From dcbdbcf128f385e458c3c2486c5c26846f634475 Mon Sep 17 00:00:00 2001
From: sloane <1699281+sloanelybutsurely@users.noreply.github.com>
Date: Thu, 7 Dec 2023 10:49:26 -0500
Subject: [PATCH] solve 2023 7.2
---
2023/lib/2023/7.ex | 58 +++++++++++++++++++++++++++++++++++-----------
README.md | 2 +-
2 files changed, 46 insertions(+), 14 deletions(-)
diff --git a/2023/lib/2023/7.ex b/2023/lib/2023/7.ex
index d87ef7d..b4e8c0b 100644
--- a/2023/lib/2023/7.ex
+++ b/2023/lib/2023/7.ex
@@ -4,7 +4,14 @@ import AOCHelpers
aoc 2023, 7 do
def p1(input) do
input
- |> read_input()
+ |> read_input(fn
+ "A" -> 14
+ "K" -> 13
+ "Q" -> 12
+ "J" -> 11
+ "T" -> 10
+ n -> String.to_integer(n)
+ end)
|> Enum.map(fn [hand, bet] ->
counts =
hand
@@ -21,30 +28,55 @@ aoc 2023, 7 do
|> Enum.sum()
end
- def p2(_input) do
+ def p2(input) do
+ input
+ |> read_input(fn
+ "J" -> -1
+ "A" -> 14
+ "K" -> 13
+ "Q" -> 12
+ "T" -> 10
+ n -> String.to_integer(n)
+ end)
+ |> Enum.map(fn [hand, bet] ->
+ {jokers, hand_without_jokers} = Enum.split_with(hand, &(&1 === -1))
+
+ number_of_jokers = Enum.count(jokers)
+
+ counts_without_jokers =
+ hand_without_jokers
+ |> Enum.frequencies()
+ |> Map.values()
+ |> Enum.sort(:desc)
+
+ counts = [
+ List.first(counts_without_jokers, 0) + number_of_jokers
+ | Enum.drop(counts_without_jokers, 1)
+ ]
+
+ [counts, hand, bet]
+ end)
+ |> Enum.sort(&compare_hands_1/2)
+ |> Enum.map(&Enum.at(&1, 2))
+ |> Enum.with_index(1)
+ |> Enum.map(fn {bet, rank} -> bet * rank end)
+ |> Enum.sum()
end
- def read_input(input) do
+ def read_input(input, card_to_number) do
input
|> lines()
|> Enum.map(fn line ->
line
|> words()
- |> map_list([&to_numeric_hand/1, &String.to_integer/1])
+ |> map_list([&to_numeric_hand(&1, card_to_number), &String.to_integer/1])
end)
end
- def to_numeric_hand(str) do
+ def to_numeric_hand(str, card_to_number) do
str
|> letters()
- |> Enum.map(fn
- "A" -> 14
- "K" -> 13
- "Q" -> 12
- "J" -> 11
- "T" -> 10
- n -> String.to_integer(n)
- end)
+ |> Enum.map(card_to_number)
end
def compare_hands_1([counts, hand_a, _], [counts, hand_b, _]), do: hand_a <= hand_b
diff --git a/README.md b/README.md
index 21d004d..a4256b4 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@
1. [2020] **17/50** 🌟
1. [2021] **43/50** 🌟
1. [2022] **14/50** 🌟
-1. [2023] **10/50** 🌟
+1. [2023] **11/50** 🌟
[2015]: ./2015
[2017]: ./2017