(map parse-reaction input)))
(defn reduce-reaction [graph producing consuming]
- (let [[inputs moles] (graph producing)
+ (let [consuming (into #{} (if (coll? consuming) consuming [consuming]))
+ [inputs moles] (graph producing)
in-chems (keys inputs)
replace-term (fn [chem]
- (if (or (= chem consuming)
+ (if (or (contains? consuming chem)
(neg? (second (graph chem))))
{chem (inputs chem)}
(let [ch-req (inputs chem)
conversion (int (Math/ceil (/ ch-req ch-mo)))]
(assoc (mmap (partial * conversion) ch-in)
chem (- ch-req (* ch-mo conversion))))))
- check-reduced (fn [[ch ct]] (and (not= ch consuming) (pos? ct)))
+ check-reduced (fn [[ch ct]] (and (not (contains? consuming ch)) (pos? ct)))
reduced-inputs (reduce (partial merge-with +)
(map replace-term in-chems))
new-graph (assoc graph producing [reduced-inputs moles])]
(get-in (reduce-reaction graph producing consuming)
[producing 0 consuming]))
+(defn produce-with [graph producing consuming cargo]
+ (println graph producing consuming cargo)
+ (let [cheapest-prod (get-in graph [producing 0])
+ exchange-rate (cheapest-prod consuming)
+ base-times (quot cargo exchange-rate)
+ extra-cargo (mod cargo exchange-rate)
+ extra-resources (assoc (->> cheapest-prod
+ (filter (comp neg? second))
+ (map (fn [[chem mole]]
+ [chem (* -1 base-times mole)]))
+ (into {})) consuming extra-cargo)
+ rewrite-with (into #{} (keys extra-resources))
+ second-chance (reduce-reaction graph producing rewrite-with)
+ recursive-times (map (fn [[chem ct]]
+ (let [er (- (get-in second-chance [producing 0 chem]))]
+ (println chem ct er)
+ (quot ct er)))
+ extra-resources)]
+ recursive-times))
+
+(defn maximize-output [graph producing consuming cargo]
+ (produce-with (reduce-reaction graph producing consuming)
+ producing consuming cargo))
+
(defn day14 []
(let [graphed (make-graph (get-list-from-file (input-file)))]
(part1 (find-lowest-exchange-rate graphed "FUEL" "ORE"))
- #_(part2)))
+ (part2 (maximize-output graphed "FUEL" "ORE" 1000000000000))))
"AB" [{"A" 3, "B" 4} 1]
"BC" [{"B" 5, "C" 7} 1]
"CA" [{"C" 4, "A" 1} 1]
- "FUEL" [{"ORE" 165, "A" 0
- "B" -1, "AB" 0
- "C" -3, "BC" 0
- "CA" 0} 1]})))
+ "FUEL" [{"ORE" 165, "A" 0 "B" -1, "AB" 0 "C" -3, "BC" 0 "CA" 0} 1]})))
-(deftest examples
+(deftest examples-part1
(is (= 31 (find-lowest-exchange-rate (make-graph ["10 ORE => 10 A"
"1 ORE => 1 B"
"7 A, 1 B => 1 C"
"7 XCVML => 6 RJRHP"
"5 BHXH, 4 VRPVC => 5 LTCX"])
"FUEL", "ORE"))))
+
+(deftest examples-part2
+ (is (= 82892753 (maximize-output (make-graph ["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"])
+ "FUEL" "ORE" 1000000000000)))
+ (is (= 5586022 (maximize-output (make-graph ["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"])
+ "FUEL", "ORE" 1000000000000)))
+ (is (= 460664 (maximize-output (make-graph ["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"])
+ "FUEL" "ORE" 1000000000000))))
projects / adventofcode2019.git / commitdiff