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| author | J.J <thechairman@thechairman.info> | 2024-05-30 21:49:58 -0400 |
|---|---|---|
| committer | J.J <thechairman@thechairman.info> | 2024-05-30 21:49:58 -0400 |
| commit | 231c2b688d1e6cf0846d46e883da30e042a9c6cf (patch) | |
| tree | 98a6d3a461fe190b38b2cf33a708a1d01703fa70 /aoc2018/day-01 | |
| parent | fe088aa5778dcdbaab4dd8d4a7395a91c444b45c (diff) | |
| parent | a2c2b728ec6051323ed937f54816089cd2ae9d20 (diff) | |
| download | gleam_aoc-231c2b688d1e6cf0846d46e883da30e042a9c6cf.tar.gz gleam_aoc-231c2b688d1e6cf0846d46e883da30e042a9c6cf.zip | |
Merge branch 'main' of https://github.com/hunkyjimpjorps/AdventOfCode
Diffstat (limited to 'aoc2018/day-01')
| -rw-r--r-- | aoc2018/day-01/day-01.rkt | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/aoc2018/day-01/day-01.rkt b/aoc2018/day-01/day-01.rkt new file mode 100644 index 0000000..b18f7c9 --- /dev/null +++ b/aoc2018/day-01/day-01.rkt @@ -0,0 +1,16 @@ +#lang racket + +(require advent-of-code + threading) + +(define deltas + (~>> (open-aoc-input (find-session) 2018 1 #:cache #true) port->lines (map string->number))) + +;; part 1 +(for/sum ([delta deltas]) delta) + +;; part 2 +(for/fold ([seen (set)] [current-frequency 0] #:result current-frequency) ([delta (in-cycle deltas)]) + (define new-frequency (+ current-frequency delta)) + #:final (set-member? seen new-frequency) + (values (set-add seen new-frequency) new-frequency)) |