1 files changed, 0 insertions, 46 deletions
diff --git a/2022/day-12/day-12.rkt b/2022/day-12/day-12.rkt
deleted file mode 100644
index c3f01ac..0000000
--- a/2022/day-12/day-12.rkt
+++ /dev/null
@@ -1,46 +0,0 @@
-#lang racket
-
-(require advent-of-code
-         graph)
-
-(define raw-terrain (fetch-aoc-input (find-session) 2022 12 #:cache #true))
-(define special-points (make-hash))
-
-(define terrain-mesh
-  (for*/hash ([(row x) (in-indexed (string-split raw-terrain))] [(col y) (in-indexed row)])
-    (define p (cons x y))
-    (case col
-      [(#\S)
-       (hash-set! special-points 'start p)
-       (values p 0)]
-      [(#\E)
-       (hash-set! special-points 'end p)
-       (values p 25)]
-      [else (values p (- (char->integer col) (char->integer #\a)))])))
-
-(define (neighbors p)
-  (match-define (cons x y) p)
-  (for*/list ([dx (in-list '(-1 0 1))]
-              [dy (in-list '(-1 0 1))]
-              #:when (= 1 (abs (+ dx dy)))
-              #:do [(define p* (cons (+ x dx) (+ y dy)))]
-              #:when (hash-has-key? terrain-mesh p*))
-    p*))
-
-(define paths
-  (directed-graph (for*/list ([p (in-list (hash-keys terrain-mesh))]
-                              [p* (in-list (neighbors p))]
-                              #:unless (> (sub1 (hash-ref terrain-mesh p*))
-                                          (hash-ref terrain-mesh p)))
-                    (list p p*))))
-
-;; part 1
-(time (match-define-values (distances _) (bfs paths (hash-ref special-points 'start)))
-      (hash-ref distances (hash-ref special-points 'end)))
-
-;; part 2
-(time (for/lists
-       (lengths #:result (apply min lengths))
-       ([start (in-list (hash-keys terrain-mesh))] #:when (= 0 (hash-ref terrain-mesh start)))
-       (match-define-values (distances _) (bfs paths start))
-       (hash-ref distances (hash-ref special-points 'end))))