow$	Data Structures
Informal       Algorithm	$\Longrightarrow$	Pseudo Language  Program	$\Longrightarrow$	Program in C or Java or  ......

                                                                                                                                                         The Problem Solving Process in Computer Science