public void PriorityQueueFindPathBetween0And2()
{
var path = DijkstraWithPriorityQueue.DijkstraAlgorithm(Graph, nodes[0], nodes[2]);
var length = nodes[2].DistanceFromStart;
var expectedPath = new[] { 0, 8, 2 };
var expectedLength = 26;
Assert.AreEqual(expectedLength, length);
CollectionAssert.AreEqual(path, expectedPath);
}
public static int FindMinPath(Dictionary <Node, Dictionary <Node, int> > graph, Dictionary <int, Node> nodes, int sourceNode, int destinationNode)
{
var path = DijkstraWithPriorityQueue.DijkstraAlgorithm(graph, nodes[sourceNode], nodes[destinationNode]);
if (path == null)
{
return(0);
}
else
{
return((int)nodes[destinationNode].DistanceFromStart);
}
}
public static void Main()
{
Dictionary <Node, Dictionary <Node, int> > graph = ReadInput();
Node start = graph.Keys.FirstOrDefault(x => x.Id == pathStart);
Node end = graph.Keys.FirstOrDefault(x => x.Id == pathEnd);
var result = DijkstraWithPriorityQueue.DijkstraAlgorithm(graph, start, end);
double percentageResult = graph.Keys.FirstOrDefault(x => x.Id == result.Last()).DistanceFromStart;
Console.WriteLine($"Most reliable path reliability: {percentageResult:F2}%");
Console.WriteLine(string.Join(" -> ", result));
}
public static void PrintPath(Dictionary <Node, Dictionary <Node, int> > graph, Dictionary <int, Node> nodes, int sourceNode, int destinationNode)
{
Console.Write(
"Shortest path [{0} -> {1}]: ",
sourceNode,
destinationNode);
var path = DijkstraWithPriorityQueue.DijkstraAlgorithm(graph, nodes[sourceNode], nodes[destinationNode]);
if (path == null)
{
Console.WriteLine("no path");
}
else
{
var formattedPath = string.Join("->", path);
Console.WriteLine("{0} (length {1})", formattedPath, nodes[destinationNode].DistanceFromStart);
}
}
public void PriorityQueueFindPathBetween0And10()
{
var path = DijkstraWithPriorityQueue.DijkstraAlgorithm(Graph, nodes[0], nodes[10]);
Assert.IsNull(path);
}
//100/100
public static void Main()
{
int[] numbers = Console.ReadLine().Split(' ').Select(y => int.Parse(y)).ToArray();
int n = numbers[0];
int m = numbers[1];
int h = numbers[2];
var nodes = new Dictionary <int, Node>();
for (int i = 0; i < n; i++)
{
nodes.Add(i + 1, new Node(i + 1));
}
int[] hospitals = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();
for (int i = 0; i < hospitals.Length; i++)
{
nodes[hospitals[i]].IsHospital = true;
}
var graph = new Dictionary <Node, Dictionary <Node, int> >();
for (int i = 0; i < n; i++)
{
graph.Add(nodes[i + 1], new Dictionary <Node, int>());
}
for (int i = 0; i < m; i++)
{
int[] inputEdge = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();
graph[nodes[inputEdge[0]]].Add(nodes[inputEdge[1]], inputEdge[2]);
graph[nodes[inputEdge[1]]].Add(nodes[inputEdge[0]], inputEdge[2]);
}
var min = int.MaxValue;
var hospitalsSet = new HashSet <int>(hospitals);
var firstNotHospital = nodes.FirstOrDefault(x => !x.Value.IsHospital).Key;
for (int i = 0; i < hospitals.Length; i++)
{
var currentHospital = hospitals[i];
var allPaths = DijkstraWithPriorityQueue.DijkstraAlgorithm(graph, nodes[currentHospital], nodes[firstNotHospital]);
var currentPath = 0;
for (int j = 0; j < allPaths.Length; j++)
{
if (!nodes[j + 1].IsHospital)
{
currentPath += allPaths[j];
}
}
for (int k = 0; k < n; k++)
{
nodes[k + 1].DistanceFromStart = double.PositiveInfinity;
}
if (currentPath < min && currentPath != 0)
{
min = currentPath;
}
}
Console.WriteLine(min);
}