aoc-all

commit ef3b58cb5b357dae05a05cc6964d55f6ffbb2cb8
parent 02255f39187cc8f74350c0725f841f21e7c3c4fa
Author: Natasha Kerensikova <natgh@instinctive.eu>
Date:   Tue,  3 Dec 2024 19:42:02 +0000

Day 3 reference and solutions
Diffstat:
A
2024/day03.nim
 | 
46
++++++++++++++++++++++++++++++++++++++++++++++
A
2024/ref/day03a.txt
 | 
1
+
A
2024/ref/day03b.txt
 | 
1
+

3 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/2024/day03.nim b/2024/day03.nim
@@ -0,0 +1,46 @@
+# Copyright (c) 2024, Natacha Porté
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+from std/re       import findAll, re
+from std/sequtils import foldl, map, toSeq
+from std/strutils import parseInt, split
+
+# Read input file
+
+let data = stdin.lines().toSeq()
+
+# Puzzle 1
+
+func summul(s: string): int =
+  for subs in findAll(s, re"mul\(\d+,\d+\)"):
+    let n = split(subs[4 .. ^2], ",").map(parseInt)
+    result += foldl(n, a * b)
+
+echo "Puzzle 1: ", data.map(summul).foldl(a + b)
+
+# Puzzle 2
+
+func dosummul(s: string): int =
+  var active = true
+  for subs in findAll(s, re"mul\(\d+,\d+\)|do\(\)|don't\(\)"):
+    case subs[0 .. 3]
+    of "do()":
+      active = true
+    of "don'":
+      active = false
+    of "mul(":
+      if active:
+        result += subs[4 .. ^2].split(",").map(parseInt).foldl(a * b)
+
+echo "Puzzle 2: ", data.foldl(a & b).dosummul()
diff --git a/2024/ref/day03a.txt b/2024/ref/day03a.txt
@@ -0,0 +1 @@
+xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))
diff --git a/2024/ref/day03b.txt b/2024/ref/day03b.txt
@@ -0,0 +1 @@
+xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))