From d0195ce05c8c6e1d15baab740754674b9e78e61f Mon Sep 17 00:00:00 2001
From: NimVek <NimVek@users.noreply.github.com>
Date: Sun, 12 Nov 2023 16:16:20 +0100
Subject: [PATCH] add 2020 day 6

---
 README.md                        |  2 +-
 y2020/d06/__init__.py            |  3 +++
 y2020/d06/cases/example.11.6.txt | 15 +++++++++++++
 y2020/d06/cases/example.6..txt   |  3 +++
 y2020/d06/solution.py            | 37 ++++++++++++++++++++++++++++++++
 5 files changed, 59 insertions(+), 1 deletion(-)
 create mode 100644 y2020/d06/__init__.py
 create mode 100644 y2020/d06/cases/example.11.6.txt
 create mode 100644 y2020/d06/cases/example.6..txt
 create mode 100644 y2020/d06/solution.py

diff --git a/README.md b/README.md
index 074d434..8b540bc 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![AoC 2017](https://img.shields.io/badge/2017-★_24-bcb01b)](https://adventofcode.com/2017)
 [![AoC 2018](https://img.shields.io/badge/2018-★_9-fb7938)](https://adventofcode.com/2018)
 [![AoC 2019](https://img.shields.io/badge/2019-★_6-f26e3c)](https://adventofcode.com/2019)
-[![AoC 2020](https://img.shields.io/badge/2020-★_4-ec683f)](https://adventofcode.com/2020)
+[![AoC 2020](https://img.shields.io/badge/2020-★_6-f26e3c)](https://adventofcode.com/2020)
 [![AoC 2021](https://img.shields.io/badge/2021-★_50-44cc11)](https://adventofcode.com/2021)
 [![AoC 2022](https://img.shields.io/badge/2022-★_50-44cc11)](https://adventofcode.com/2022)
 [![AoC 2023](https://img.shields.io/badge/2023-★_0-9f9f9f)](https://adventofcode.com/2023)
diff --git a/y2020/d06/__init__.py b/y2020/d06/__init__.py
new file mode 100644
index 0000000..25755bb
--- /dev/null
+++ b/y2020/d06/__init__.py
@@ -0,0 +1,3 @@
+__year__ = 2020
+__day__ = 6
+__title__ = "Custom Customs"
diff --git a/y2020/d06/cases/example.11.6.txt b/y2020/d06/cases/example.11.6.txt
new file mode 100644
index 0000000..0f5b3bc
--- /dev/null
+++ b/y2020/d06/cases/example.11.6.txt
@@ -0,0 +1,15 @@
+abc
+
+a
+b
+c
+
+ab
+ac
+
+a
+a
+a
+a
+
+b
diff --git a/y2020/d06/cases/example.6..txt b/y2020/d06/cases/example.6..txt
new file mode 100644
index 0000000..a1bf3ea
--- /dev/null
+++ b/y2020/d06/cases/example.6..txt
@@ -0,0 +1,3 @@
+abcx
+abcy
+abcz
diff --git a/y2020/d06/solution.py b/y2020/d06/solution.py
new file mode 100644
index 0000000..6511c28
--- /dev/null
+++ b/y2020/d06/solution.py
@@ -0,0 +1,37 @@
+import functools
+import operator
+
+from aoc.lib.solution import SolutionBase
+
+import logging
+
+
+__all__ = ["Solution"]
+__log__ = logging.getLogger(__name__)
+
+
+class Solution(SolutionBase):
+    @staticmethod
+    def prepare(data):
+        if not any(isinstance(entry, list) for entry in data):
+            data = [data]
+        result = []
+        for entry in data:
+            if isinstance(entry, str):
+                result.append([set(entry)])
+            else:
+                result.append([set(e) for e in entry])
+        return tuple(result)
+
+    @staticmethod
+    def generic(data, function):
+        return sum(len(functools.reduce(function, entry)) for entry in data)
+
+    part_01 = functools.partial(generic, function=operator.__or__)
+    part_02 = functools.partial(generic, function=operator.__and__)
+
+
+if __name__ == "__main__":
+    import aoc.lib.main
+
+    aoc.lib.main.main(Solution)