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| -rw-r--r-- | src/day09.exs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/day09.exs b/src/day09.exs index 1e37cad..b8164e4 100644 --- a/src/day09.exs +++ b/src/day09.exs @@ -57,6 +57,11 @@ defmodule Day09 do defp locations(acc \\ [], revfiles, spaces) + # a (block size), b (block position), i (block index) + # c (space size), d (space position) + # IMPROVE ME: since there are at most 9 sizes, we could keep the + # locations of the spaces in a tree for each size, and achieve + # better performance, might do it later.. defp locations(acc, [{{a, b}, i} | t], spaces) do spaces = Enum.filter(spaces, fn {_, d} -> d < b end) |