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Diffstat (limited to '2015/day-04/day-04.rkt')
| -rw-r--r-- | 2015/day-04/day-04.rkt | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/2015/day-04/day-04.rkt b/2015/day-04/day-04.rkt new file mode 100644 index 0000000..4008b92 --- /dev/null +++ b/2015/day-04/day-04.rkt @@ -0,0 +1,23 @@ +#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))
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