void FrequencyCounter()
{
ISearchTable <string, int> searchTable = null;
var file = File.OpenRead("tale.txt");
Scanner scanner = new Scanner(new StreamReader(file));
Dictionary <string, int> dic = new Dictionary <string, int>();
StopWatch stopWatch = new StopWatch();
while (scanner.HasNext())
{
var word = scanner.Read();
//if (word.Length <= 4)
// continue;
if (!dic.ContainsKey(word))
{
dic.Add(word, 1);
}
else
{
dic[word]++;
}
}
Console.WriteLine(stopWatch.ElapsedTime);
var list = dic.Where((keyPair) => keyPair.Key.Length > 3).ToList();
list.Sort((v1, v2) => v2.Value.CompareTo(v1.Value));
Console.WriteLine(stopWatch.ElapsedTime);
int i = 0;
while (i++ < 10)
{
StdOut.Println(list[i]);
}
}
private static void ShortestPath()
{
string filename = "mediumEWD.txt";
Scanner scanner = new Scanner(new StreamReader(File.OpenRead(filename)));
IEdgeWeightedDIgraph G = new EdgeWeightedDigraph(scanner);
StdOut.Print("输入一个边：");
int s = StdIn.ReadInt();
IShortestPath sp = new DijkstraSP(G, s);
for (int t = 0; t < G.V; t++)
{
StdOut.Print(s + " to " + t);
StdOut.Printf(" ({0}): ", sp.DistTo(t));
if (sp.HasPathTo(t))
{
foreach (var e in sp.PathTo(t))
{
StdOut.Print(e + " ");
}
}
StdOut.Println();
}
DijkstraAllPairsSP allPairsSP = new DijkstraAllPairsSP(G);
StdOut.Println();
StdOut.Println(allPairsSP.Dist(1, 28));
//string filename2 = "tinyEWDAG.txt";
//scanner = new Scanner(new StreamReader(File.OpenRead(filename2)));
//G = new EdgeWeightedDigraph(scanner);
//IShortestPath sp2 = new AcyclicSP(G, s);
//for (int t = 0; t < G.V; t++)
//{
// StdOut.Print(s + " to " + t);
// StdOut.Printf(" ({0}): ", sp2.DistTo(t));
// if (sp2.HasPathTo(t))
// foreach (var e in sp.PathTo(t))
// {
// StdOut.Print(e + " ");
// }
// StdOut.Println();
//}
//filename = "tinyEWDnc.txt";
//scanner = new Scanner(new StreamReader(File.OpenRead(filename)));
//G = new EdgeWeightedDigraph(scanner);
//sp = new BellmanFordSP(G, s);
//for (int t = 0; t < G.V; t++)
//{
// StdOut.Print(s + " to " + t);
// StdOut.Printf(" ({0}): ", sp.DistTo(t));
// if (sp.HasPathTo(t))
// foreach (var e in sp.PathTo(t))
// {
// StdOut.Print(e + " ");
// }
// StdOut.Println();
//}
}
private static void PrintArray(string[] strings)
{
foreach (var s in strings)
{
StdOut.Println(s);
}
}
private static void DiGraph()
{
IDiGraph G = new DiGraph.DiGraph(new Scanner(new StreamReader(File.OpenRead("tinyDG.txt"))));
Bag <int> sources = new Bag <int>();
StdOut.Println("搜索几个结点：");
int i = StdIn.ReadInt();
while (i-- > 0)
{
sources.Add(StdIn.ReadInt());
}
DirectedDFS reachable = new DirectedDFS(G, sources);
for (int v = 0; v < G.V; v++)
{
if (reachable.Marked(v))
{
StdOut.Print(v + " ");
}
}
//string filename = "jobs.txt"; //文件有问题
//string seperator = "/";
//SymbolDiGraph sg = new SymbolDiGraph(filename, seperator);
//Topological topological = new Topological(sg.G);
//foreach (int v in topological.Order)
// StdOut.Println(sg.Name(v));
StdOut.Println();
StdOut.Println("强连通分量的数量");
ISCC scc = new KosarajuSCC(G);
StdOut.Println(scc.Count);
}
public static void Show <T>(T[] a) where T : IComparable <T>
{
foreach (var item in a)
{
StdOut.Print(item + " ");
}
StdOut.Println();
}
static void Main(string[] args)
{
Stack <string> stack = new Stack <string>();
Queue <string> q = new Queue <string>();
Bag <string> b = new Bag <string>();
Deque <string> deque = new Deque <string>();
while (!StdIn.IsEmpty())
{
string item = StdIn.ReadString();
b.Add(item);
stack.Push(item);
deque.PushLeft(item);
if (!item.Equals("-"))
{
q.Enqueue(item);
}
//else if (!q.IsEmpty)
//StdOut.Print(q.Dequeue() + " ");
}
stack.Reverse();
Queue <string> q2 = new Queue <string>(q);
q.Reverse();
while (!q2.IsEmpty)
{
StdOut.Print(q2.Dequeue() + " ");
}
while (!q.IsEmpty)
{
StdOut.Print(q.Dequeue() + " ");
}
Stack <string> stack2 = new Stack <string>(stack);
while (!stack.IsEmpty)
{
StdOut.Print(stack.Pop() + " ");
}
while (!stack2.IsEmpty)
{
StdOut.Print(stack2.Pop() + " ");
}
StdOut.Println();
while (!deque.IsEmpty)
{
StdOut.Print(deque.PopRight() + " ");
}
StdOut.Println();
foreach (var item in b)
{
StdOut.Print(item + " ");
}
}
private static void ShowMSTResult(IEdgeWeightGraph G, IMST mst)
{
//StdOut.Println(G.ToString());
foreach (var edge in mst.Edges())
{
StdOut.Println(edge);
}
StdOut.Println(mst.Weight);
}
private static void Q3String()
{
var fileName = "3String.txt";
var strings = ReadFile(fileName);
PrintArray(strings);
StdOut.Println("After sorting...");
Quick3String.Sort(strings);
PrintArray(strings);
}
private static void MSDSort()
{
var fileName = "MSD.txt";
var strings = ReadFile(fileName);
PrintArray(strings);
StdOut.Println("After sorting.....");
MSD.Sort(strings);
PrintArray(strings);
}
private static void LSDSort()
{
var fileName = "LSD.txt";
var strings = ReadFile(fileName);
PrintArray(strings);
StdOut.Println("After sorting.....");
LSD.Sort(ref strings, strings[0].Length);
PrintArray(strings);
}
static void Main(string[] args)
{
//StdOut.Println(SearchTableExamples.TimeInput(SearchTableOptions.SequantialST));
//StdOut.Println(SearchTableExamples.TimeInput(SearchTableOptions.BinarySearchST));
StdOut.Println(SearchTableExamples.TimeInput(SearchTableOptions.BST, true));
StdOut.Println(SearchTableExamples.TimeInput(SearchTableOptions.RedBlack, true));
StdOut.Println(SearchTableExamples.TimeInputForHashST(HashTableOptions.LinearProbiningHash));
StdOut.Println(SearchTableExamples.TimeInputForHashST(HashTableOptions.SeparateChainingHash));
}
private static void DoSearch(IStringSearch stringSearch, string pat, string text)
{
StdOut.Println("text: " + text);
int offset = stringSearch.Search(text);
StdOut.Print("pattern: ");
for (int i = 0; i < offset; i++)
{
StdOut.Print(" ");
}
StdOut.Println(pat);
}
private static void TestRank()
{
int[] ints = StdIn.ReadAllInts();
Array.Sort(ints);
while (!StdIn.IsEmpty())
{
int key = StdIn.ReadInt();
if (Rank(key, ints) < 0)
{
StdOut.Println(key); //如果不在名单里 则打印
}
}
}
private static void Regax()
{
var scanner = new Scanner(new StreamReader(File.OpenRead("tinyL.txt")));
string pattern = "(A*B|AC)D";
NFARegex regex = new NFARegex(pattern);
while (scanner.HasNextLine())
{
string txt = scanner.ReadLine();
if (regex.Recognizes(txt))
{
StdOut.Println(txt);
}
}
}
private static void MST()
{
int i = 0;
StdOut.Println("输入选择：0，1");
i = StdIn.ReadInt();
string filename = i switch
{
0 => "tinyEWG.txt",
1 => "mediumEWG.txt",
_ => throw new Exception("no file name is assigned"),
};
IEdgeWeightGraph G = new EdgeWeightGraph(new Scanner(new StreamReader(File.OpenRead(filename))));
IMST mst = new LazyPrimMST(G);
IMST mst2 = new PrimeMST(G);
IMST mst3 = new KruskalMST(G);
ShowMSTResult(G, mst);
ShowMSTResult(G, mst2);
ShowMSTResult(G, mst3);
}
static void Main(string[] args)
{
//LSDSort();
//MSDSort();
//Q3String();
//StringSearch();
//Regax();
for (; !BinaryStdIn.IsEmpty();)
{
if (BinaryStdIn.ReadBoolean())
{
StdOut.Print("1");
}
else
{
StdOut.Print("0");
}
}
StdOut.Println();
}
private static void Graph()
{
Graph graph = new Graph(new Scanner(new StreamReader(File.OpenRead("tinyG.txt"))));
Graph graph2 = new Graph(new Scanner(new StreamReader(File.OpenRead("tinyCG.txt"))));
StdOut.Println("输入一个数字: ");
int s = StdIn.ReadInt();
ISearch search = new DepthFirstSearch(graph, s);
for (int v = 0; v < graph.V; v++)
{
if (search.Marked(v))
{
StdOut.Print(v + " ");
}
}
StdOut.Println();
StdOut.Println();
StdOut.Println();
ICC cc = new DepthFirstSearch(graph, s).InitCC();
int M = cc.CountCC();
StdOut.Println(M + " components");
Bag <int>[] components = new Bag <int> [M];
for (int i = 0; i < M; i++)
{
components[i] = new Bag <int>();
}
for (int v = 0; v < graph.V; v++)
{
components[cc.Id(v)].Add(v);
}
for (int i = 0; i < M; i++)
{
foreach (int v in components[i])
{
StdOut.Print(v + " ");
}
StdOut.Println();
}
StdOut.Println(cc.HasCycle);
if (search.Count() != graph.V)
{
StdOut.Print("Not ");
}
StdOut.Println("connected");
IPath path = new DepthFirstSearch(graph2, s);
for (int v = 0; v < graph2.V; v++)
{
StdOut.Print(s + " to " + v + ": ");
if (path.HasPathTo(v))
{
foreach (int x in path.PathTo(v))
{
if (x == s)
{
StdOut.Print(x);
}
else
{
StdOut.Print("-" + x);
}
}
}
StdOut.Println();
}
//符号图
string filename = "routes.txt";
string filename2 = "movies.txt";
string delim = "/";
ISymbolGraph sg = new SymbolGraph(filename2, delim);
IGraph g = sg.G;
while (StdIn.HasNextLine())
{
StdOut.Println("输入查找的字符串");
string source = StdIn.ReadLine();
foreach (int w in g.Adj(sg.Index(source)))
{
StdOut.Println(" " + sg.Name(w));
}
}
}