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authorJ.J <thechairman@thechairman.info>2023-11-30 17:10:00 -0500
committerJ.J <thechairman@thechairman.info>2023-11-30 17:10:00 -0500
commit8ab65dc2da1742eb86ec636c50c7018385b68167 (patch)
treec4fd556aca9b867cfa1f2f174128c30857353884 /aoc2015/day-04
parentfafbeaf9e3c09ba7a5bea7e47d5736001f8a5aa1 (diff)
downloadgleam_aoc-8ab65dc2da1742eb86ec636c50c7018385b68167.tar.gz
gleam_aoc-8ab65dc2da1742eb86ec636c50c7018385b68167.zip
prep for 2023, renaming for consistency
Diffstat (limited to 'aoc2015/day-04')
-rw-r--r--aoc2015/day-04/day-04.rkt18
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diff --git a/aoc2015/day-04/day-04.rkt b/aoc2015/day-04/day-04.rkt
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+#lang racket
+(require "../../jj-aoc.rkt"
+ threading
+ file/md5)
+
+(define secret-key (~> (open-day 4 2015) port->string string-trim))
+
+(define (find-n-zeroes n)
+ (for/first ([i (in-naturals)]
+ #:when
+ (~>> i (~a secret-key) md5 bytes->string/utf-8 (string-prefix? _ (make-string n #\0))))
+ i))
+
+;; part 1
+(time (find-n-zeroes 5))
+
+;; part 2
+(time (find-n-zeroes 6))