static void DijkstraFindMinCableLengthBetweenHouses(Dictionary<HouseNode,
List<CableConnection>> graph, HouseNode houseToStartFrom)
{
OrderedBag<HouseNode> houseQueue = new OrderedBag<HouseNode>();
foreach (var house in graph)
{
house.Key.MinCableLenth = int.MaxValue;
}
houseToStartFrom.MinCableLenth = 0;
houseQueue.Add(houseToStartFrom);
while (houseQueue.Count > 0)
{
var currentHouse = houseQueue.RemoveFirst();
if (currentHouse.MinCableLenth == int.MaxValue)
{
break;
}
foreach (var connection in graph[currentHouse])
{
var currentCableLength = currentHouse.MinCableLenth + connection.CableLenth;
if (connection.House.MinCableLenth > currentCableLength)
{
connection.House.MinCableLenth = currentCableLength;
houseQueue.Add(connection.House);
}
}
}
}
static void Main(string[] args)
{
Dictionary<HouseNode, List<CableConnection>> graph = new Dictionary<HouseNode, List<CableConnection>>();
var firstHouse = new HouseNode(1);
var secondHouse = new HouseNode(2);
var thirdHouse = new HouseNode(3);
var fourthHouse = new HouseNode(4);
var fifthHouse = new HouseNode(5);
graph.Add(firstHouse, new List<CableConnection>());
graph[firstHouse].Add(new CableConnection(secondHouse, 5));
graph[firstHouse].Add(new CableConnection(thirdHouse, 1));
graph[firstHouse].Add(new CableConnection(fourthHouse, 2));
graph.Add(secondHouse, new List<CableConnection>());
graph[secondHouse].Add(new CableConnection(firstHouse, 5));
graph[secondHouse].Add(new CableConnection(thirdHouse, 20));
graph[secondHouse].Add(new CableConnection(fifthHouse, 1));
graph.Add(thirdHouse, new List<CableConnection>());
graph[thirdHouse].Add(new CableConnection(firstHouse, 1));
graph[thirdHouse].Add(new CableConnection(secondHouse, 20));
graph[thirdHouse].Add(new CableConnection(fourthHouse, 4));
graph.Add(fourthHouse, new List<CableConnection>());
graph[fourthHouse].Add(new CableConnection(firstHouse, 2));
graph[fourthHouse].Add(new CableConnection(secondHouse, 3));
graph[fourthHouse].Add(new CableConnection(thirdHouse, 4));
graph[fourthHouse].Add(new CableConnection(fifthHouse, 1));
graph.Add(fifthHouse, new List<CableConnection>());
graph[fifthHouse].Add(new CableConnection(secondHouse, 1));
graph[fifthHouse].Add(new CableConnection(fourthHouse, 1));
for (int i = 0; i < graph.Count; i++)
{
var sourceHouse = graph.Keys.Skip(i).First();
DijkstraFindMinCableLengthBetweenHouses(graph, sourceHouse);
Console.WriteLine("Starting source house with ID -> {0}", sourceHouse.HouseID);
for (int j = 0; j < graph.Count; j++)
{
var currenctHouse = graph.Keys.Skip(j).First();
if (currenctHouse != sourceHouse)
{
Console.WriteLine("The min cable length path to house with ID -> {0} is {1}.", currenctHouse.HouseID, currenctHouse.MinCableLenth);
}
}
Console.WriteLine();
}
}
public CableConnection(HouseNode house, int cableLenth)
{
this.House = house;
this.CableLenth = cableLenth;
}