diff options
-rw-r--r-- | aoc2023-other/day-01/day-01.rkt | 38 | ||||
-rw-r--r-- | aoc2023/adglent_cheatsheet.md | 3 | ||||
-rw-r--r-- | aoc2023/src/day1/solve.gleam | 30 |
3 files changed, 53 insertions, 18 deletions
diff --git a/aoc2023-other/day-01/day-01.rkt b/aoc2023-other/day-01/day-01.rkt new file mode 100644 index 0000000..b720f79 --- /dev/null +++ b/aoc2023-other/day-01/day-01.rkt @@ -0,0 +1,38 @@ +#lang racket + +(require advent-of-code + threading) + +(define calibration-values (fetch-aoc-input (find-session) 2023 1)) + +(define (to-number str) + (match (string->number str) + [#false (hash-ref word-to-digit str)] + [n n])) + +(define (parse-calibration-value v valid) + (for/fold ([acc '()] [value v] #:result (+ (to-number (first acc)) (* 10 (to-number (last acc))))) + ([_ (in-naturals)]) + #:break (equal? value "") + (let ([possible-prefix (findf (curry string-prefix? value) valid)]) + (if possible-prefix + (values (cons possible-prefix acc) (substring value 1)) + (values acc (substring value 1)))))) + +(define (total-calibration input valid) + (~> input + (string-trim) + (string-split "\n") + (map (λ~> (parse-calibration-value valid)) _) + (apply + _))) + +;; part 1 + +(define valid-for-part-1 (~> (range 1 10) (map ~a _))) +(total-calibration calibration-values valid-for-part-1) + +;; part 2 +(define word-to-digit + (hash "one" 1 "two" 2 "three" 3 "four" 4 "five" 5 "six" 6 "seven" 7 "eight" 8 "nine" 9)) +(define valid-for-part-2 (append valid-for-part-1 (hash-keys word-to-digit))) +(total-calibration calibration-values valid-for-part-2) diff --git a/aoc2023/adglent_cheatsheet.md b/aoc2023/adglent_cheatsheet.md new file mode 100644 index 0000000..4061e1b --- /dev/null +++ b/aoc2023/adglent_cheatsheet.md @@ -0,0 +1,3 @@ +Set up a solution: `gleam run -m adglent/day <n>` +Check against examples: `gleam test -- --modules=day<n>/day<n>_test` +Get final answer: `gleam run -m day<n>/solve <p>`
\ No newline at end of file diff --git a/aoc2023/src/day1/solve.gleam b/aoc2023/src/day1/solve.gleam index fbc160f..ed14bde 100644 --- a/aoc2023/src/day1/solve.gleam +++ b/aoc2023/src/day1/solve.gleam @@ -3,29 +3,24 @@ import gleam/io import gleam/list import gleam/string import gleam/regex.{type Match, Match} -import gleam/result import gleam/int -fn parse_digits(input: String) { - let assert Ok(re) = regex.from_string("[0-9]") +pub fn part1(input: String) { + let assert Ok(re) = regex.from_string("[1-9]") input |> string.split("\n") - |> list.map(fn(s) { - let matches = regex.scan(s, with: re) - - let assert Ok(Match(content: first, ..)) = list.first(matches) - let assert Ok(Match(content: last, ..)) = list.last(matches) - - int.parse(first <> last) - }) -} + |> list.fold( + 0, + fn(acc, s) { + let matches = regex.scan(s, with: re) -pub fn part1(input: String) { - input - |> parse_digits - |> result.values - |> int.sum + let assert Ok(Match(content: first, ..)) = list.first(matches) + let assert Ok(Match(content: last, ..)) = list.last(matches) + let assert Ok(i) = int.parse(first <> last) + acc + i + }, + ) |> string.inspect } @@ -39,7 +34,6 @@ const substitutions = [ #("seven", "7n"), #("eight", "e8t"), #("nine", "n9e"), - #("zero", "0o"), ] pub fn part2(input: String) { |