From 72724bb3a507465b8f1df65eeb6a3bee62549705 Mon Sep 17 00:00:00 2001
From: Tomasz Kramkowski <tk@the-tk.com>
Date: Thu, 2 Dec 2021 17:28:01 +0000
Subject: day 2

---
 2.py | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 2.py

(limited to '2.py')

diff --git a/2.py b/2.py
new file mode 100644
index 0000000..618cd86
--- /dev/null
+++ b/2.py
@@ -0,0 +1,28 @@
+Command = tuple[str, int]
+
+def part1(commands: list[Command]) -> int:
+    pos: int = 0
+    depth: int = 0
+    for command in commands:
+        match command:
+            case ('up',      X): depth -= X
+            case ('down',    X): depth += X
+            case ('forward', X): pos += X
+    return pos * depth
+
+def part2(commands: list[Command]) -> int:
+    pos: int = 0
+    aim: int = 0
+    depth: int = 0
+    for command in commands:
+        match command:
+            case ('up',      X): aim -= X
+            case ('down',    X): aim += X
+            case ('forward', X):
+                pos += X
+                depth += aim * X
+    return pos * depth
+
+commands: list[Command] = [(c, int(q)) for c, q in (l.split() for l in open('2.in'))]
+print(part1(commands))
+print(part2(commands))
-- 
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