public static float UglyPermutBruteForce(tspclass tsp, out int permutCount)
{
float bestDistance = 0;
permutCount = 0;
List <int> startPermutList = new List <int>();
for (int i = 0; i < tsp.Dimension; i++)
{
startPermutList.Add(i);
}
// foreach (int city in startPermutList)
// {
// Console.Write(" " + city);
// } Console.WriteLine(" -----\n");
foreach (int[] test in Utils.Permut(startPermutList.ToArray()))
{
List <int> ArrayList = new List <int>(test);
ArrayList.Add(ArrayList[0]);
Tour newT = new Tour(tsp.Dimension + 1, ArrayList.ToArray());
float newDistance = tsp.GetTourDistance(newT);
if (permutCount == 0)
{
bestDistance = newDistance;
}
//Console.WriteLine(newT.ToString() + "::> " + newDistance);
if (newDistance < bestDistance)
{
bestDistance = newDistance;
}
permutCount++;
}
return(bestDistance);
}
static void Main(string[] args)
{
ParseTPS parser = new ParseTPS();
tspclass tspFile = null;
Stopwatch stopWatch = new Stopwatch();
string fileName;
int typeOfSearch = 0;
List <Tour> ListTours = new List <Tour>();
//ListTours.Add(new Tour(7,new List<int>{0,1,2,3,4,5,6}.ToArray())); //TODO Change this to a proper Array
//Tour startTour = new Tour(18, new List<int> { 15, 16, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 15 }.ToArray());
// for (int i = 0; i < 4; i++)
// {
// List<int> tempList = Utils.GenerateStartList(6);
// ListTours.Add(new Tour(6, tempList.ToArray()));
// }
// int tc = 0;
// foreach (Tour tour in ListTours)
// {
// Console.WriteLine(tour.ToString());
// Console.Write("TOUR LIST " + tc + "\n");
// tc++;
// }
Console.WriteLine("\nPlease enter the name of the .tsp file\n");
//OTHER FILES JSON
fileName = Console.ReadLine();
Console.WriteLine("fileName: " + fileName);
Console.ReadKey();
//fileName = "gr17";
bool fileExists = File.Exists(@"tspjson/" + fileName + ".json");
if (fileExists)
{
tspFile = JsonConvert.DeserializeObject <tspclass>(File.ReadAllText(@"tspjson/" + fileName + ".json"));
}
else
{
Console.WriteLine("File do not exist");
}
Console.WriteLine("OptDistance :" + tspFile.OptDistance);
Console.WriteLine("OptTour :" + tspFile.OptTour.Length);
Console.WriteLine("Format :" + tspFile.Format);
foreach (int city in tspFile.OptTour)
{
Console.Write(" " + city);
}
#region Distance Matrix
//DISTANCE MATRIX
Console.WriteLine("\nDistance Matrix");
foreach (int[] row in tspFile.DistanceMatrix)
{
foreach (int i in row)
{
Console.Write(" " + i);
}
Console.WriteLine();
}
#endregion
Console.WriteLine("SELECIONE O TIPO DE BUSCA\n");
Console.WriteLine("1 - Iterated Local Search\n");
Console.WriteLine("2 - Simulated Anneling\n");
Console.WriteLine("-1 Encerrar o programa\n");
typeOfSearch = Convert.ToInt32(Console.ReadLine());
while (typeOfSearch != -1)
{
Tour startTour = new Tour(tspFile.Dimension + 1, Utils.GenerateStartList(tspFile.Dimension + 1).ToArray());
ListTours.Add(startTour);
Console.WriteLine("RAND");
Tour startTourFList = new Tour(tspFile.Dimension + 1, Utils.GenerateStartList(tspFile.Dimension + 1).ToArray());//ListTours[0];
while (startTourFList.Cities[0] != tspFile.OptTour[0])
{
startTourFList = new Tour(tspFile.Dimension + 1, Utils.GenerateStartList(tspFile.Dimension + 1).ToArray());//ListTours[0];
}
if (typeOfSearch == 1)
{
Console.WriteLine("\nILS\n");
int twoOptBesttIterations = 0;
int twoOptSwaptIterations = 0;
int fourOptSwaptIterations = 0;
Tour twoOptBestTour = new Tour();
Utils.ILSLimits Limit1 = new Utils.ILSLimits(100, 50, 4, 30);
stopWatch.Start();
float twoOptBestDistance = ILS.IteratedLocalSearch(tspFile, startTourFList, out twoOptBesttIterations, out twoOptSwaptIterations, out fourOptSwaptIterations, out twoOptBestTour, Limit1);
stopWatch.Stop();
Console.WriteLine("TIME: " + Utils.PrintStopwatch(stopWatch.Elapsed));
Console.Write("::> " + startTourFList.ToString() + " START TOUR DISTANCE: " + tspFile.GetTourDistance(startTourFList) + "\n");
if (twoOptBesttIterations != -1)
{
Console.Write("::> " + twoOptBestTour.ToString() + " BEST TOUR DISTANCE: " + twoOptBestDistance + "\n");
Console.Write("::> " + tspFile.PrintOptTour() + " OPTIMAL TOUR DISTANCE: " + tspFile.OptDistance + "\n");
Console.WriteLine();
Console.WriteLine("BEST ITERATIONS: " + twoOptBesttIterations);
Console.WriteLine("TOTAL FOUR SWAP ITERATIONS: " + fourOptSwaptIterations);
Console.WriteLine("TOTAL TWO SWAP ITERATIONS: " + twoOptSwaptIterations);
}
Console.WriteLine();
}
else if (typeOfSearch == 2)
{
Console.WriteLine("\nSA\n");
int saBesttIterations = 0;
int saSwaptIterations = 0;
int saFourSwaptIterations = 0;
int saTempIterations = 0;
Tour SABestTour = new Tour();
Utils.SALimits Limit2 = new Utils.SALimits(200, 500, 0.994f, 120);
stopWatch.Start();
float SABestDistance = SA.SimulatedAnneling(tspFile, startTourFList, out saBesttIterations, out saSwaptIterations, out saFourSwaptIterations, out saTempIterations, out SABestTour, Limit2);
stopWatch.Stop();
Console.WriteLine("TIME: " + Utils.PrintStopwatch(stopWatch.Elapsed) + " MS: " + stopWatch.ElapsedMilliseconds);
Console.Write("::> " + startTourFList.ToString() + " START TOUR DISTANCE: " + tspFile.GetTourDistance(startTourFList) + "\n");
if (saBesttIterations != -1)
{
Console.Write("::> " + SABestTour.ToString() + " BEST TOUR DISTANCE: " + SABestDistance + "\n");
Console.Write("::> " + tspFile.PrintOptTour() + " OPTIMAL TOUR DISTANCE: " + tspFile.OptDistance + "\n");
Console.WriteLine();
Console.WriteLine("BEST ITERATIONS: " + saBesttIterations);
Console.WriteLine("TOTAL TEMP SWAP ITERATIONS: " + saTempIterations);
Console.WriteLine("TOTAL TWO SWAP ITERATIONS: " + saSwaptIterations);
}
Console.WriteLine();
}
else
{
Console.WriteLine("SELECIONE O TIPO DE BUSCA\n");
Console.WriteLine("1 - Iterated Local Search\n");
Console.WriteLine("2 - Simulated Anneling\n");
Console.WriteLine("-1 Encerrar o programa\n");
typeOfSearch = Convert.ToInt32(Console.ReadLine());
}
Console.WriteLine("SELECIONE O TIPO DE BUSCA\n");
Console.WriteLine("1 - Iterated Local Search\n");
Console.WriteLine("2 - Simulated Anneling\n");
Console.WriteLine("-1 - Encerrar o programa\n");
typeOfSearch = Convert.ToInt32(Console.ReadLine());
}
}
public static float IteratedLocalSearch(tspclass tsp, Tour StartTour, out int newBestIterations, out int TwoSwapIterations, out int FourSwapIterations, out Tour bestTour, Utils.ILSLimits Limit)
{
newBestIterations = 0;
FourSwapIterations = 0;
TwoSwapIterations = 0;
int limitTwoOpt = 0;
int limitFourOpt = 0;
int ILS = 0;
bestTour = null;
Stopwatch stopWatch = new Stopwatch();
List <Tour> twoOptList = new List <Tour>();
if (tsp.Dimension + 1 != StartTour.Size)
{
newBestIterations = -1;
bestTour = null;
Console.WriteLine("Something is wrong with your tour mate");
return(-1); //Start tour have the wrong size for this particular tsp
}
float bestDistance = tsp.GetTourDistance(StartTour);
Tour swapedTour = StartTour;
Console.WriteLine("ILS RUNNING -- TIME LIMIT: " + Limit.Time + " TWOOPT: " + Limit.TwoOpt);
stopWatch.Start();
while (ILS < Limit.ILS && bestDistance != tsp.OptDistance && stopWatch.ElapsedMilliseconds <= (Limit.Time * 1000f))//(bestDistance != tsp.OptDistance)
{
if (ILS != 0)
{
while (limitFourOpt <= Limit.FourOpt && bestDistance != tsp.OptDistance)
{
//if(limitFourOpt%50 == 0) Console.WriteLine("4OPT" + limitFourOpt);
List <int> fourOptRandom = Utils.GenerateRandomSet(4, tsp.Dimension);
// foreach (int i in fourOptRandom)
// {
// Console.Write(" " + i);
// } Console.WriteLine();
swapedTour = FourOptSwap.GetFourOptSwap(swapedTour, fourOptRandom[0], fourOptRandom[1], fourOptRandom[2], fourOptRandom[3]);
FourSwapIterations++;
float newDistance = tsp.GetTourDistance(swapedTour);
if (newDistance >= bestDistance)
{
limitFourOpt++;
continue;
}
else
{
bestDistance = newDistance;
bestTour = swapedTour;
newBestIterations++;
limitFourOpt++;
break;
}
}
limitTwoOpt = 0;
limitFourOpt = 0;
}
while (limitTwoOpt <= Limit.TwoOpt && bestDistance != tsp.OptDistance)
{
for (var i = 1; i < StartTour.Size - 1; i++)
{
for (var k = i + 1; k < StartTour.Size - 1; k++)
{
TwoSwapIterations++;
swapedTour = TwoOptSwap.GetTwoOptSwap(swapedTour, i, k);
// if(twoOptList.FindIndex( x => (x == swapedTour))
// {
// Console.WriteLine(swapedTour.ToString());
// Console.WriteLine("You're meh");
// Environment.Exit(-1);
// }
twoOptList.Add(swapedTour);
float newDistance = tsp.GetTourDistance(swapedTour);
if (newDistance >= bestDistance)
{
continue;
}
else //if (newDistance < bestDistance)
{
//We have a new winner
//Console.WriteLine("NEW BEST: " + newBestIterations + " DISTANCE: " + newDistance + "\n");
//Console.WriteLine("L: " + limit + " SI: " + swapIterations + " BI: " + newBestIterations + " NEW: " + newDistance + " BEST: " + bestDistance);
bestDistance = newDistance;
bestTour = swapedTour;
newBestIterations++;
break;
}
}
}
if (limitTwoOpt % 2000 == 0)
{
//Utils.ClearCurrentConsoleLine();
//Console.WriteLine(" L: " + limitTwoOpt);
}
limitTwoOpt++;
}
// Console.WriteLine("AI: " + swapedTour);
ILS++;
// Utils.ClearCurrentConsoleLine();
// Utils.ClearCurrentConsoleLine();
if (ILS % 10 == 0 || stopWatch.ElapsedMilliseconds % 10000 == 0)
{
Console.WriteLine("-----------ILS: " + ILS);
}
// Console.WriteLine();
}
stopWatch.Stop();
Console.WriteLine("IT'S OVER: " + Utils.PrintStopwatch(stopWatch.Elapsed));
return(bestDistance);
}
public static float SimulatedAnneling(tspclass tsp, Tour StartTour, out int newBestIterations, out int TwoSwapIterations, out int FourSwapIterations, out int TempIterations, out Tour bestTour, Utils.SALimits Limit)
{
newBestIterations = 0;
FourSwapIterations = 0;
TwoSwapIterations = 0;
TempIterations = 0;
float currTemp;
float tempMult = Limit.TempMult;
int SA = 0;
float bestDistance = tsp.GetTourDistance(StartTour);
float currentDist, nextDist;
float deltaDiff;
Tour currentTour = StartTour;
Tour nextTour = null;
List <int> RandomSet = new List <int>();
List <int> RandomSet2 = new List <int>();
bestTour = null;
Stopwatch stopWatch = new Stopwatch();
Console.WriteLine("START TEMP: " + Limit.StartTemp + " START MULT: " + Limit.TempMult);
stopWatch.Start();
while (bestDistance != tsp.OptDistance && stopWatch.ElapsedMilliseconds <= (Limit.Time * 1000f) && SA < Limit.SA)
{
currTemp = Limit.StartTemp; //* ((SA/10) +1);
//Console.WriteLine(currTemp *= tempMult);
// RandomSet2 = Utils.GenerateRandomSet(4, tsp.Dimension);
// currentTour = FourOptSwap.GetFourOptSwap(currentTour, RandomSet2[0], RandomSet2[1], RandomSet2[2], RandomSet2[3]);
while (currTemp > 0.0013f)
{
RandomSet = Utils.GenerateRandomSetNotZero(2, tsp.Dimension);
nextTour = TwoOptSwap.GetTwoOptSwap(currentTour, RandomSet[0], RandomSet[1]);
//RandomSet2 = Utils.GenerateRandomSet(4, tsp.Dimension);
//nextTour = FourOptSwap.GetFourOptSwap(currentTour, RandomSet2[0], RandomSet2[1], RandomSet2[2], RandomSet2[3]);
//Console.WriteLine(nextTour.ToString());
TwoSwapIterations++;
currentDist = tsp.GetTourDistance(currentTour);
nextDist = tsp.GetTourDistance(nextTour);
deltaDiff = currentDist - nextDist;
if (deltaDiff > 0)
{
currentTour = nextTour;
}
else
{
if (Utils.GetNextRand() <= Math.Exp(deltaDiff / currTemp))
{
currentTour = nextTour;
}
}
if (currentDist < bestDistance)
{
bestDistance = currentDist;
bestTour = currentTour;
newBestIterations++;
}
currTemp *= tempMult;
//Console.WriteLine(currTemp);
TempIterations++;
if (TempIterations % 50000 == 0)
{
Console.WriteLine("Current Temp: " + currTemp + " :::>Current Best Tour Distance " + bestDistance);
}
}
SA++;
}
return(bestDistance);
}
