/// <summary>
/// Creates new algorithm instance
/// </summary>
/// <param name="input">The input</param>
public KnapsackDynamicAlgorithm(KnapsackInput <int, int> input)
{
this.Input = input;
this.Capacity = input.Capacity;
this.Variables = input.Variables;
this.memorization = new IntegerTableMemorization(input.Capacity + 1, input.Variables + 1);
}
public static void PrintResults(KnapsackInput input)
{
IList <KnapsackSolver> solvers = new List <KnapsackSolver>()
{
new BranchAndBoundSolver(input.Items, input.Capacity),
new GreedySolver(input.Items, input.Capacity),
new DynamicProgrammingSolver(input.Items, input.Capacity)
};
Console.ForegroundColor = ConsoleColor.Cyan;
Console.WriteLine("Max Capacity is {0}", input.Capacity);
Console.ForegroundColor = ConsoleColor.White;
foreach (var solver in solvers)
{
Stopwatch sw = new Stopwatch();
sw.Start();
var solution = solver.Solve();
sw.Stop();
Console.WriteLine(solution);
Console.WriteLine("Elapsed = {0}\n", sw.Elapsed);
Console.ReadKey();
}
}
private void UseSet2_Click(object sender, RoutedEventArgs e)
{
input = new KnapsackInput()
{
Capacity = 16,
Items = new List <Item>()
{
new Item()
{
Name = "1", Value = 50, Weight = 5
},
new Item()
{
Name = "2", Value = 99, Weight = 9
},
new Item()
{
Name = "3", Value = 18, Weight = 2
},
new Item()
{
Name = "4", Value = 15, Weight = 3
},
new Item()
{
Name = "5", Value = 42, Weight = 7
}
}
};
allItemsGrid.DataContext = input.Items;
itemsGrid.DataContext = null;
resultTextBlock.Text = "Result of the solution will be displayed here";
}
private void SolveMultiple100()
{
KnapsackInput input;
for (int i = 0; i < 100; i++)
{
input = new KnapsackInput();
input.GenerateRandomItems();
var stopwatch = new Stopwatch();
var solverBaB = new BranchAndBoundSolver(input.Items, input.Capacity);
var solverRand = new RandomSolver(input.Items, input.Capacity);
var solverGreedy = new GreedySolver(input.Items, input.Capacity);
var solverDynamic = new DynamicProgrammingSolver(input.Items, input.Capacity);
stopwatch.Start();
solverBaB.Solve();
stopwatch.Stop();
timeResultsBaB.Add(new DataPoint(i, stopwatch.Elapsed.TotalMilliseconds));
stopwatch.Restart();
solverRand.Solve();
stopwatch.Stop();
timeResultsRand.Add(new DataPoint(i, stopwatch.Elapsed.TotalMilliseconds));
stopwatch.Restart();
solverGreedy.Solve();
stopwatch.Stop();
timeResultsGreedy.Add(new DataPoint(i, stopwatch.Elapsed.TotalMilliseconds));
stopwatch.Restart();
solverDynamic.Solve();
stopwatch.Stop();
timeResultsDynamic.Add(new DataPoint(i, stopwatch.Elapsed.TotalMilliseconds));
}
timeAverageGreedy = Math.Round((timeResultsGreedy.Sum(x => x.Y) / 100), 4);
timeAverageRand = Math.Round((timeResultsRand.Sum(x => x.Y) / 100), 4);
timeAverageBaB = Math.Round((timeResultsBaB.Sum(x => x.Y) / 100), 4);
timeAverageDynamic = Math.Round((timeResultsDynamic.Sum(x => x.Y) / 100), 4);
}
private void UseSet1_Click(object sender, RoutedEventArgs e)
{
input = new KnapsackInput()
{
Capacity = 10,
Items = new List <Item>()
{
new Item {
Name = "1", Weight = 4, Value = 40
},
new Item {
Name = "2", Weight = 7, Value = 42
},
new Item {
Name = "3", Weight = 5, Value = 25
},
new Item {
Name = "4", Weight = 3, Value = 12
}
}
};
allItemsGrid.DataContext = input.Items;
itemsGrid.DataContext = null;
resultTextBlock.Text = "Result of the solution will be displayed here";
}
private void GenerateRandom_Click(object sender, RoutedEventArgs e)
{
input = new KnapsackInput();
input.GenerateRandomItems();
allItemsGrid.DataContext = input.Items;
itemsGrid.DataContext = null;
resultTextBlock.Text = "Result of the solution will be displayed here";
}
private void GenerateCoeff_Click(object sender, RoutedEventArgs e)
{
var coeffWindow = new DialogWindow();
if (coeffWindow.ShowDialog() == true)
{
input = new KnapsackInput(coeffWindow.Capacity, coeffWindow.AmountOfItems, coeffWindow.I, coeffWindow.J);
allItemsGrid.DataContext = input.Items;
itemsGrid.DataContext = null;
resultTextBlock.Text = "Result of the solution will be displayed here";
}
}
private void InputFile_Click(object sender, RoutedEventArgs e)
{
var inputFileWindow = new InputFileWindow();
if (inputFileWindow.ShowDialog() == true)
{
input = new KnapsackInput();
input.ReadInput(inputFileWindow.FileName);
}
allItemsGrid.DataContext = input.Items;
itemsGrid.DataContext = null;
resultTextBlock.Text = "Result of the solution will be displayed here";
}
/// <summary>
/// Прочитать входные данные из файла, обработать их и сохранить для последующих действий.
/// </summary>
/// <param name="file">Ссылка на выбранный файл.</param>
/// <exception cref="InvalidInputFileException">Входные данные в файле не в поддерживаемом формате.</exception>
public async Task SetFromFile(IFileReference file)
{
await using var stream = await file.CreateMemoryStreamAsync(4096);
using var reader = new StreamReader(stream);
var content = reader.ReadToEnd();
var decerialized = JsonConvert.DeserializeObject <KnapsackInput>(content);
if (decerialized?.Items == null || decerialized.Knapsack == null)
{
throw new InvalidInputFileException();
}
Input = decerialized;
InputUpdated?.Invoke();
}
private void InputManually_Click(object sender, RoutedEventArgs e)
{
var inputManuallyWindow = new InputManuallyWindow();
if (inputManuallyWindow.ShowDialog() == true)
{
input = new KnapsackInput()
{
Capacity = inputManuallyWindow.CapacityToAdd,
Items = new List <Item>(inputManuallyWindow.ItemsToAdd)
};
allItemsGrid.DataContext = input.Items;
itemsGrid.DataContext = null;
resultTextBlock.Text = "Result of the solution will be displayed here";
}
}
private void UseSet3_Click(object sender, RoutedEventArgs e)
{
input = new KnapsackInput()
{
Capacity = 41,
Items = new List <Item>()
{
new Item {
Name = "1", Weight = 12, Value = 14
},
new Item {
Name = "2", Weight = 40, Value = 34
},
new Item {
Name = "3", Weight = 10, Value = 12
},
new Item {
Name = "4", Weight = 18, Value = 13
},
new Item {
Name = "5", Weight = 10, Value = 16
},
new Item {
Name = "6", Weight = 12, Value = 19
},
new Item {
Name = "7", Weight = 14, Value = 22
},
new Item {
Name = "8", Weight = 16, Value = 25
}
}
};
allItemsGrid.DataContext = input.Items;
itemsGrid.DataContext = null;
resultTextBlock.Text = "Result of the solution will be displayed here";
}
public static void Main()
{
/* var input1 = ReadInput("./../../SampleInputs/easy20.txt");
* PrintResults(input1);*/
var input2 = new KnapsackInput()
{
Capacity = 25,
ExpectedResult = 44,
Items =
new List <Item>()
{
new Item {
Name = "1", Weight = 2, Value = 4
},
new Item {
Name = "2", Weight = 4, Value = 7
},
new Item {
Name = "3", Weight = 6, Value = 10
},
new Item {
Name = "4", Weight = 8, Value = 13
},
new Item {
Name = "5", Weight = 10, Value = 16
},
new Item {
Name = "6", Weight = 12, Value = 19
},
new Item {
Name = "7", Weight = 14, Value = 22
},
new Item {
Name = "8", Weight = 16, Value = 25
}
}
};
// PrintResults(input2);
var input3 = new KnapsackInput()
{
Capacity = 10,
ExpectedResult = 6,
Items = new List <Item>()
{
new Item()
{
Name = "1", Value = 40, Weight = 4
},
new Item()
{
Name = "2", Value = 42, Weight = 7
},
new Item()
{
Name = "3", Value = 25, Weight = 5
},
new Item()
{
Name = "4", Value = 12, Weight = 3
}
}
};
// PrintResults(input3);
var input4 = new KnapsackInput()
{
Capacity = 16,
ExpectedResult = 90,
Items = new List <Item>()
{
new Item {
Name = "1", Value = 40, Weight = 2
},
new Item {
Name = "2", Value = 30, Weight = 5
},
new Item {
Name = "3", Value = 50, Weight = 10
},
new Item {
Name = "4", Value = 10, Weight = 5
}
}
};
// PrintResults(input4);
var inputManually = new KnapsackInput(29, 9, 2, 3);
// PrintResults(inputManually);
var inputRandom = new KnapsackInput();
inputRandom.GenerateRandomItems();
inputRandom.PrintAllItems();
PrintResults(inputRandom);
}
public static void Main()
{
/* var input1 = ReadInput("./../../SampleInputs/easy20.txt");
* PrintResults(input1);*/
var input2 = new KnapsackInput()
{
Capacity = 18,
ExpectedResult = 44,
Items =
new List <Item>()
{
new Item {
Name = "fourth", Weight = 4, Value = 12
},
new Item {
Name = "third", Weight = 6, Value = 10
},
new Item {
Name = "second", Weight = 5, Value = 8
},
new Item {
Name = "cheese", Weight = 7, Value = 11
},
new Item {
Name = "first", Weight = 3, Value = 14
},
new Item {
Name = "potatos", Weight = 1, Value = 7
},
new Item {
Name = "bear", Weight = 6, Value = 9
}
}
};
PrintResults(input2);
var input3 = new KnapsackInput()
{
Capacity = 4,
ExpectedResult = 6,
Items = new List <Item>()
{
new Item()
{
Name = "first", Value = 2, Weight = 1
},
new Item()
{
Name = "Second", Value = 3, Weight = 2
},
new Item()
{
Name = "Third", Value = 4, Weight = 3
},
new Item()
{
Name = "Fourth", Value = 5, Weight = 4
},
new Item()
{
Name = "Second", Value = 6, Weight = 5
}
}
};
PrintResults(input3);
var input4 = new KnapsackInput()
{
Capacity = 16,
ExpectedResult = 90,
Items = new List <Item>()
{
new Item {
Name = "1", Value = 40, Weight = 2
},
new Item {
Name = "2", Value = 30, Weight = 5
},
new Item {
Name = "3", Value = 50, Weight = 10
},
new Item {
Name = "4", Value = 10, Weight = 5
}
}
};
PrintResults(input4);
}