1 files changed, 0 insertions, 40 deletions
diff --git a/aoc2023-racket/day-04/day-04.rkt b/aoc2023-racket/day-04/day-04.rkt
deleted file mode 100644
index 7a357c5..0000000
--- a/aoc2023-racket/day-04/day-04.rkt
+++ /dev/null
@@ -1,40 +0,0 @@
-#lang racket
-
-(require advent-of-code
-         data/applicative
-         data/either
-         data/monad
-         megaparsack
-         megaparsack/text
-         threading)
-
-(struct card (n wins))
-
-(define card/p
-  (do (string/p "Card")
-    (many/p space/p)
-    [n <- integer/p]
-    (string/p ":")
-    (many/p space/p)
-    [winners <- (many-until/p integer/p #:sep (many/p space/p) #:end (try/p (string/p " | ")))]
-    (many/p space/p)
-    [has <- (many+/p integer/p #:sep (many/p space/p))]
-    (pure (card n (set-count (set-intersect (first winners) has))))))
-
-(define raw-cards (~> (open-aoc-input (find-session) 2023 4 #:cache #true) port->lines))
-
-;; part 1
-(for/sum ([raw-card (in-list raw-cards)]
-          #:do [(match-define (success (card _ wins)) (parse-string card/p raw-card))]
-          #:unless (= wins 0))
-  (expt 2 (sub1 wins)))
-
-;; part 2
-(for/fold ([counts (for/hash ([n (in-inclusive-range 1 (length raw-cards))])
-                     (values n 1))]
-           #:result (apply + (hash-values counts)))
-          ([raw-card (in-list raw-cards)]
-           #:do [(match-define (success (card n wins)) (parse-string card/p raw-card))])
-  (define bonus-range (inclusive-range (+ n 1) (+ n wins)))
-  (define won-cards (hash-ref counts n))
-  (foldl (λ (n acc) (hash-update acc n (curry + won-cards))) counts bonus-range))