You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
|
|
; Day 2, part 2
|
|
|
|
|
; Read a list of instructions from stdin:
|
|
|
|
|
; "down X" increases aim number by X,
|
|
|
|
|
; "up X" decreases aim by X,
|
|
|
|
|
; "forward X" increases xpos by X and depth by (aim * X).
|
|
|
|
|
; Print (xpos * depth) after end of data.
|
|
|
|
|
;
|
|
|
|
|
|
|
|
|
|
(require '[clojure.string :as str])
|
|
|
|
|
|
|
|
|
|
(println
|
|
|
|
|
(apply *
|
|
|
|
|
(map
|
|
|
|
|
(reduce
|
|
|
|
|
#(case (first %2)
|
|
|
|
|
"forward" (-> %1 (update :xpos + (second %2))
|
|
|
|
|
(update :depth + (* (%1 :aim) (second %2))))
|
|
|
|
|
"up" (update %1 :aim - (second %2))
|
|
|
|
|
"down" (update %1 :aim + (second %2)))
|
|
|
|
|
{:xpos 0 :depth 0 :aim 0}
|
|
|
|
|
(->> (slurp "./in")
|
|
|
|
|
str/split-lines
|
|
|
|
|
(map #(str/split % #" "))
|
|
|
|
|
(map #(update % 1 read-string))))
|
|
|
|
|
[:xpos :depth]
|
|
|
|
|
)))
|
|
|
|
|
|
