You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
This repo is archived. You can view files and clone it, but cannot push or open issues/pull-requests.
|
|
|
|
#lang br/quicklang ;; http://adventofcode.com/2016/day/22
|
|
|
|
|
(provide read-syntax
|
|
|
|
|
(rename-out [mb #%module-begin]))
|
|
|
|
|
|
|
|
|
|
(define (read-syntax path port)
|
|
|
|
|
(strip-bindings
|
|
|
|
|
(let ([lines (string-split (port->string port) "\n")])
|
|
|
|
|
#`(module mod "lang.rkt"
|
|
|
|
|
#,@(for/list ([args (in-list (map string-split (cddr lines)))])
|
|
|
|
|
`(node ,@args))))))
|
|
|
|
|
|
|
|
|
|
(define-macro (mb . NODES)
|
|
|
|
|
#'(#%module-begin
|
|
|
|
|
(define nodes (list . NODES))
|
|
|
|
|
(count-viable-pairs nodes)))
|
|
|
|
|
|
|
|
|
|
(struct $node (pos used avail) #:transparent)
|
|
|
|
|
|
|
|
|
|
(define-macro (node NAME _ USED AVAIL _)
|
|
|
|
|
#'($node
|
|
|
|
|
(apply (λ (r i) (+ (string->number r)
|
|
|
|
|
(* (string->number i) +i))) (regexp-match* #px"\\d+" NAME))
|
|
|
|
|
(string->number (string-trim USED "T"))
|
|
|
|
|
(string->number (string-trim AVAIL "T"))))
|
|
|
|
|
(provide node)
|
|
|
|
|
|
|
|
|
|
(define (count-viable-pairs nodes)
|
|
|
|
|
(for*/sum ([a (in-list nodes)]
|
|
|
|
|
[b (in-list nodes)]
|
|
|
|
|
#:when (and (not (zero? ($node-used a)))
|
|
|
|
|
(not (equal? ($node-pos a) ($node-pos b)))
|
|
|
|
|
(<= ($node-used a) ($node-avail b))))
|
|
|
|
|
1))
|
