static void Main(string[] args)
{
const int minArraySize = 3;
const int maxArraySize = 4;
const int setCount = 10;
const bool generateRandomInput = true;
var trie = new Trie(File.ReadAllLines("sowpods.txt"));
var watch = new Stopwatch();
var trials = 10000;
var wordCountSum = 0;
var rand = new Random(37);
for (int t = 0; t < trials; t++)
{
HashSet<Letter>[] sets;
if (generateRandomInput)
{
sets = new HashSet<Letter>[setCount];
for (int i = 0; i < setCount; i++)
{
sets[i] = new HashSet<Letter>();
var size = minArraySize + rand.Next(maxArraySize - minArraySize + 1);
while (sets[i].Count < size)
{
sets[i].Add(Letter.Chars[rand.Next(Letter.Chars.Length)]);
}
}
}
else
{
sets = new HashSet<Letter>[] {
new HashSet<Letter>(new Letter[] { 'P', 'Q', 'R', 'S' }),
new HashSet<Letter>(new Letter[] { 'A', 'B', 'C' }),
new HashSet<Letter>(new Letter[] { 'T', 'U', 'V' }),
new HashSet<Letter>(new Letter[] { 'M', 'N', 'O' }) };
}
watch.Start();
var wordsFound = new List<string>();
for (int i = 0; i < sets.Length - 1; i++)
{
GenWords(trie.Root, sets, i, wordsFound);
}
watch.Stop();
wordCountSum += wordsFound.Count;
if (!generateRandomInput && t == 0)
{
foreach (var word in wordsFound)
{
Console.WriteLine(word);
}
}
}
Console.WriteLine("Elapsed per trial = {0}", new TimeSpan(watch.Elapsed.Ticks / trials));
Console.WriteLine("Average word count per trial = {0:0.0}", (float)wordCountSum / trials);
}
static void GenWords(Trie.Node n, HashSet<Letter>[] sets, int currentArrayIndex, List<string> wordsFound)
{
if (currentArrayIndex < sets.Length)
{
foreach (var edge in n.Edges)
{
if (sets[currentArrayIndex].Contains(edge.Key))
{
if (edge.Value.IsTerminal)
{
wordsFound.Add(edge.Value.Word);
}
GenWords(edge.Value, sets, currentArrayIndex + 1, wordsFound);
}
}
}
}