static void UpdateStore(List <Reaction> reactions, Chemical c, long unitToProduce, Dictionary <string, long> store)
{
var reaction = reactions.Single(r1 => r1.Right.Label == c.Label);
var needed = unitToProduce;
var count = 0;
if (needed > 0)
{
do
{
count++;
}while (count * reaction.Right.Quantity < needed);
}
var produced = count * reaction.Right.Quantity;
var toAdd = produced - needed;
if (toAdd > 0)
{
if (store.ContainsKey(c.Label))
{
store[c.Label] += (long)toAdd;
}
else
{
store[c.Label] = (long)toAdd;
}
}
}
static void Part1()
{
var reactions = Parse(File.ReadAllLines("./Input.txt"));
var goal = new Chemical {
Quantity = 1, Label = "FUEL"
};
var store = new Dictionary <string, long>();
var oreRequired = Produce(reactions, goal, store, 0);
Debug.Assert(oreRequired == 365768);
}
private void LoadData()
{
string inputFile = AppDomain.CurrentDomain.BaseDirectory + @"..\..\input.txt";
if (File.Exists(inputFile))
{
string line;
StreamReader file = new StreamReader(inputFile);
while ((line = file.ReadLine()) != null)
{
Chemical chemical = ParseChemical(line);
ChemicalMap[chemical.Name] = chemical;
}
file.Close();
}
}
private Chemical ParseChemical(string str)
{
int index = str.IndexOf("=>");
int required;
string name;
ParseQuantityAndName(str.Substring(index + 3), out name, out required);
Chemical chemical = new Chemical(name, required);
str = str.Substring(0, index - 1);
string[] pairs = str.Split(',');
foreach (string pair in pairs)
{
ParseQuantityAndName(pair, out name, out required);
Ingredient ingredient = new Ingredient(name, required);
chemical.AddIngredient(ingredient);
}
return(chemical);
}
static long Produce(List <Reaction> reactions, Chemical goal, Dictionary <string, long> store, int level)
{
var reaction = reactions.Single(r => r.Right.Label == goal.Label);
var multiple = (long)Math.Ceiling((double)goal.Quantity / reaction.Right.Quantity);
// Base
if (reaction.Left.Length == 1 && reaction.Left[0].Label == "ORE")
{
//Console.WriteLine($"{new string(' ', level)}{goal.Quantity} {goal.Label} <= {reaction.Left[0].Quantity} {reaction.Left[0].Label} ({multiple}x)");
return(reaction.Left[0].Quantity * multiple);
}
// Induction
var ore = 0L;
foreach (var r in reaction.Left)
{
//Console.WriteLine($"{new string(' ', level)}{goal.Quantity} {goal.Label} <= {r.Quantity} {r.Label} ({multiple}x)");
var toProduce = r.Quantity * multiple;
if (store.ContainsKey(r.Label) && store[r.Label] > 0)
{
var x = Math.Min(store[r.Label], toProduce);
toProduce -= x;
store[r.Label] -= x;
}
ore += Produce(reactions, new Chemical {
Quantity = toProduce, Label = r.Label
}, store, level + 2);
UpdateStore(reactions, r, toProduce, store);
}
// foreach (var s in store)
// Console.WriteLine($"{new string(' ', level)}Store: {s.Key} {s.Value}");
return(ore);
}
static void Test()
{
// Part 1
{
var s = new string[]
{
"10 ORE => 10 A",
"1 ORE => 1 B",
"7 A, 1 B => 1 C",
"7 A, 1 C => 1 D",
"7 A, 1 D => 1 E",
"7 A, 1 E => 1 FUEL"
};
var reactions = Parse(s);
var goal = new Chemical {
Quantity = 1, Label = "FUEL"
};
var store = new Dictionary <string, long>();
var oreRequired = Produce(reactions, goal, store, 0);
Debug.Assert(oreRequired == 31);
Debug.Assert(store.Count == 1 && store["A"] == 2);
}
{
var s = new string[]
{
"9 ORE => 2 A",
"8 ORE => 3 B",
"7 ORE => 5 C",
"3 A, 4 B => 1 AB",
"5 B, 7 C => 1 BC",
"4 C, 1 A => 1 CA",
"2 AB, 3 BC, 4 CA => 1 FUEL"
};
var reactions = Parse(s);
var goal = new Chemical {
Quantity = 1, Label = "FUEL"
};
var store = new Dictionary <string, long>();
var oreRequired = Produce(reactions, goal, store, 0);
Debug.Assert(oreRequired == 165);
Debug.Assert(store.Count == 2 && store["B"] == 1 && store["C"] == 3);
}
{
var s = new string[]
{
"157 ORE => 5 NZVS",
"165 ORE => 6 DCFZ",
"44 XJWVT, 5 KHKGT, 1 QDVJ, 29 NZVS, 9 GPVTF, 48 HKGWZ => 1 FUEL",
"12 HKGWZ, 1 GPVTF, 8 PSHF => 9 QDVJ",
"179 ORE => 7 PSHF",
"177 ORE => 5 HKGWZ",
"7 DCFZ, 7 PSHF => 2 XJWVT",
"165 ORE => 2 GPVTF",
"3 DCFZ, 7 NZVS, 5 HKGWZ, 10 PSHF => 8 KHKGT"
};
var reactions = Parse(s);
var goal = new Chemical {
Quantity = 1, Label = "FUEL"
};
var store = new Dictionary <string, long>();
var oreRequired = Produce(reactions, goal, store, 0);
Debug.Assert(oreRequired == 13312);
}
{
var s = new string[]
{
"2 VPVL, 7 FWMGM, 2 CXFTF, 11 MNCFX => 1 STKFG",
"17 NVRVD, 3 JNWZP => 8 VPVL",
"53 STKFG, 6 MNCFX, 46 VJHF, 81 HVMC, 68 CXFTF, 25 GNMV => 1 FUEL",
"22 VJHF, 37 MNCFX => 5 FWMGM",
"139 ORE => 4 NVRVD",
"144 ORE => 7 JNWZP",
"5 MNCFX, 7 RFSQX, 2 FWMGM, 2 VPVL, 19 CXFTF => 3 HVMC",
"5 VJHF, 7 MNCFX, 9 VPVL, 37 CXFTF => 6 GNMV",
"145 ORE => 6 MNCFX",
"1 NVRVD => 8 CXFTF",
"1 VJHF, 6 MNCFX => 4 RFSQX",
"176 ORE => 6 VJHF"
};
var reactions = Parse(s);
var goal = new Chemical {
Quantity = 1, Label = "FUEL"
};
var store = new Dictionary <string, long>();
var oreRequired = Produce(reactions, goal, store, 0);
Debug.Assert(oreRequired == 180697);
}
{
var s = new string[]
{
"171 ORE => 8 CNZTR",
"7 ZLQW, 3 BMBT, 9 XCVML, 26 XMNCP, 1 WPTQ, 2 MZWV, 1 RJRHP => 4 PLWSL",
"114 ORE => 4 BHXH",
"14 VRPVC => 6 BMBT",
"6 BHXH, 18 KTJDG, 12 WPTQ, 7 PLWSL, 31 FHTLT, 37 ZDVW => 1 FUEL",
"6 WPTQ, 2 BMBT, 8 ZLQW, 18 KTJDG, 1 XMNCP, 6 MZWV, 1 RJRHP => 6 FHTLT",
"15 XDBXC, 2 LTCX, 1 VRPVC => 6 ZLQW",
"13 WPTQ, 10 LTCX, 3 RJRHP, 14 XMNCP, 2 MZWV, 1 ZLQW => 1 ZDVW",
"5 BMBT => 4 WPTQ",
"189 ORE => 9 KTJDG",
"1 MZWV, 17 XDBXC, 3 XCVML => 2 XMNCP",
"12 VRPVC, 27 CNZTR => 2 XDBXC",
"15 KTJDG, 12 BHXH => 5 XCVML",
"3 BHXH, 2 VRPVC => 7 MZWV",
"121 ORE => 7 VRPVC",
"7 XCVML => 6 RJRHP",
"5 BHXH, 4 VRPVC => 5 LTCX"
};
var reactions = Parse(s);
var goal = new Chemical {
Quantity = 1, Label = "FUEL"
};
var store = new Dictionary <string, long>();
var oreRequired = Produce(reactions, goal, store, 0);
Debug.Assert(oreRequired == 2210736);
}
}
public Reaction(IList <Chemical> input, Chemical output)
{
Output = output;
Input = input;
}
