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refactor(*): Update 2021-16 part 1 files not working

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Josh Creek
2021-12-16 18:28:43 +00:00
parent bef3eb551b
commit 3b3a25b9cd
1 changed files with 65 additions and 25 deletions
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2021/16/Program.cs
+65 -25
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@@ -17,26 +17,41 @@ namespace Day16
static void Part1(string[] lines)
{
string hex = lines[0];
string binary = Convert.ToString(Convert.ToInt32(hex, 16), 2);
Queue<int> bitQueue = new Queue<int>();
for (int i = 0; i < hex.Length; i++)
{
// Convert each hex character into binary
string currentHexCharacter = Convert.ToString(Convert.ToInt32(hex[i].ToString(), 16), 2);
// Store each bit into the list
for (int j = 0; j < currentHexCharacter.Length; j++)
{
bitQueue.Enqueue(int.Parse(currentHexCharacter[j].ToString()));
}
}
List<int> versionNumbers = new List<int>();
List<int> outputList = new List<int>();
HandlePacket(ref versionNumbers, ref outputList, binary);
HandlePacket(ref versionNumbers, ref outputList, bitQueue);
foreach (var item in versionNumbers)
{
Console.WriteLine(item);
}
int total = versionNumbers.Sum(x => x);
Console.WriteLine($"The sum of version numbers in all packets is: {total}");
}
static void HandlePacket(ref List<int> versionNumbers, ref List<int> outputList, string binary)
static void HandlePacket(ref List<int> versionNumbers, ref List<int> outputList, Queue<int> bitQueue)
{
int packetVersion = Convert.ToInt32(binary.Substring(0, 3), 2);
int packetVersion = Convert.ToInt32($"{bitQueue.Dequeue()}{bitQueue.Dequeue()}{bitQueue.Dequeue()}", 2);
versionNumbers.Add(packetVersion);
int typeId = Convert.ToInt32(binary.Substring(3, 3), 2);
string remainingBinary = binary.Substring(6, binary.Length - 6);
int typeId = Convert.ToInt32($"{bitQueue.Dequeue()}{bitQueue.Dequeue()}{bitQueue.Dequeue()}", 2);
if (typeId == 4)
{
@@ -48,17 +63,18 @@ namespace Day16
* group, which is prefixed by a 0 bit. These groups of five bits immediately follow the packet header.
*/
StringBuilder binaryLiteral = new StringBuilder();
string unprocessedBinary = string.Empty;
bool isEndOfPacket = false;
for (int i = 0; i < remainingBinary.Length; i += 5)
while (!isEndOfPacket)
{
binaryLiteral.Append(remainingBinary.Substring(i + 1, 4));
int endOfPacketIdentifier = bitQueue.Dequeue();
if (remainingBinary[i] == '0')
binaryLiteral.Append($"{bitQueue.Dequeue()}{bitQueue.Dequeue()}{bitQueue.Dequeue()}{bitQueue.Dequeue()}");
if (endOfPacketIdentifier == 0)
{
// last group, end of packet
unprocessedBinary = remainingBinary.Substring(i + 5, remainingBinary.Length - i);
break;
isEndOfPacket = true;
}
}
@@ -68,39 +84,63 @@ namespace Day16
outputList.Add(output);
// if the unprocessed binary doesn't just contain zeros process it again
if (!Regex.IsMatch(unprocessedBinary, @"^(0+)$"))
if (bitQueue.Count >= 11 && bitQueue.Any(b => (b != 0)))
{
HandlePacket(ref versionNumbers, ref outputList, unprocessedBinary);
HandlePacket(ref versionNumbers, ref outputList, bitQueue);
}
}
else
{
// Packets represent an operator
char lengthTypeId = remainingBinary[0];
int lengthTypeId = bitQueue.Dequeue();
if (lengthTypeId == '0')
if (lengthTypeId == 0)
{
// the next _15_ bits are a number that represents the _total length in bits_ of the
// sub-packets contained by this packet.
int totalLengthInBitsOfSubPacketsContainedByThisPacket = Convert.ToInt32(remainingBinary.Substring(1, 15), 2);
StringBuilder sb = new StringBuilder();
string binaryToStillProcess = remainingBinary.Substring(16, totalLengthInBitsOfSubPacketsContainedByThisPacket);
for (int i = 0; i < 15 && bitQueue.Count > 0; i++)
{
sb.Append(bitQueue.Dequeue());
}
HandlePacket(ref versionNumbers, ref outputList, binaryToStillProcess);
int totalLengthInBitsOfSubPacketsContainedByThisPacket = Convert.ToInt32(sb.ToString(), 2);
Queue<int> newBitQueue = new Queue<int>();
for (int i = 0; i < totalLengthInBitsOfSubPacketsContainedByThisPacket && bitQueue.Count > 0; i++)
{
newBitQueue.Enqueue(bitQueue.Dequeue());
}
if (bitQueue.Count >= 11)
{
HandlePacket(ref versionNumbers, ref outputList, newBitQueue);
}
}
else if (lengthTypeId == '1')
else if (lengthTypeId == 1)
{
// the next _11_ bits are a number that represents the _number of sub-packets
// immediately contained_ by this packet.
int numberOfSubPacketsImmediatelyContainedByThisPacket = Convert.ToInt32(remainingBinary.Substring(1, 11), 2);
StringBuilder sb = new StringBuilder();
for (int i = 0; i < 11 && bitQueue.Count > 0; i++)
{
sb.Append(bitQueue.Dequeue());
}
int numberOfSubPacketsImmediatelyContainedByThisPacket = Convert.ToInt32(sb.ToString(), 2);
// TODO - I can't see how I can even use this information
string binaryToStillProcess = remainingBinary.Substring(16, remainingBinary.Length - 16);
HandlePacket(ref versionNumbers, ref outputList, binaryToStillProcess);
if (bitQueue.Count >= 11)
{
HandlePacket(ref versionNumbers, ref outputList, bitQueue);
}
}
}
}