From 11abe4784c81a421178f5ebcf7ddf96dffaa7a45 Mon Sep 17 00:00:00 2001
From: sterni <sternenseemann@systemli.org>
Date: Wed, 7 Dec 2022 20:13:45 +0100
Subject: feat(sterni/aoc/2022): day07 BQN solution

Did not have the motivation to go back and improve things, so this is my
initial attempt.

Change-Id: I3e129523d8f6c03bfbe50351f78d56ec7254a2dc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7539
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Autosubmit: sterni <sternenseemann@systemli.org>
---
 users/sterni/exercises/aoc/2022/07/7.bqn | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 users/sterni/exercises/aoc/2022/07/7.bqn

diff --git a/users/sterni/exercises/aoc/2022/07/7.bqn b/users/sterni/exercises/aoc/2022/07/7.bqn
new file mode 100644
index 000000000000..2fc387f3406d
--- /dev/null
+++ b/users/sterni/exercises/aoc/2022/07/7.bqn
@@ -0,0 +1,24 @@
+lib ← •Import "../../lib.bqn"
+cmds ← 1↓ '$' ((+`= ⟜(⊑¨))⊔⊢) •FLines "input"
+paths ← (<⟨⟩) {
+  𝕨 𝕊 "$ ls": 𝕨;
+  𝕨 𝕊 "$ cd /": ⟨⟩;
+  𝕨 𝕊 "$ cd ..": (-1)↓𝕨;
+  𝕨 𝕊 𝕩: 𝕨∾<5↓𝕩 # "$ cd …"
+}` ⊑¨cmds
+ParseLs ← {
+  dirs‿files ← 2↑((lib.IsAsciiNum∘⊑∘⊑)¨⊔⊢) ((<' ')⊸lib.SplitOn)¨ 1↓𝕩
+  (1⊑¨dirs)⋈(lib.ReadDec 0⊸⊑)¨files
+}
+dirlists ← ParseLs⌾(1⊸⊑)¨⥊⋈˘(("$ cd"⊸≢⟜(4⊸↑)∘⊑¨)∘(1⊸⊏)˘/⊢) (⍒≠¨paths)⊏⍉paths≍cmds
+DirSize ← {⊑𝕨 (⊑∘(1⊸⊑¨∘⊣⊐⊢)⊑⊣) <𝕩}
+DirName ← ∾'/'⊸∾¨
+dirsizes ← ⊑¨ ⟨⟩ {
+  szs 𝕊 ⟨dir, subdirs‿files⟩:
+  Canon ← DirName dir⊸∾⟜⋈
+  sz ← +´files∾szs⊸DirSize∘Canon¨ subdirs
+  szs∾<sz⋈DirName dir
+}˜´ ⌽dirlists
+
+•Out "day07.1: "∾•Fmt +´ 100000 (≥/⊢) dirsizes
+•Out "day07.2: "∾•Fmt (30000000-70000000-⌈´dirsizes) ⌊´∘(≤/⊢) dirsizes
-- 
cgit 1.4.1