算法第四版练习题答案

算法第4版练习题答案

Algorithms 4th edition exercise answers.

1	FUNDAMENTALS
1.2.13	Transaction.java	transaction data type
1.2.16	Rational.java	rational number data type
1.2.19	Date.java	date data type
1.3.1	FixedCapacityStackOfStrings.java	add isFull() method to stack
1.3.4	Parentheses.java	balanced parentheses
1.3.7	Stack.java	add peek() method to stack
1.3.10	InfixToPostfix.java	infix-to-postfix conversion
1.3.11	EvaluatePostfix.java	evaluate a postfix expression
1.3.14	ResizingArrayQueue.java	resizing array queue
1.3.37	Josephus.java	Josephus problem
1.4.14	FourSum.java	brute-force 4-sum
1.5.7	QuickUnionUF.java	quick union
1.5.7	QuickFindUF.java	quick find
1.5.17	ErdosRenyi.java	Erdos-Renyi simulation
2	SORTING
2.1.1	TraceSelection.java	trace of selection sort
2.1.4	TraceInsertion.java	trace of insertion sort
2.1.9	TraceShell.java	trace of shellsort
2.1.21	Transaction.java	add natural order to Transaction
2.1.22	SortTransactions.java	sort transactions
2.1.23	InsertionX.java	insertion sort with sentinel
2.1.24	InsertionX.java	insertion sort with half exchanges
2.2.2	TraceMerge.java	mergesort trace
2.2.3	TraceMergeBU.java	bottom-up mergesort trace
2.2.9	Merge.java	mergesort without static array
2.2.11	MergeX.java	improved mergesort
2.2.19	Inversions.java	count number of inversions
2.2.20	Merge.java	index sort
2.3.1	TracePartition.java	partition trace
2.3.2	TraceQuick.java	quicksort trace
2.3.5	Sort2distinct.java	sort array with 2 distinct keys
2.3.12	TraceQuick3way.java	3-way quicksort trace
2.3.16	QuickBest.java	best-case for quicksort
2.3.22	QuickX.java	Bentley-McIlroy 3-way quicksort
2.4.3	OrderedArrayMaxPQ.java	ordered array priority queue
2.4.3	UnorderedArrayMaxPQ.java	unordered array priority queue
2.4.15	MaxPQ.java	check if an array is heap-ordered
2.4.25	CubeSum.java	find a^3 + b^3 = c^3 + d^3
2.4.33	IndexMaxPQ.java	index priority queue
2.5.8	Frequency.java	count word frequencies
2.5.12	SPT.java	shortest processing time first rule
2.5.13	LPT.java	longest processing time first rule
2.5.14	Domain.java	sort by reverse domain name
2.5.16	California.java	2003 California gubernatorial election order
2.5.19	KendallTau.java	Kendall Tau distance
2.5.24	StableMinPQ.java	stable priority queue
2.5.25	Point2D.java	point comparators
2.5.27	Insertion.java	index sort
2.5.28	FileSorter.java	sort files by name
3	SEARCHING
3.1.1	GPA.java	compute GPA
3.1.2	ArrayST.java	unordered-array symbol table
3.1.5	SequentialSearchST.java	add size(), delete(), and keys()
3.1.16	BinarySearchST.java	add delete()
3.1.17	BinarySearchST.java	add floor()
3.1.29	TestBinarySearchST.java	test client
3.1.30	BinarySearchST.java	check internal invariants
3.2.6	BST.java	add height() method
3.2.10	TestBST.java	test client
3.2.13	NonrecursiveBST.java	nonrecursive BST
3.2.24	PerfectBalance.java	perfectly balanced BST
3.2.32	BST.java	order check
3.2.33	BST.java	rank/select check
4	GRAPHS
4.1.3	Graph.java	add copy constructor
4.1.13	BreadthFirstPaths.java	add distTo() method
4.1.23	BaconHistogram.java	histogram of Bacon numbers
4.1.26	DegreesOfSeparationDFS.java	degrees of separation with DFS
4.1.27	MemoryOfGraph.java	memory of Graph data type
4.1.36	Bridge.java	find bridges
4.2.3	Digraph.java	add copy constructor
4.2.21	MemoryOfDigraph.java	memory of Digraph data type
4.2.23	DirectedEulerianCycle.java	directed Eulerian cycle
4.2.31	TopologicalQueue.java	queue-based topologial sort
4.2.39	WebCrawler.java	web crawler
4.3.9	EdgeWeightedGraph.java	edge-weighted graph constructor
4.3.11	MemoryOfEdgeWeightedGraph.java	memory of edge-weighted graph
4.3.17	EdgeWeightedGraph.java	add toString() to EdgeWeightedGraph
4.3.21	PrimMST.java	add edges() to PrimMST
4.3.22	PrimMST.java	minimum spanning forrest
4.3.22	KruskalMST.java	minimum spanning forrest
4.3.33	KruskalMST.java	MST certification
4.3.43	BoruvkaMST.java	Boruvka's algorithm
4.4.2	EdgeWeightedDigraph.java	add toString() method
4.4.11	MemoryOfEdgeWeightedDigraph.java	memory of EdgeWeightedDigraph data type
4.4.12	Topological.java	topological sort in edge-weighted digraphs
4.4.12	EdgeWeightedDirectedCycle.java	directed cycle in edge-weighted digraphs
4.4.28	AcyclicLP.java	longest paths in DAGs
4.4.35	LazyDijkstraSP.java	lazy implementation of Dijkstra