From 27395c908c9e907505a716329ae65e3c3face365 Mon Sep 17 00:00:00 2001
From: Luke Hubmayer-Werner <mongoose41@gmail.com>
Date: Thu, 10 Dec 2020 18:43:53 +1030
Subject: [PATCH] 2020 days 1 and 2

---
 2020/day01.py |   18 +
 2020/day02.py |   10 +
 2020/input01  |  200 ++++++++++
 2020/input02  | 1000 +++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 1228 insertions(+)
 create mode 100644 2020/day01.py
 create mode 100644 2020/day02.py
 create mode 100644 2020/input01
 create mode 100644 2020/input02

diff --git a/2020/day01.py b/2020/day01.py
new file mode 100644
index 0000000..7d6747e
--- /dev/null
+++ b/2020/day01.py
@@ -0,0 +1,18 @@
+with open('input01', 'r') as file:
+  data = sorted([int(i) for i in file.readlines()])
+
+def find_pair_sum(total, data):
+  for x in data:
+    y = total - x
+    if y in data:
+      return x, y
+  return None, None
+
+x, y = find_pair_sum(2020, data)
+print(f'Part 1: {x}*{y} = {x*y}')
+
+for idx, x in enumerate(data):
+  y, z = find_pair_sum(2020-x, data[idx+1:])
+  if y:
+    print(f'Part 2: {x}*{y}*{z} = {x*y*z}')
+    break
diff --git a/2020/day02.py b/2020/day02.py
new file mode 100644
index 0000000..00d7958
--- /dev/null
+++ b/2020/day02.py
@@ -0,0 +1,10 @@
+import re
+ex = re.compile(r'(\d+)-(\d+) (\w): (.*)')
+with open('input02', 'r') as file:
+  data = [ex.match(line).groups() for line in file.readlines()]
+
+valid = [(int(i)<=s.count(c)<=int(j)) for i,j,c,s in data]
+print(f'Part 1: {valid.count(True)}')
+
+valid2 = [(s[int(i)-1]==c)^(s[int(j)-1]==c) for i,j,c,s in data]  # This is fragile, beware inputs that may have indices out of range!
+print(f'Part 2: {valid2.count(True)}')
diff --git a/2020/input01 b/2020/input01
new file mode 100644
index 0000000..ad93f5e
--- /dev/null
+++ b/2020/input01
@@ -0,0 +1,200 @@
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diff --git a/2020/input02 b/2020/input02
new file mode 100644
index 0000000..7bd7054
--- /dev/null
+++ b/2020/input02
@@ -0,0 +1,1000 @@
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