1 files changed, 0 insertions, 52 deletions
diff --git a/aoc2019/day-03/day-03.rkt b/aoc2019/day-03/day-03.rkt
deleted file mode 100644
index 6da3a07..0000000
--- a/aoc2019/day-03/day-03.rkt
+++ /dev/null
@@ -1,52 +0,0 @@
-#lang racket
-
-(require advent-of-code
-         threading
-         fancy-app
-         racket/hash)
-
-(define/match (instruction-parse _str)
-  [((regexp #px"(.)(.+)" (list _ (app string->symbol dir) (app string->number amt)))) (cons dir amt)])
-
-(define (wire-parse str)
-  (~> str (string-split ",") (map instruction-parse _)))
-
-(define wires
-  (~>> (fetch-aoc-input (find-session) 2019 3 #:cache #true) string-split (map wire-parse)))
-
-(define (manhattan-distance-from-origin p)
-  (+ (abs (car p)) (abs (cdr p))))
-
-(define (trace-wire-path wire)
-  (for/fold ([path (hash)] [x 0] [y 0] [len 0] #:result path) ([inst (in-list wire)])
-    (define-values (x* y*)
-      (match inst
-        [(cons 'U dy) (values x (+ y dy))]
-        [(cons 'D dy) (values x (- y dy))]
-        [(cons 'R dx) (values (+ x dx) y)]
-        [(cons 'L dx) (values (- x dx) y)]))
-    (define next-segment
-      (for*/list ([new-x (inclusive-range x x* (if (< x x*) 1 -1))]
-                  [new-y (inclusive-range y y* (if (< y y*) 1 -1))])
-        (cons new-x new-y)))
-    (define numbered-segments
-      (for/hash ([segment (in-list next-segment)] [new-len (in-naturals len)])
-        (values segment new-len)))
-    (values (hash-union path numbered-segments #:combine (λ (v0 _) v0)) x* y* (+ len (cdr inst)))))
-
-;; part 1
-(define wire-paths (map trace-wire-path wires))
-
-(define intersections
-  (~>> wire-paths
-       (map (λ~> hash-keys list->set))
-       (apply set-intersect)
-       (set-remove _ '(0 . 0))
-       set->list))
-
-(~>> intersections (map manhattan-distance-from-origin) (apply min))
-
-;; part 2
-(~>> (for/list ([intersection (in-list intersections)])
-       (~>> wire-paths (map (hash-ref _ intersection)) (apply +)))
-     (apply min))