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| author | HJ <thechairman@thechairman.info> | 2021-12-09 18:05:04 -0500 |
|---|---|---|
| committer | HJ <thechairman@thechairman.info> | 2021-12-09 18:05:04 -0500 |
| commit | 527bc4762f9c66c9244f0ac1fbee6357478ac9ef (patch) | |
| tree | ecd3ffc97de5aab201699f93aab1e0417ac3d25d /2015/day-04/day-04.rkt | |
| download | gleam_aoc-527bc4762f9c66c9244f0ac1fbee6357478ac9ef.tar.gz gleam_aoc-527bc4762f9c66c9244f0ac1fbee6357478ac9ef.zip | |
putting all my solutions together in 1 repository
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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