From 50eee15a8a04b9075e813f817c1956861d37e4a0 Mon Sep 17 00:00:00 2001
From: dece <shgck@pistache.land>
Date: Mon, 16 Nov 2020 16:36:46 +0100
Subject: [PATCH] 2018 day 2

---
 .gitignore       |  1 +
 2018/day2.py     | 30 ++++++++++++++++++++++++++++++
 2018/skel.py.txt |  7 +++++++
 3 files changed, 38 insertions(+)
 create mode 100644 2018/day2.py
 create mode 100644 2018/skel.py.txt

diff --git a/.gitignore b/.gitignore
index 2943eb2..2a20608 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 day*.txt
+venv/
diff --git a/2018/day2.py b/2018/day2.py
new file mode 100644
index 0000000..c2108f8
--- /dev/null
+++ b/2018/day2.py
@@ -0,0 +1,30 @@
+def main():
+    with open("day2.txt", "rt") as f:
+        lines = [line.rstrip() for line in f.readlines()]
+
+    n2 = 0
+    n3 = 0
+    for line in lines:
+        occurences = [line.count(letter) for letter in line]
+        if 2 in occurences:
+            n2 += 1
+        if 3 in occurences:
+            n3 += 1
+    print(n2 * n3)
+
+    for line in lines:
+        for other in lines:
+            diffs = 0
+            common = ""
+            for c1, c2 in zip(line, other):
+                if c1 == c2:
+                    common += c1
+                else:
+                    diffs += 1
+            if diffs == 1:
+                print(common)
+                return
+
+
+if __name__ == "__main__":
+    main()
diff --git a/2018/skel.py.txt b/2018/skel.py.txt
new file mode 100644
index 0000000..732477d
--- /dev/null
+++ b/2018/skel.py.txt
@@ -0,0 +1,7 @@
+def main():
+    with open("", "rt") as f:
+        lines = [line.rstrip() for line in f.readlines()]
+
+
+if __name__ == "__main__":
+    main()