public long Part1()
{
var input = InputUtils.GetDayInputLines(14);
Nanofactory r = new Nanofactory(input);
r.RunFactory(new InputOutputChemical {
Amount = 1, Chemical = "FUEL"
});
return(r.OreCount);
}
public long Part2()
{
var input = InputUtils.GetDayInputLines(14);
// a trillion ore
const long oreStorage = 1_000_000_000_000;
Nanofactory r = new Nanofactory(input);
long fuelCount = 0;
// produce lots at a time
int fuelToProduce = 1000;
Dictionary <string, int> tempExtra = null;
long tempOreCount = 0;
while (fuelToProduce >= 1)
{
while (r.OreCount < oreStorage)
{
tempExtra = new Dictionary <string, int>(r.ExtraMaterials);
tempOreCount = r.OreCount;
r.RunFactory(new InputOutputChemical()
{
Amount = fuelToProduce, Chemical = "FUEL"
});
fuelCount += fuelToProduce;
}
// it wasn't an exact match, scale back and rerun
// the reactions to produce less fuel
if (fuelToProduce >= 1)
{
r.ExtraMaterials = new Dictionary <string, int>(tempExtra);
r.OreCount = tempOreCount;
fuelCount -= fuelToProduce;
fuelToProduce /= 10;
}
}
return(fuelCount);
}