A Practical Introduction to Data Structures and Algorithm Analysis

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Sec. 6.2 The Parent Pointer Implementation 213AB C DEAB C D E F G HIJ0 1 2 3 4 5 6 7 8 9FGHIJ(a)0 3 5 25A C FJDAB C D E F G HIJ0 1 2 3 4 5 6 7 8 9B H GIE(b)0 0 5 3 5 25AFJAB C D E F G HIJ0 1 2 3 4 5 6 7 8 9BCGID(c)HE50 0 5 3 5 25FJA B C D E F G H IJ0 1 2 3 4 5 6 7 8 9AGIDBCEH(d)Figure 6.7 An example of equivalence processing. (a) Initial configuration forthe ten nodes of the graph in Figure 6.6. The nodes are placed into ten independentequivalence classes. (b) The result of processing five edges: (A, B), (C, H), (G, F),(D, E), and (I, F). (c) The result of processing two more edges: (H, A) and (E, G).(d) The result of processing edge (H, E).
214 Chap. 6 Non-Binary Treesusing the parent pointer array representation. Now, consider what happenswhen equivalence relationship (A, B) is processed. The root of the treecontaining A is A, and the root of the tree containing B is B. To make themequivalent, one of these two nodes is set to be the parent of the other. Inthis case it is irrelevant which points to which, so we arbitrarily select thefirst in alphabetical order to be the root. This is represented in the parentpointer array by setting the parent field of B (the node in array position 1of the array) to store a pointer to A. Equivalence pairs (C, H), (G, F), and(D, E) are processed in similar fashion. When processing the equivalencepair (I, F), because I and F are both their own roots, I is set to point to F.Note that this also makes G equivalent to I. The result of processing thesefive equivalences is shown in Figure 6.7(b).The parent pointer representation places no limit on the number of nodes thatcan share a parent. To make equivalence processing as efficient as possible, thedistance from each node to the root of its respective tree should be as small aspossible. Thus, we would like to keep the height of the trees small when mergingtwo equivalence classes together. Ideally, each tree would have all nodes pointingdirectly to the root. Achieving this goal all the time would require too much additionalprocessing to be worth the effort, so we must settle for getting as close aspossible.A low-cost approach to reducing the height is to be smart about how two treesare joined together. One simple technique, called the weighted union rule, joinsthe tree with fewer nodes to the tree with more nodes by making the smaller tree’sroot point to the root of the bigger tree. This will limit the total depth of the tree toO(log n), because the depth of nodes only in the smaller tree will now increase byone, and the depth of the deepest node in the combined tree can only be at most onedeeper than the deepest node before the trees were combined. The total numberof nodes in the combined tree is therefore at least twice the number in the smallersubtree. Thus, the depth of any node can be increased at most log n times when nequivalences are processed.Example 6.3 When processing equivalence pair (I, F) in Figure 6.7(b),F is the root of a tree with two nodes while I is the root of a tree with onlyone node. Thus, I is set to point to F rather than the other way around.Figure 6.7(c) shows the result of processing two more equivalence pairs:(H, A) and (E, G). For the first pair, the root for H is C while the rootfor A is itself. Both trees contain two nodes, so it is an arbitrary decision
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xviPrefacemake the examples as clea
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xviiiPrefaceOne of the most importa
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xxPrefaceOthers at Prentice Hall wh
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1Data Structures and AlgorithmsHow
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Sec. 1.1 A Philosophy of Data Struc
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Sec. 1.1 A Philosophy of Data Struc
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Sec. 1.2 Abstract Data Types and Da
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Sec. 1.2 Abstract Data Types and Da
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Sec. 1.3 Design Patterns 13Data Typ
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Sec. 1.3 Design Patterns 151.3.3 Co
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Sec. 1.4 Problems, Algorithms, and
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Sec. 1.5 Further Reading 194. It mu
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Sec. 1.6 Exercises 21If you want to
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Sec. 1.6 Exercises 231.12 Imagine t
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2Mathematical PreliminariesThis cha
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Sec. 2.1 Sets and Relations 27examp
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Sec. 2.2 Miscellaneous Notation 29x
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Sec. 2.3 Logarithms 31positive inte
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Sec. 2.4 Summations and Recurrences
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Sec. 2.4 Summations and Recurrences
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Sec. 2.5 Recursion 37factorial of n
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Sec. 2.6 Mathematical Proof Techniq
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Sec. 2.7 Estimating 47Example 2.17
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Sec. 2.8 Further Reading 49typical
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Sec. 2.9 Exercises 51(f) {〈2, 1
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Sec. 2.9 Exercises 532.17 Prove by
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Sec. 2.9 Exercises 552.38 When buyi
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3Algorithm AnalysisHow long will it
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Sec. 3.1 Introduction 59compiled wi
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Sec. 3.1 Introduction 61Example 3.3
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Sec. 3.2 Best, Worst, and Average C
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Sec. 3.3 A Faster Computer, or a Fa
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Sec. 3.4 Asymptotic Analysis 67comp
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Sec. 3.4 Asymptotic Analysis 69fast
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Sec. 3.4 Asymptotic Analysis 71Exam
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Sec. 3.4 Asymptotic Analysis 73Rule
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Sec. 3.5 Calculating the Running Ti
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Sec. 3.5 Calculating the Running Ti
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Sec. 3.6 Analyzing Problems 79binar
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Sec. 3.7 Common Misunderstandings 8
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Sec. 3.9 Space Bounds 83pixel. Assu
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Sec. 3.9 Space Bounds 85A classic e
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Sec. 3.10 Speeding Up Your Programs
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Sec. 3.11 Empirical Analysis 893.11
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Sec. 3.13 Exercises 913.3 Arrange t
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Sec. 3.13 Exercises 93(f) sum = 0;f
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Sec. 3.14 Projects 95a summation fo
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4Lists, Stacks, and QueuesIf your p
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Sec. 4.1 Lists 101The next step is
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Sec. 4.1 Lists 103mentations, asser
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Sec. 4.1 Lists 105/** Array-based l
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Sec. 4.1 Lists 107Insert 23:1312 20
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Sec. 4.1 Lists 109currtailheadFigur
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Sec. 4.1 Lists 111// Linked list im
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Sec. 4.1 Lists 113curr... 23 12 ...
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Sec. 4.1 Lists 115// Singly linked
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Sec. 4.1 Lists 117determined size.
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Sec. 4.1 Lists 119pointer to each e
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Sec. 4.1 Lists 121// Insert "it" at
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Sec. 4.1 Lists 123curr... 20curr23
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Sec. 4.2 Stacks 125/** Stack ADT */
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Sec. 4.2 Stacks 127// Linked stack
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Sec. 4.2 Stacks 129Currptr β 1Curr
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Sec. 4.2 Stacks 131Example 4.3 The
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Sec. 4.3 Queues 133/** Queue ADT */
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Sec. 4.3 Queues 135frontfront20 512
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Sec. 4.3 Queues 137// Array-based q
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Sec. 4.4 Dictionaries 139enqueue pl
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Sec. 4.4 Dictionaries 141Method cle
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Sec. 4.4 Dictionaries 143// Contain
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Sec. 4.4 Dictionaries 145/** Dictio
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Sec. 4.5 Further Reading 1474.5 Fur
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Sec. 4.6 Exercises 149(a) The data
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Sec. 4.7 Projects 1514.3 Use singly
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5Binary TreesThe list representatio
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Sec. 5.1 Definitions and Properties
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Sec. 5.1 Definitions and Properties
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Sec. 5.2 Binary Tree Traversals 159
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Sec. 5.2 Binary Tree Traversals 161
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Page 218 and 219: Sec. 5.8 Exercises 199Many techniqu
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Page 268 and 269: Sec. 7.5 Quicksort 249static
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Sec. 7.7 Binsort and Radix Sort 263
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Sec. 7.8 An Empirical Comparison of
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Sec. 7.9 Lower Bounds for Sorting 2
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Sec. 7.9 Lower Bounds for Sorting 2
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Sec. 7.10 Further Reading 271• A
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Sec. 7.11 Exercises 2737.7 Recall t
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Sec. 7.12 Projects 2757.16 (a) Devi
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Sec. 7.12 Projects 277classmates? W
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280 Chap. 8 File Processing and Ext
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318 Chap. 9 SearchingThis and the f
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320 Chap. 9 Searchingelement in L,
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322 Chap. 9 SearchingThis is equal
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324 Chap. 9 Searching9.2 Self-Organ
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326 Chap. 9 SearchingWhen a frequen
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328 Chap. 9 Searchingand the total
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330 Chap. 9 SearchingThe set differ
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334 Chap. 9 SearchingExample 9.6 A
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336 Chap. 9 Searchingand the next f
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338 Chap. 9 Searching01HashTable100
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344 Chap. 9 SearchingExample 9.9 Co
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346 Chap. 9 Searchingproject at the
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348 Chap. 9 SearchingIf N and M are
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350 Chap. 9 SearchingDepending on t
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352 Chap. 9 SearchingBentley et al.
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354 Chap. 9 Searching(c) How many s
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356 Chap. 9 Searching9.5 Implement
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358 Chap. 10 Indexingfile is create
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PART IVAdvanced Data Structures387
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390 Chap. 11 Graphs04123147123(a)(b
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392 Chap. 11 Graphs0 1 2 3 40201 11
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394 Chap. 11 GraphsThe adjacency ma
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396 Chap. 11 Graphsedge list. Funct
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398 Chap. 11 Graphspublic int weigh
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400 Chap. 11 Graphs}// Store edge w
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402 Chap. 11 GraphsABABCCDDFFEE(a)(
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404 Chap. 11 Graphs// Breadth first
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406 Chap. 11 GraphsAInitial call to
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408 Chap. 11 Graphsstatic void tops
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410 Chap. 11 Graphs// Compute short
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412 Chap. 11 Graphs// Dijkstra’s
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414 Chap. 11 Graphs// Compute a min
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416 Chap. 11 GraphsMarkedVertices v
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418 Chap. 11 GraphsInitialA B C D E
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420 Chap. 11 Graphs2 511032041032 6
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422 Chap. 11 Graphstriangular matri
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424 Chap. 12 Lists and Arrays Revis
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PART VTheory of Algorithms479
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482 Chap. 14 Analysis Techniquesthi
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484 Chap. 14 Analysis TechniquesExa
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486 Chap. 14 Analysis Techniquesthe
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488 Chap. 14 Analysis Techniquesof
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490 Chap. 14 Analysis TechniquesHow
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492 Chap. 14 Analysis Techniques= 2
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494 Chap. 14 Analysis TechniquesNot
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500 Chap. 14 Analysis Techniquesfro
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502 Chap. 14 Analysis Techniques14.
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504 Chap. 14 Analysis Techniques}G.
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15Lower BoundsHow do I know if I ha
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Sec. 15.1 Introduction to Lower Bou
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Sec. 15.2 Lower Bounds on Searching
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Sec. 15.3 Finding the Maximum Value
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Sec. 15.4 Adversarial Lower Bounds
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Sec. 15.4 Adversarial Lower Bounds
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Sec. 15.5 State Space Lower Bounds
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Sec. 15.5 State Space Lower Bounds
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Sec. 15.6 Finding the ith Best Elem
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Sec. 15.7 Optimal Sorting 525search
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Sec. 15.8 Further Reading 527Merge
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Sec. 15.9 Exercises 52915.10 Show t
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16Patterns of AlgorithmsThis chapte
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Sec. 16.1 Dynamic Programming 533dy
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Sec. 16.1 Dynamic Programming 535ar
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Sec. 16.2 Randomized Algorithms 537
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Sec. 16.3 Numerical Algorithms 545e
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Sec. 16.3 Numerical Algorithms 547d
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Sec. 16.3 Numerical Algorithms 549W
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Sec. 16.3 Numerical Algorithms 5511
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Sec. 16.3 Numerical Algorithms 553i
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Sec. 16.3 Numerical Algorithms 555b
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Sec. 16.6 Projects 55716.8 What is
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560 Chap. 17 Limits to Computations
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562 Chap. 17 Limits to Computationf
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564 Chap. 17 Limits to ComputationP
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592 Chap. 17 Limits to Computationt
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594 BIBLIOGRAPHY[BG00] Sara Baase a
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596 BIBLIOGRAPHY[LLKS85] E.L. Lawle
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598 BIBLIOGRAPHY[WMB99][Zei07]I.H.
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600 INDEXbest fit, see memory manag
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602 INDEXrelation, 27, 50estimating
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604 INDEXinteger representation, 5,
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606 INDEXpath compression, 215-216,
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608 INDEXterminology, 236-237spatia
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