d1

6 years ago · 5718ef6aad
parent 0470b75be4
commit 5718ef6aad
3 changed files with 984 additions and 0 deletions
--- a/2018/01-test.txt
+++ b/2018/01-test.txt
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--- a/2018/01.rkt
+++ b/2018/01.rkt
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 #lang debug br
 (require racket/set)
 (define fp (open-input-file "01.txt"))
 (define frequencies
  (map string->number (port->lines fp)))
 (define (*)
  (apply + frequencies))
 (define (**)
  (for/fold ([last-sum 0]
             [sums (set)]
             #:result last-sum)
            ([freq (in-cycle frequencies)]
             #:break (set-member? sums last-sum))
    (values (+ freq last-sum) (set-add sums last-sum))))
 (module+ main
  (require rackunit)
  (check-equal? (time (*)) 454)
  (check-equal? (time (**)) 566))
--- a/2018/01.txt
+++ b/2018/01.txt
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