public void RecordHistory(string text, bool isInPrivate)
{
if (!isInPrivate)
{
var record = new Spoken {
UtcNowTicks = DateTime.UtcNow.Ticks, TickCount = Environment.TickCount, IsInPrivate = isInPrivate, Text = text
};
XmlFragmentHelper.WriteLog(HistoryFilePath, record);
}
}
private void UpdateSpoken()
{
if (Speaking != null)
{
Spoken.Add(Speaking);
}
Speaking = null;
lblCurrentSpeaker.Text = Translations.NobodySpeaking;
SetLabelWithTooltip(lblSpoken, Translations.PeopleThatHaveSpoken, Spoken);
}
private static int Solution(string[] input, int noOfIterations)
{
string[] inputs = input[0].Split(",");
int newLastNo;
Dictionary <int, Spoken> gamePlay = new();
Spoken lastGo = new(0, 0, false);
for (int turnNo = 1; turnNo <= inputs.Length; turnNo++)
{
lastGo = new Spoken(int.Parse(inputs[turnNo - 1]), turnNo, true);
gamePlay.Add(lastGo.No, lastGo);
}
for (int turnNo = inputs.Length + 1; turnNo <= noOfIterations; turnNo++)
{
if (lastGo.FirstTime)
{
newLastNo = 0;
gamePlay[lastGo.No] = lastGo with {
FirstTime = false
};
}
else
{
newLastNo = turnNo - 1 - gamePlay[lastGo.No].TurnNo;
gamePlay[lastGo.No] = lastGo with {
TurnNo = turnNo - 1
};
}
lastGo = new(newLastNo, turnNo, !gamePlay.ContainsKey(newLastNo));
}
return(lastGo.No);
}
}
static void ProcessText(TextReader reader)
{
ReadToFirstChapterHeader(reader);
var endOfText = false;
var paragraph = new StringBuilder();
var blankCount = 0;
for (var line = reader.ReadLine(); !endOfText && line != null; line = reader.ReadLine())
{
if (string.IsNullOrWhiteSpace(line))
{
if (paragraph.Length != 0)
{
var text = paragraph.ToString();
for (var startReference = text.IndexOf('*'); 0 <= startReference; startReference = text.IndexOf('*'))
{
var endReference = startReference;
do
{
endReference++;
}while (endReference < text.Length && text[endReference - 1] != ' ');
Console.WriteLine(text.Substring(startReference, endReference - startReference));
Console.WriteLine(" " + text.Substring(startReference));
text = text.Substring(0, startReference) + text.Substring(endReference);
}
var record = new Spoken {
UtcNowTicks = DateTime.UtcNow.Ticks, TickCount = Environment.TickCount, Text = text
};
records.Add(record);
paragraph.Clear();
}
blankCount++;
}
else
{
switch (blankCount)
{
case 0:
if (paragraph.Length != 0)
{
paragraph.Append(' ');
}
paragraph.Append(line);
break;
case 1:
if (line.StartsWith("*"))
{
Debug.Assert(true);
}
else if (line.StartsWith("BOOK"))
{
Debug.Assert(true);
}
else
{
Debug.Assert(paragraph.Length == 0);
paragraph.Append(line);
}
break;
case 2:
if (line.StartsWith("*"))
{
Debug.Assert(true);
}
else
{
Debug.Assert(paragraph.Length == 0);
paragraph.Append(line);
}
break;
case 4:
Debug.Assert(line.StartsWith("CHAPTER"));
break;
case 5:
endOfText = true;
break;
default:
Debug.Assert(false);
break;
}
blankCount = 0;
}
}
}
public static void Day15()
{
Console.WriteLine("Day15: ");
var input = File.ReadAllText("Aoc2020\\Day15\\test.txt").Split(',').Select(int.Parse).ToArray();
// part 1
int lastNum = PlaySpokenGame2(2020);
Console.WriteLine(lastNum);
// part 2
Stopwatch sw = Stopwatch.StartNew();
lastNum = PlaySpokenGame2(30000000);
sw.Stop();
Console.WriteLine($"{lastNum} in {sw.ElapsedMilliseconds}ms");
int PlaySpokenGame(int rounds)
{
Spoken[] lastSpoken = new Spoken[rounds];
int i, lastNum = -1;
for (i = 0; i < input.Length; i++)
{
lastNum = input[i];
lastSpoken[lastNum].time = i + 1;
}
for (; i < rounds; i++)
{
if (lastSpoken[lastNum].time == 0)
{
lastNum = input[i % input.Length];
}
else
{
if (lastSpoken[lastNum].prev_time == 0)
{
lastNum = 0;
}
else
{
lastNum = lastSpoken[lastNum].time - lastSpoken[lastNum].prev_time;
}
}
lastSpoken[lastNum].prev_time = lastSpoken[lastNum].time;
lastSpoken[lastNum].time = i + 1;
}
return(lastNum);
}
int PlaySpokenGame2(int rounds)
{
int[] lastSpoken = new int[rounds];
int i, prev = -1, next = -1;
for (i = 0; i < input.Length; i++)
{
prev = input[i];
lastSpoken[prev] = i + 1;
}
next = 0;
for (; i < rounds; i++)
{
if (lastSpoken[prev] == 0)
{
next = 0;
}
else
{
next = i + 1 - lastSpoken[prev];
lastSpoken[prev] = i + 1;
}
}
return(next);
}
}
