| 1 | (ns adventofcode2019.day11 |
| 2 | [:require [adventofcode2019.lib :refer :all] |
| 3 | [adventofcode2019.intcode :as i] |
| 4 | [clojure.string :as str] |
| 5 | [clojure.core.match :refer [match]]]) |
| 6 | |
| 7 | (defn painterbot-9000 [program] |
| 8 | (let [stop-on-output #(= (count (:output %)) 2) |
| 9 | get-next-ic-output (partial i/intcode-until stop-on-output) |
| 10 | rotate (fn [heading turning] |
| 11 | (match [heading turning] |
| 12 | [:up 0] :left |
| 13 | [:down 0] :right |
| 14 | [:left 0] :down |
| 15 | [:right 0] :up |
| 16 | [:up 1] :right |
| 17 | [:down 1] :left |
| 18 | [:left 1] :down |
| 19 | [:right 1] :up)) |
| 20 | travel (fn [[x y] heading] |
| 21 | (case heading |
| 22 | :up [x (inc y)] |
| 23 | :down [x (dec y)] |
| 24 | :left [(dec x) y] |
| 25 | :right [(inc x) y]))] |
| 26 | (loop [program-state (i/build-state program {:input [0]}) |
| 27 | tileset {} |
| 28 | position [0 0] |
| 29 | heading :up] |
| 30 | (if (:exit program-state) |
| 31 | tileset |
| 32 | (let [next-state (get-next-ic-output program-state) |
| 33 | [color direction] (:output next-state) |
| 34 | new-heading (rotate heading direction)] |
| 35 | (recur (assoc next-state :output []) (assoc tileset position color) |
| 36 | (travel position new-heading) new-heading)))))) |
| 37 | |
| 38 | (defn day11 [] |
| 39 | (let [input (mapv parse-int (get-list-from-file (input-file) #",")) |
| 40 | painted-tiles (painterbot-9000 input)] |
| 41 | (part1 (count painted-tiles)) |
| 42 | #_(part2))) |