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50 lines
1.6 KiB
Racket
50 lines
1.6 KiB
Racket
#lang br/quicklang
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(require racket/string (for-syntax syntax/strip-context))
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;; http://adventofcode.com/2016/day/10
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(provide read-syntax)
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(define (read-syntax path port)
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(strip-bindings
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#`(module mod "lang.rkt"
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#,@(for/list ([str (in-lines port)]
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#:when (not (equal? str "")))
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(format-datum '~a str)))))
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(define-macro (mb ARG ...)
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#'(#%module-begin
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ARG ...
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))
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(provide (rename-out [mb #%module-begin]))
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(define bots (make-hash))
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(define outputs (make-hash))
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(define chip-comparison-key '(17 61))
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(define-macro (value VAL goes to TYPE NUM)
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(with-pattern ([HASH-NAME (replace-context #'here (suffix-id #'TYPE "s"))])
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#'(begin
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(hash-update! HASH-NAME NUM (λ (val) (cons VAL val)) empty)
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#;(displayln (format "bots: ~v" bots))
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#;(displayln (format "outputs: ~v" outputs)))))
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(provide value)
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(define (bot-low bot)
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(define botvals (hash-ref bots bot))
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(define minval (car (sort botvals <)))
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(hash-set! bots bot (remove minval botvals))
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minval)
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(define (bot-high bot)
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(define botvals (hash-ref bots bot))
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(define maxval (car (sort botvals >)))
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(hash-set! bots bot (remove maxval botvals))
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maxval)
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; bot BOT gives low to LOW-TYPE LOW-NUM and high to HIGH-TYPE HIGH-NUM
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(define-macro (bot BOT gives low to LOW-TYPE LOW-NUM and high to HIGH-TYPE HIGH-NUM)
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#'(module+ main
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(when (equal? (sort (hash-ref bots BOT) <) (sort chip-comparison-key <))
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(displayln (format "answer: bot ~a holds ~a chips" BOT chip-comparison-key)))
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(value (bot-low BOT) goes to LOW-TYPE LOW-NUM)
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(value (bot-high BOT) goes to HIGH-TYPE HIGH-NUM)))
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(provide bot and) |