static void Main11(string[] args)
{
string inputProgram = File.ReadAllText(@".\Day11\input.txt");
long[] instructionSet = inputProgram.Trim('\n').Split(',').Select((instr) => Int64.Parse(instr)).ToArray();
LargeMemSet memSet = new LargeMemSet(instructionSet);
PaintBot pb = new PaintBot();
ComputeIntCode(memSet, pb);
Console.WriteLine(pb.TotalPanelsPainted);
pb.printPainting();
}
private static void ComputeIntCode(LargeMemSet instructionSet, PaintBot bot)
{
long activeInstruction = 0;
long relativeBase = 0;
bool givenPaintInstr = false;
while (instructionSet[activeInstruction] != 99)
{
long instruction = instructionSet[activeInstruction];
// opcode is right most two digits
long opcode = instruction % 100;
long firstMode = (instruction / 100) % 10;
long secondMode = (instruction / 1000) % 10;
long thirdMode = (instruction / 10000) % 10;
long firstParamValue = 0;
long firstParamIndex = 0;
long secondParamValue = 0;
long thirdParamIndex = 0;
long[] opcodesNeedingFirstParam = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
long[] opcodesNeedingSecondParam = { 1, 2, 5, 6, 7, 8 };
long[] opcodesNeedingThirdParam = { 1, 2, 7, 8 };
if (opcodesNeedingFirstParam.Contains(opcode))
{
switch (firstMode)
{
// Position
case 0:
firstParamIndex = instructionSet[activeInstruction + 1];
break;
// Immediate
case 1:
firstParamIndex = activeInstruction + 1;
break;
// Relative
case 2:
firstParamIndex = instructionSet[activeInstruction + 1] + relativeBase;
break;
}
firstParamValue = instructionSet[firstParamIndex];
}
if (opcodesNeedingSecondParam.Contains(opcode))
{
switch (secondMode)
{
case 0:
secondParamValue = instructionSet[instructionSet[activeInstruction + 2]];
break;
case 1:
secondParamValue = instructionSet[activeInstruction + 2];
break;
case 2:
secondParamValue = instructionSet[instructionSet[activeInstruction + 2] + relativeBase];
break;
}
}
if (opcodesNeedingThirdParam.Contains(opcode))
{
switch (thirdMode)
{
case 0:
thirdParamIndex = instructionSet[activeInstruction + 3];
break;
case 1:
throw new Exception("Cannot store at immediate position");
case 2:
thirdParamIndex = instructionSet[activeInstruction + 3] + relativeBase;
break;
}
}
switch (opcode)
{
// add
case 1:
instructionSet[thirdParamIndex] =
firstParamValue + secondParamValue;
activeInstruction += 4;
break;
case 2:
instructionSet[thirdParamIndex] =
firstParamValue * secondParamValue;
activeInstruction += 4;
break;
case 3:
instructionSet[firstParamIndex] = bot.getCameraReading();
activeInstruction += 2;
break;
case 4:
if (!givenPaintInstr)
{
bot.paint((int)firstParamValue);
givenPaintInstr = true;
}
else
{
bot.changeDirectionAndMove((int)firstParamValue);
givenPaintInstr = false;
}
activeInstruction += 2;
break;
case 5:
if (firstParamValue != 0)
{
activeInstruction = secondParamValue;
}
else
{
activeInstruction += 3;
}
break;
case 6:
if (firstParamValue == 0)
{
activeInstruction = secondParamValue;
}
else
{
activeInstruction += 3;
}
break;
case 7:
if (firstParamValue < secondParamValue)
{
instructionSet[thirdParamIndex] = 1;
}
else
{
instructionSet[thirdParamIndex] = 0;
}
activeInstruction += 4;
break;
case 8:
if (firstParamValue == secondParamValue)
{
instructionSet[thirdParamIndex] = 1;
}
else
{
instructionSet[thirdParamIndex] = 0;
}
activeInstruction += 4;
break;
case 9:
relativeBase += firstParamValue;
activeInstruction += 2;
break;
default:
throw new Exception($"Unexpected opcode {instructionSet[activeInstruction]}");
}
}
}
