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Diffstat (limited to 'aoc2021/day-02/day-02.rkt')
-rw-r--r-- | aoc2021/day-02/day-02.rkt | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/aoc2021/day-02/day-02.rkt b/aoc2021/day-02/day-02.rkt deleted file mode 100644 index 0bd0c3d..0000000 --- a/aoc2021/day-02/day-02.rkt +++ /dev/null @@ -1,24 +0,0 @@ -#lang racket -(require advent-of-code - threading - algorithms) - -(define motion-data - (~> (open-aoc-input (find-session) 2021 2 #:cache (string->path "./cache")) - (port->list read _) - (chunks-of _ 2))) - -;; part 1 -(for/fold ([depth 0] [position 0] #:result (* depth position)) ([motion (in-list motion-data)]) - (match motion - [(list 'forward x) (values depth (+ position x))] - [(list 'up x) (values (- depth x) position)] - [(list 'down x) (values (+ depth x) position)])) - -;; part 2 -(for/fold ([aim 0] [depth 0] [position 0] #:result (* depth position)) - ([motion (in-list motion-data)]) - (match motion - [(list 'forward x) (values aim (+ depth (* aim x)) (+ position x))] - [(list 'up x) (values (- aim x) depth position)] - [(list 'down x) (values (+ aim x) depth position)])) |