Day 3,4

author: Orfeas Chatzipanagiotis <csd4366@csd.uoc.gr> 2022-12-08 05:45:14 +0200
committer: Orfeas Chatzipanagiotis <csd4366@csd.uoc.gr> 2022-12-09 11:57:39 +0200
commit: 52123945a7bf2d627f3000add96d30f46c6f48b8 (patch)
tree: bdf168e85a030b96fd610d11293039f4f1907bc3 /day3
parent: Day 2 (diff)
download: aoc22-52123945a7bf2d627f3000add96d30f46c6f48b8.tar.gz
aoc22-52123945a7bf2d627f3000add96d30f46c6f48b8.zip
3 files changed, 353 insertions, 0 deletions
diff --git a/day3/example.txt b/day3/example.txt
new file mode 100644
index 0000000..f17e726
--- /dev/null
+++ b/day3/example.txt
@@ -0,0 +1,6 @@
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diff --git a/day3/input.txt b/day3/input.txt
new file mode 100644
index 0000000..a30889c
--- /dev/null
+++ b/day3/input.txt
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diff --git a/day3/solution.nim b/day3/solution.nim
new file mode 100644
index 0000000..6df88f2
--- /dev/null
+++ b/day3/solution.nim
@@ -0,0 +1,47 @@
+import std/strutils
+import std/sequtils
+import std/sets
+proc Points(c: char): int =
+  if c.isLowerAscii():
+    return ord(c) - ord('a') + 1
+  else:
+    return ord(c) - ord('A') + 27
+proc part1(content: seq[string]): int =
+  let ruckshacks = map( content,
+      proc(line: string): tuple[first: string, second: string] = 
+        let pivot = int(line.len()/2)
+        (line[0 .. pivot-1], line[pivot .. ^1])
+    )
+  var score = 0
+  for ruckshack in ruckshacks:
+    let
+      uniqFirst = toHashSet(ruckshack.first)
+      uniqSecond = toHashSet(ruckshack.second)
+    var c = toSeq(uniqFirst * uniqSecond)[0]
+    score += Points(c)
+  return score
+proc part2(content: seq[string]): int =
+  assert(content.len() mod 3 == 0)
+ 
+  let ruckshacks = content
+  var score = 0
+  for i in countup(0, ruckshacks.len()-1, 3):
+    let 
+      uniqFirst = toHashSet(ruckshacks[i])
+      uniqSecond = toHashSet(ruckshacks[i+1])
+      uniqThird = toHashSet(ruckshacks[i+2])
+    var c = toSeq(uniqFirst * uniqSecond * uniqThird)[0]
+    score += Points(c)
+  return score
+let content = readFile("./input.txt").strip().split("\n")
+echo part1(content)
+echo part2(content)
author	Orfeas Chatzipanagiotis <csd4366@csd.uoc.gr>	2022-12-08 05:45:14 +0200
committer	Orfeas Chatzipanagiotis <csd4366@csd.uoc.gr>	2022-12-09 11:57:39 +0200
commit	52123945a7bf2d627f3000add96d30f46c6f48b8 (patch)
tree	bdf168e85a030b96fd610d11293039f4f1907bc3 /day3
parent	Day 2 (diff)
download	aoc22-52123945a7bf2d627f3000add96d30f46c6f48b8.tar.gz aoc22-52123945a7bf2d627f3000add96d30f46c6f48b8.zip

diff --git a/day3/example.txt b/day3/example.txt new file mode 100644 index 0000000..f17e726 --- /dev/null +++ b/day3/example.txt
@@ -0,0 +1,6 @@
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	4	wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn
	5	ttgJtRGJQctTZtZT
	6	CrZsJsPPZsGzwwsLwLmpwMDw


diff --git a/day3/input.txt b/day3/input.txt new file mode 100644 index 0000000..a30889c --- /dev/null +++ b/day3/input.txt
@@ -0,0 +1,300 @@
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diff --git a/day3/solution.nim b/day3/solution.nim new file mode 100644 index 0000000..6df88f2 --- /dev/null +++ b/day3/solution.nim
@@ -0,0 +1,47 @@
	1	import std/strutils
	2	import std/sequtils
	3	import std/sets
	4
	5	proc Points(c: char): int =
	6	if c.isLowerAscii():
	7	return ord(c) - ord('a') + 1
	8	else:
	9	return ord(c) - ord('A') + 27
	10
	11	proc part1(content: seq[string]): int =
	12	let ruckshacks = map( content,
	13	proc(line: string): tuple[first: string, second: string] =
	14	let pivot = int(line.len()/2)
	15	(line[0 .. pivot-1], line[pivot .. ^1])
	16	)
	17
	18	var score = 0
	19	for ruckshack in ruckshacks:
	20	let
	21	uniqFirst = toHashSet(ruckshack.first)
	22	uniqSecond = toHashSet(ruckshack.second)
	23
	24	var c = toSeq(uniqFirst * uniqSecond)[0]
	25	score += Points(c)
	26
	27	return score
	28
	29	proc part2(content: seq[string]): int =
	30	assert(content.len() mod 3 == 0)
	31
	32	let ruckshacks = content
	33	var score = 0
	34	for i in countup(0, ruckshacks.len()-1, 3):
	35	let
	36	uniqFirst = toHashSet(ruckshacks[i])
	37	uniqSecond = toHashSet(ruckshacks[i+1])
	38	uniqThird = toHashSet(ruckshacks[i+2])
	39
	40	var c = toSeq(uniqFirst * uniqSecond * uniqThird)[0]
	41	score += Points(c)
	42
	43	return score
	44
	45	let content = readFile("./input.txt").strip().split("\n")
	46	echo part1(content)
	47	echo part2(content)