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aoc-racket/2016/day03.rkt

23 lines
677 B
Racket

#lang br/quicklang
(define (read-syntax path port)
(strip-bindings
#`(module mod "day03.rkt"
#,@(for*/list ([triangle-str (in-list (string-split (port->string port) "\n"))])
`(triangle ,@(string-split triangle-str))))))
(module+ reader (provide read-syntax))
(define-macro (mb . TRIANGLES)
#'(#%module-begin
(length (filter valid-triangle? (list . TRIANGLES)))))
(provide (rename-out [mb #%module-begin]))
(define-macro (triangle A B C)
#'(map string->number (list A B C)))
(provide triangle)
(define (valid-triangle? triangle)
(match-define (list a b c) triangle)
(and (> (+ a b) c)
(> (+ b c) a)
(> (+ a c) b)))