1 files changed, 0 insertions, 108 deletions
diff --git a/aoc2017-gleam/src/aoc_2017/day_7.gleam b/aoc2017-gleam/src/aoc_2017/day_7.gleam
deleted file mode 100644
index a289fa5..0000000
--- a/aoc2017-gleam/src/aoc_2017/day_7.gleam
+++ /dev/null
@@ -1,108 +0,0 @@
-import gleam/dict.{type Dict}
-import gleam/int
-import gleam/list
-import gleam/option.{Some}
-import gleam/regex.{type Match, Match}
-import gleam/set
-import gleam/string
-
-pub type Program {
-  Program(name: String, weight: Int, supporting: List(String))
-}
-
-pub fn parse(input: String) {
-  let assert Ok(re) = regex.from_string("([a-z]+) \\(([0-9]+)\\)(?> -> (.*))?")
-
-  use match <- list.map(string.split(input, "\n"))
-  case regex.scan(re, match) {
-    [Match(submatches: [Some(name), Some(weight)], ..)] ->
-      Program(name, to_int(weight), [])
-    [Match(submatches: [Some(name), Some(weight), Some(supporting)], ..)] ->
-      Program(name, to_int(weight), string.split(supporting, ", "))
-    _ -> panic as { "couldn't parse" <> match }
-  }
-}
-
-fn to_int(str: String) -> Int {
-  let assert Ok(n) = int.parse(str)
-  n
-}
-
-pub fn pt_1(input: List(Program)) {
-  let supporters = input |> list.map(fn(p) { p.name }) |> set.from_list()
-  let supporting =
-    input |> list.flat_map(fn(p) { p.supporting }) |> set.from_list()
-
-  let assert [base] = set.difference(supporters, supporting) |> set.to_list
-  base
-}
-
-pub fn pt_2(input: List(Program)) {
-  let weights =
-    input |> list.map(fn(p) { #(p.name, p.weight) }) |> dict.from_list
-
-  let supporters =
-    input
-    |> list.filter_map(fn(p) {
-      case list.is_empty(p.supporting) {
-        True -> Error(Nil)
-        False -> Ok(#(p.name, p.supporting))
-      }
-    })
-    |> dict.from_list
-
-  supporters
-  |> dict.keys()
-  |> list.filter_map(fn(name) {
-    let branch_weights =
-      name
-      |> branch_weights(weights, supporters)
-      |> fn(tup: #(String, List(#(Int, String)))) { tup.1 }
-
-    case
-      branch_weights
-      |> list.map(fn(tup: #(Int, String)) { tup.0 })
-      |> list.unique
-      |> list.length
-    {
-      2 -> Ok(#(name, branch_weights))
-      _ -> Error(Nil)
-    }
-  })
-
-  // [
-  //  #("hmgrlpj", [#(2078, "drjmjug"), #(2070, "nigdlq"), #(2070, "omytneg"), ...]), 
-  //  #("smaygo", [#(14564, "hmgrlpj"), #(14556, "fbnbt"), #(14556, "nfdvsc")])
-  //  #("eugwuhl", [#(48292, "smaygo"), #(48284, "pvvbn"), #(48284, "hgizeb"), ...]),
-  // ]
-  //
-  // by inspection, eugwuhl -> smaygo -> hmgrlpj -> drjmjug; changing drjmjug will fix the tower
-
-  let assert Ok(w) = dict.get(weights, "drjmjug")
-  w - 8
-}
-
-fn branch_weights(
-  name: String,
-  weights: Dict(String, Int),
-  supporting: Dict(String, List(String)),
-) -> #(String, List(#(Int, String))) {
-  let supported = case dict.get(supporting, name) {
-    Ok(supported) -> supported
-    Error(_) -> []
-  }
-
-  let supported_weights =
-    list.map(supported, fn(s) {
-      let assert Ok(weight) = dict.get(weights, s)
-      let children_weights =
-        s
-        |> branch_weights(weights, supporting)
-        |> fn(tup: #(String, List(#(Int, String)))) { tup.1 }
-        |> list.map(fn(tup: #(Int, String)) { tup.0 })
-      weight + int.sum(children_weights)
-    })
-    |> list.zip(supported)
-
-  #(name, supported_weights)
-}