public void DelMax_PQWith3Element_ReturnsGreater()
{
MaxPQ <int> pq = new MaxPQ <int>(100);
pq.Insert(1);
pq.Insert(3);
pq.Insert(2);
Assert.AreEqual(3, pq.DelMax());
Assert.AreEqual(2, pq.DelMax());
Assert.AreEqual(1, pq.DelMax());
}
public void IsEmpty_AfterRemovingLastElement_ReturnsTrue()
{
MaxPQ <int> pq = new MaxPQ <int>(100);
pq.Insert(1);
pq.DelMax();
Assert.IsTrue(pq.IsEmpty());
}
static long Test(MaxPQ <int> pq, int n)
{
// 生成数据
var initData = new int[n];
var appendData = new int[n / 2];
for (var i = 0; i < n; i++)
{
initData[i] = random.Next();
}
for (var i = 0; i < n / 2; i++)
{
appendData[i] = random.Next();
}
// 开始测试
var stopwatch = new Stopwatch();
stopwatch.Start();
// 插入 n 个元素
for (var i = 0; i < n; i++)
{
pq.Insert(initData[i]);
}
// 删去一半
for (var i = 0; i < n / 2; i++)
{
pq.DelMax();
}
// 插入一半
for (var i = 0; i < n / 2; i++)
{
pq.Insert(appendData[i]);
}
// 删除全部
for (var i = 0; i < n; i++)
{
pq.DelMax();
}
stopwatch.Stop();
return(stopwatch.ElapsedMilliseconds);
}
public void DelMax_PQWithOneElement_ReturnsThatElement()
{
MaxPQ <int> pq = new MaxPQ <int>(100);
pq.Insert(1);
int retVal = pq.DelMax();
Assert.AreEqual(1, retVal);
}
static void Main(string[] args)
{
// P
// R P
// R P I
// R P O I
// P O I
// R P O I
// P O I
// O I
// O I I
// I I
// T I I
// I I
// Y I I
// I I
// I
//
// Q
// U Q
// U Q E
// Q E
// E
//
// U
//
// E
//
MaxPQ <char> pq = new MaxPQ <char>();
string input = "P R I O * R * * I * T * Y * * * Q U E * * * U * E";
foreach (char c in input)
{
if (c == ' ')
{
continue;
}
else if (c == '*')
{
pq.DelMax();
}
else
{
pq.Insert(c);
}
foreach (char n in pq)
{
Console.Write(n + " ");
}
Console.WriteLine();
}
}
static void Main(string[] args)
{
// 输入格式： buy 20.05 100
var buyer = new MaxPQ <Ticket>();
var seller = new MinPQ <Ticket>();
var n = int.Parse(Console.ReadLine());
for (var i = 0; i < n; i++)
{
var ticket = new Ticket();
var item = Console.ReadLine().Split(' ');
ticket.Price = double.Parse(item[1]);
ticket.Share = int.Parse(item[2]);
if (item[0] == "buy")
{
buyer.Insert(ticket);
}
else
{
seller.Insert(ticket);
}
}
while (!buyer.IsEmpty() && !seller.IsEmpty())
{
if (buyer.Max().Price < seller.Min().Price)
{
break;
}
var buy = buyer.DelMax();
var sell = seller.DelMin();
Console.Write("sell $" + sell.Price + " * " + sell.Share);
if (buy.Share > sell.Share)
{
Console.WriteLine(" -> " + sell.Share + " -> $" + buy.Price + " * " + buy.Share + " buy");
buy.Share -= sell.Share;
buyer.Insert(buy);
}
else if (buy.Share < sell.Share)
{
sell.Share -= buy.Share;
seller.Insert(sell);
Console.WriteLine(" -> " + buy.Share + " -> $" + buy.Price + " * " + buy.Share + " buy");
}
else
{
Console.WriteLine(" -> " + sell.Share + " -> $" + buy.Price + " * " + buy.Share + " buy");
}
}
}
public void TestMaxPQ() {
var arr = CreateRandomArray(10);
Insertion<int>.Sort(arr);
StdOut.WriteLine(arr);
var pq = new MaxPQ<int>();
foreach (int i in arr) {
pq.Insert(i);
}
while (!pq.IsEmpty) {
StdOut.WriteLine("delete max: {0}", pq.DelMax());
}
}
public void TestMaxPQ()
{
int amounts = 10;
MaxPQ pq = new MaxPQ(amounts);
Random rand = new Random();
for (int i = 0; i < amounts; i++)
pq.Insert(rand.Next(0, 1000).ToString());
Debug.WriteLine(Sort.Show(pq.PQs));
pq.DelMax();
Debug.WriteLine(Sort.Show(pq.PQs));
}
public void TestAdd()
{
int[] a = Range(100);
Shuffle(a);
MaxPQ <int> pq = new MaxPQ <int>();
pq.Add(10);
Assert.AreEqual(10, pq.Peek());
pq.Add(20);
Assert.AreEqual(20, pq.Peek());
for (int i = 0; i < 20; ++i)
{
pq.Add(i);
Assert.AreEqual(i + 3, pq.Count);
Assert.AreEqual(20, pq.Peek());
}
Assert.AreEqual(20, pq.DelMax());
Assert.AreEqual(19, pq.DelMax());
foreach (int val in a)
{
pq.Add(val);
}
Assert.AreEqual(99, pq.Peek());
}
static long Test(MaxPQ <int> pq, int[] data)
{
Stopwatch sw = new Stopwatch();
sw.Start();
for (int i = 0; i < data.Length; i++)
{
pq.Insert(data[i]);
}
for (int i = 0; i < data.Length; i++)
{
pq.DelMax();
}
sw.Stop();
return(sw.ElapsedMilliseconds);
}
public void TestMaxPQ()
{
var arr = CreateRandomArray(10);
Insertion <int> .Sort(arr);
StdOut.WriteLine(arr);
var pq = new MaxPQ <int>();
foreach (int i in arr)
{
pq.Insert(i);
}
while (!pq.IsEmpty)
{
StdOut.WriteLine("delete max: {0}", pq.DelMax());
}
}
public void TestMaxPQ()
{
var pq = new MaxPQ <int>();
for (var i = 0; i < 100; ++i)
{
pq.Enqueue(i);
}
Assert.Equal(100, pq.Count);
Assert.False(pq.IsEmpty);
for (var i = 0; i < 100; ++i)
{
Assert.Equal(99 - i, pq.DelMax());
Assert.Equal(99 - i, pq.Count);
}
Assert.True(pq.IsEmpty);
foreach (var v in pq)
{
console.WriteLine("{0}", v);
}
}
static int Test(int n, MaxPQ <int> pq)
{
var timer = new Timer(1000);
timer.Elapsed += new ElapsedEventHandler(StopRunning);
for (var i = 0; i < n; i++)
{
pq.Insert(random.Next());
}
var delCount = 0;
StartRunning();
timer.Start();
while (isRunning && !pq.IsEmpty())
{
pq.DelMax();
delCount++;
}
timer.Stop();
return(delCount);
}
static void Main(string[] args)
{
var pq = new MaxPQLinked <char>();
var pq2 = new MaxPQ <char>();
// 利用 2.4.6 的输入做测试
var input = "P R I O * R * * I * T * Y * * * Q U E * * * U * E";
foreach (var c in input)
{
if (c == ' ')
{
continue;
}
else if (c == '*')
{
Console.WriteLine(pq.DelMax() + " " + pq2.DelMax());
}
else
{
pq.Insert(c);
pq2.Insert(c);
}
}
}
public IEnumerable<int> KSE_MaxHeap(int[] A, int K){
var pq = new MaxPQ(A);
for(int i=0; i<K; i++)
yield return pq.DelMax();
}
public void DelMax_EmptyPQ_ThrowsExceltion()
{
MaxPQ <int> pq = new MaxPQ <int>(100);
pq.DelMax();
}