Add extremely broken day14pt2

I'm sorry I just gave up

diff --git a/src/adventofcode2019/day14.clj b/src/adventofcode2019/day14.clj
index e2aae3e11000ebd9e14f8920caec7d10234c9fea..8310b5eace0ea3e0188d37a99df694ca679045c5 100644 (file)
--- a/src/adventofcode2019/day14.clj
+++ b/src/adventofcode2019/day14.clj
@@ -16,10 +16,11 @@
           (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)
@@ -27,7 +28,7 @@
                                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])]
@@ -39,7 +40,31 @@
   (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))))

diff --git a/test/adventofcode2019/day14_test.clj b/test/adventofcode2019/day14_test.clj
index 7e99dcc401bbcd131861ed0ca6a6704ae8ceb18e..c791164b70ce8a131a2fce86dc0cc0e8954c86af 100644 (file)
--- a/test/adventofcode2019/day14_test.clj
+++ b/test/adventofcode2019/day14_test.clj
@@ -23,12 +23,9 @@
           "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"
@@ -85,3 +82,46 @@
                                                          "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))))