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authorH.J <thechairman@thechairman.info>2024-10-09 11:36:55 -0400
committerH.J <thechairman@thechairman.info>2024-10-09 11:36:55 -0400
commit8777ff071f7bb37631baa7b6717ad29961e50911 (patch)
tree6d59c4ed58e454b960339c3d1151f0a879e8d7cb /aoc2023-racket/day-01/day-01.rkt
parent6156a9ef7be4012063a042aafb4e9b0d7eadde8e (diff)
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-rw-r--r--aoc2023-racket/day-01/day-01.rkt38
1 files changed, 0 insertions, 38 deletions
diff --git a/aoc2023-racket/day-01/day-01.rkt b/aoc2023-racket/day-01/day-01.rkt
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--- a/aoc2023-racket/day-01/day-01.rkt
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-#lang racket
-
-(require advent-of-code
- threading)
-
-(define calibration-values (fetch-aoc-input (find-session) 2023 1))
-
-(define (to-number str)
- (match (string->number str)
- [#false (hash-ref word-to-digit str)]
- [n n]))
-
-(define (parse-calibration-value v valid)
- (for/fold ([acc '()] [value v] #:result (+ (to-number (first acc)) (* 10 (to-number (last acc)))))
- ([_ (in-naturals)])
- #:break (equal? value "")
- (let ([possible-prefix (findf (curry string-prefix? value) valid)])
- (if possible-prefix
- (values (cons possible-prefix acc) (substring value 1))
- (values acc (substring value 1))))))
-
-(define (total-calibration input valid)
- (~> input
- (string-trim)
- (string-split "\n")
- (map (λ~> (parse-calibration-value valid)) _)
- (apply + _)))
-
-;; part 1
-
-(define valid-for-part-1 (~> (range 1 10) (map ~a _)))
-(total-calibration calibration-values valid-for-part-1)
-
-;; part 2
-(define word-to-digit
- (hash "one" 1 "two" 2 "three" 3 "four" 4 "five" 5 "six" 6 "seven" 7 "eight" 8 "nine" 9))
-(define valid-for-part-2 (append valid-for-part-1 (hash-keys word-to-digit)))
-(total-calibration calibration-values valid-for-part-2)