public Street(Facility linkedFacility, double streetDistance)
{
this.LinkedFacility = linkedFacility;
this.StreetDistance = streetDistance;
}
static void Main(string[] args)
{
//string initData = "3 2 1";
//string hospitals = "1";
//string[] streets =
//{
// "1 2 1",
// "3 2 2"
//};
string initData = Console.ReadLine();
string hospitals = Console.ReadLine();
string[] inputDataSplit = initData.Split(' ');
string[] hospitalsIDs = hospitals.Split(' ');
int facilitiesCount = int.Parse(inputDataSplit[0]);
int streetsCount = int.Parse(inputDataSplit[1]);
int hospitalsCount = hospitalsIDs.Length;
string[] streets = new string[streetsCount];
for (int streetLine = 0; streetLine < streetsCount; streetLine++)
{
streets[streetLine] = Console.ReadLine();
}
List <Facility> facilities = new List <Facility>();
List <Facility> hospitalFacilities = new List <Facility>();
bool[] hospitalsChecker = new bool[facilitiesCount + 1];
foreach (var hospID in hospitalsIDs)
{
hospitalsChecker[int.Parse(hospID)] = true;
}
Facility newFacility;
for (int i = 1; i <= facilitiesCount; i++)
{
newFacility = new Facility(i);
if (hospitalsChecker[i])
{
newFacility.IsHospital = true;
hospitalFacilities.Add(newFacility);
}
facilities.Add(newFacility);
}
Dictionary <Facility, List <Street> > map = new Dictionary <Facility, List <Street> >();
foreach (var streetData in streets)
{
string[] streetValues = streetData.Split(' ');
Facility currFacility = facilities[int.Parse(streetValues[0]) - 1];
Facility targetFacility = facilities[int.Parse(streetValues[1]) - 1];
double streetDistance = double.Parse(streetValues[2]);
if (map.ContainsKey(currFacility))
{
map[currFacility].Add(new Street(targetFacility, streetDistance));
}
else
{
map.Add(currFacility, new List <Street> {
new Street(targetFacility, streetDistance)
});
}
}
double minDistance = double.PositiveInfinity;
double overallDistance = 0;
foreach (var hospital in hospitalFacilities)
{
FindClosestHospital(map, hospital);
foreach (var item in facilities)
{
Console.WriteLine("{0} -> {1} = {2}", hospital.ID, item.ID, item.Distance);
}
for (int i = 0; i < facilities.Count; i++)
{
if (!facilities[i].IsHospital)
{
overallDistance += facilities[i].Distance;
}
}
if (overallDistance < minDistance)
{
minDistance = overallDistance;
}
}
Console.WriteLine(minDistance);
}
// Dijkstra Find shortest path
private static void FindClosestHospital(Dictionary <Facility, List <Street> > map, Facility hospital)
{
PriorityQueue <Facility> queue = new PriorityQueue <Facility>();
foreach (var streetFacility in map)
{
if (hospital.ID != streetFacility.Key.ID)
{
streetFacility.Key.Distance = double.PositiveInfinity;
queue.Enqueue(streetFacility.Key);
}
}
hospital.Distance = 0;
queue.Enqueue(hospital);
while (queue.Count > 0)
{
Facility currFacility = queue.Peek();
if (currFacility.Distance == double.PositiveInfinity)
{
break;
}
foreach (var linkedFacility in map[currFacility])
{
double pottentialDistance = currFacility.Distance + linkedFacility.StreetDistance;
if (pottentialDistance < linkedFacility.LinkedFacility.Distance)
{
linkedFacility.LinkedFacility.Distance = pottentialDistance;
Facility next = new Facility(linkedFacility.LinkedFacility.ID);
next.Distance = pottentialDistance;
queue.Enqueue(next);
}
}
queue.Dequeue();
}
}
