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53 lines
1.5 KiB
53 lines
1.5 KiB
5 years ago
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recipes = {}
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for line in io.lines(arg[1]) do
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input, output = line:match("(.-) *=> *(.+)")
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quant, name = output:match("(%d+) +(.+)")
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recipe = {quant=tonumber(quant), ingres={}}
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for quant, ingre in input:gmatch("(%d+) +(%a+),? *") do
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recipe.ingres[ingre] = quant
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end
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recipes[name] = recipe
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end
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recipes.ORE = {quant=0, ingres={}}
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function get_ore(fuel)
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local wanted = {FUEL=fuel}
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while true do
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for name, _ in pairs(wanted) do
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if name ~= "ORE" then
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recipe = recipes[name]
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if wanted[name] > 0 then
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amount = wanted[name] // recipe.quant
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if wanted[name] % recipe.quant > 0 then
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amount = amount + 1
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end
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for ingre, ingre_quant in pairs(recipe.ingres) do
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if not wanted[ingre] then
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wanted[ingre] = 0
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end
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wanted[ingre] = wanted[ingre] + ingre_quant * amount
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end
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wanted[name] = wanted[name] - recipe.quant * amount
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end
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end
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end
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if wanted["ORE"] then
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count = 0
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for x, y in pairs(wanted) do if 0 < y then count = count + 1 end end
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if count == 1 then
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return wanted["ORE"]
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end
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end
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end
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end
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-- Manual brute forcing is actually doable, funnily enough
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ore = get_ore(tonumber(arg[2]))
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print(ore)
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if ore > 1000000000000 then
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print("Ding!")
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end
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