public int BruteForce()
{
var solution = new BruteForce();
return(solution.RomanToInt(Input));
}
// Measure algorithms time
private static TestResult RunAlgorithms(Dataset dataSet, int measurementCount)
{
Console.WriteLine("{0}: starting calculating dateset {1}", DateTime.Now, dataSet.GetFilePath());
var csvBuilder = new StringBuilder();
csvBuilder.AppendLine(TestResultHelper.GetInstanceResultHeader());
var stopwatch = new Stopwatch();
double BFTotal = 0;
double BandBTotal = 0;
double dpTotal = 0;
double reduxTotal = 0;
double reduxErrSum = 0;
double reduxMaxErr = 0;
double greedyTotal = 0;
double greedyErrSum = 0;
double greedyMaxErr = 0;
double ftpasTotal = 0;
for (int i = 1; i <= dataSet.LastInstanceId; i++)
{
Console.WriteLine($"{DateTime.Now}::{dataSet.Name}::{dataSet.InstanceItemsCount}::{i}");
// Load instance and solution
var instance = InstanceLoader.LoadInstanceAsync(dataSet, i);
if (instance == null)
{
continue;
}
int optimalResult = InstanceLoader.LoadSolution(dataSet, i);
double bruteForceTimeAvg = 0;
double branchAndBoundTimeAvg = 0;
double dynamicProgrammingAvg = 0;
double greedyAvg = 0;
double reduxAvg = 0;
int[] greedyHeuristicResult = null;
int[] reduxHeuristicResult = null;
for (int j = 0; j < measurementCount; j++)
{
stopwatch.Reset();
// Start Brute Force
stopwatch.Start();
var bruteForceResult = BruteForce.Solve(0, instance.Weights, instance.Prices, 0, 0, instance.MaxWeight, instance.MinPrice, new int[instance.N + 1], new int[instance.N + 1]);
stopwatch.Stop();
CheckResult(instance, bruteForceResult[instance.N], optimalResult, dataSet.Name, nameof(BruteForce));
bruteForceTimeAvg += stopwatch.Elapsed.TotalMilliseconds;
stopwatch.Reset();
// Start Branch and Bound
stopwatch.Start();
var branchAndBoundResult = BranchAndBound.Solve(0, instance.Weights, instance.Prices, 0, 0, instance.MaxWeight, new int[instance.N + 1], new int[instance.N + 1]);
//BranchAndBound.Decide(0, instance.Weights, instance.Prices, 0, 0, instance.MaxWeight, 324);
stopwatch.Stop();
CheckResult(instance, branchAndBoundResult[instance.N], optimalResult, dataSet.Name, nameof(BranchAndBound));
branchAndBoundTimeAvg += stopwatch.Elapsed.TotalMilliseconds;
stopwatch.Reset();
// Start Dynamic programming
stopwatch.Start();
var dynamicProgrammingResult = DynamicProgramming.Solve(instance.Items, instance.MaxWeight);
stopwatch.Stop();
CheckResult(instance, dynamicProgrammingResult[instance.N], optimalResult, dataSet.Name, nameof(DynamicProgramming));
dynamicProgrammingAvg += stopwatch.Elapsed.TotalMilliseconds;
stopwatch.Reset();
// Start Greedy heuristic
stopwatch.Start();
greedyHeuristicResult = GreedyHeuristic.Solve(instance.Items.ToList(), instance.MaxWeight);
stopwatch.Stop();
//CheckResult(instance, greedyHeuristicResult[instance.N], optimalPrice, dataSet.Name, nameof(GreedyHeuristic));
greedyAvg += stopwatch.Elapsed.TotalMilliseconds;
stopwatch.Reset();
// Start Redux heuristic
stopwatch.Start();
reduxHeuristicResult = ReduxHeuristic.Solve(instance.Items.ToList(), instance.MaxWeight);
stopwatch.Stop();
reduxAvg += stopwatch.Elapsed.TotalMilliseconds;
stopwatch.Reset();
}
BFTotal += Avg(bruteForceTimeAvg, measurementCount);
BandBTotal += Avg(branchAndBoundTimeAvg, measurementCount);
dpTotal += Avg(dynamicProgrammingAvg, measurementCount);
greedyTotal += Avg(greedyAvg, measurementCount);
reduxTotal += Avg(reduxAvg, measurementCount);
csvBuilder.AppendLine(TestResultHelper.FormatInstanceResultRow(
instance.Id,
instance.N,
Avg(bruteForceTimeAvg, measurementCount),
Avg(branchAndBoundTimeAvg, measurementCount),
Avg(dynamicProgrammingAvg, measurementCount),
Avg(greedyAvg, measurementCount),
Avg(reduxAvg, measurementCount),
0
));
}
Console.WriteLine("{0}: calculating dataset {1} ended", DateTime.Now, dataSet.GetFilePath());
return(new TestResult
{
InstanceSize = dataSet.InstanceItemsCount,
InstancesResults = csvBuilder.ToString(),
BFTime = Avg(BFTotal, dataSet.InstancesCount),
BandBTime = Avg(BandBTotal, dataSet.InstancesCount),
GreedyHeuristicTime = Avg(greedyTotal, dataSet.InstancesCount),
ReduxHeuristicTime = Avg(reduxTotal, dataSet.InstancesCount),
DPTime = Avg(dpTotal, dataSet.InstancesCount),
FTPASTime = Avg(ftpasTotal, dataSet.InstancesCount),
GreedyRelErr = Avg(greedyErrSum, dataSet.InstancesCount),
GreedyMaxErr = greedyMaxErr,
ReduxRelErr = Avg(reduxErrSum, dataSet.InstancesCount),
ReduxMaxErr = reduxMaxErr
});
}
static void Main(string[] args)
{
Logger.WriteLine("String Pattern Matching");
// Variable to hold whether or not to continue the program after each termination
string keepPlaying;
// Loop while the user wants to continue
do
{
// Get user input of text, pattern, and which algorithm to run
var(text, pattern, algorithm) = GetUserInput();
// Run one algorithm if user did not specify to run all
if (algorithm != "all" && algorithm != "ALL")
{
// Get the index and comparisons based on which algorithm the user chose
var(index, comparisons) = algorithm switch
{
var x when x == "BF" || x == "bf" => BruteForce.Run(text, pattern),
var y when y == "BMH" || y == "bmh" => BMH.Run(text, pattern),
var z when z == "BM" || z == "bm" => BM.Run(text, pattern),
_ => throw new Exception("Invalid algorithm string"),
};
// If the pattern was not found
if (index == -1)
{
Logger.Write("\nPattern was not found in the given text. ");
}
// Else the pattern was found
else
{
Logger.Write($"\nPattern was found at index {index}. ");
}
Logger.WriteLine($"There were {comparisons} comparisons made.");
}
else
{
// Get the index and comparisons from all algorithms
var(indexBF, comparisonsBF) = BruteForce.Run(text, pattern);
var(indexBMH, comparisonsBMH) = BMH.Run(text, pattern);
var(indexBM, comparisonsBM) = BM.Run(text, pattern);
// All algorithms should return the same index so we only need to use indexBF
// If pattern was not found
if (indexBF == -1)
{
Logger.WriteLine("\nPattern was not found in the given text. ");
}
// Else pattern was found
else
{
Logger.WriteLine($"\nPattern was found at index {indexBF}. ");
}
Logger.WriteLine($"There were {comparisonsBF} comparisons made by the Brute Force Algorithm.");
Logger.WriteLine($"There were {comparisonsBMH} comparisons made by the Boyer-Moore-Horspool Algorithm.");
Logger.WriteLine($"There were {comparisonsBM} comparisons made by the Boyer-Moore Algorithm.");
}
// Loop until valid input of y/n
do
{
Logger.WriteLine("\nWould you like to repeat program? y/n ");
keepPlaying = Logger.ReadLine();
}while (keepPlaying != "y" && keepPlaying != "Y" && keepPlaying != "n" && keepPlaying != "N");
Logger.WriteLine();
}while (keepPlaying == "y" || keepPlaying == "Y");
Logger.LogToFile();
Console.WriteLine("\nLog outputted to logs/ directory.");
Console.WriteLine("\nPress enter to exit...");
Console.ReadLine();
}
/**
* Frecuency of occurrence of an itemset: Counts in how many transactions a given itemset occurs.
* itemset : Array of codes of a itemset.
**/
public int SupportCount(int[] itemset)
{
List <List <int> > dataBase = context.Transactions.Select(t => t.Value.Items).ToList();
return(BruteForce.SupportCount(itemset, dataBase));
}