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| author | Hunky Jimpjorps <thechairman@thechairman.info> | 2024-02-02 17:24:30 -0500 |
|---|---|---|
| committer | Hunky Jimpjorps <thechairman@thechairman.info> | 2024-02-02 17:24:30 -0500 |
| commit | 547fe03cf43105f46160e2dd9afff21637eaaf47 (patch) | |
| tree | 8010032bf495ad120a4d586a7a96ebc9139e3f32 | |
| parent | 48e35ad3b0b0c62f936784e4aca70b17c3b0e3f9 (diff) | |
| download | gleam_aoc-547fe03cf43105f46160e2dd9afff21637eaaf47.tar.gz gleam_aoc-547fe03cf43105f46160e2dd9afff21637eaaf47.zip | |
2018, day 1 complete
| -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)) |