From 82be8473d21c15bc22c46cc4ba5463e3d2213c7d Mon Sep 17 00:00:00 2001
From: j-james
Date: Mon, 5 Dec 2022 00:01:10 -0800
Subject: Day Four

---
 2022/nim/day04/src/main.nim | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 2022/nim/day04/src/main.nim

(limited to '2022/nim/day04')

diff --git a/2022/nim/day04/src/main.nim b/2022/nim/day04/src/main.nim
new file mode 100644
index 0000000..bb024fb
--- /dev/null
+++ b/2022/nim/day04/src/main.nim
@@ -0,0 +1,23 @@
+# Day 4: Camp Cleanup
+import std/[os, strutils, sequtils, sugar]
+
+let input = paramStr(1).readFile().strip().split("\n")
+
+let assign = input.mapIt(it.split(","))
+  .mapIt(it.mapIt(it.split("-").map(parseInt)))
+
+func contains(a, b: seq[int]): bool =
+  return a[0] in b[0] .. b[1] and
+         a[1] in b[0] .. b[1] or
+         b[0] in a[0] .. a[1] and
+         b[1] in a[0] .. a[1]
+
+echo assign.filterIt(contains(it[0], it[1])).len
+
+func overlaps(a, b: seq[int]): bool =
+  return a[0] in b[0] .. b[1] or
+         a[1] in b[0] .. b[1] or
+         b[0] in a[0] .. a[1] or
+         b[1] in a[0] .. a[1]
+
+echo assign.filterIt(overlaps(it[0], it[1])).len
-- 
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