From f4b4845e3853fb12c6ffc7d88d820de405d9a928 Mon Sep 17 00:00:00 2001
From: Andrew Lalis <andrewlalisofficial@gmail.com>
Date: Thu, 2 Dec 2021 14:29:16 +0100
Subject: [PATCH] Added day 2.

---
 source/app.d          |    3 +-
 source/day2/input.txt | 1000 +++++++++++++++++++++++++++++++++++++++++
 source/day2/part1.d   |   44 ++
 3 files changed, 1046 insertions(+), 1 deletion(-)
 create mode 100644 source/day2/input.txt
 create mode 100644 source/day2/part1.d

diff --git a/source/app.d b/source/app.d
index b03f9df..f872ae5 100644
--- a/source/app.d
+++ b/source/app.d
@@ -2,7 +2,8 @@ import std.stdio;
 
 import day1.part1;
 import day1.part2;
+import day2.part1;
 
 void main() {
-	slidingSum();
+	dive2();
 }
diff --git a/source/day2/input.txt b/source/day2/input.txt
new file mode 100644
index 0000000..171b7da
--- /dev/null
+++ b/source/day2/input.txt
@@ -0,0 +1,1000 @@
+forward 6
+down 8
+down 5
+down 9
+forward 2
+down 5
+down 5
+forward 1
+forward 7
+down 8
+up 2
+down 4
+up 8
+down 8
+forward 3
+forward 4
+down 1
+forward 5
+up 7
+down 7
+down 8
+forward 2
+up 3
+forward 1
+forward 6
+forward 9
+forward 7
+forward 8
+forward 2
+forward 3
+up 2
+up 8
+down 1
+forward 7
+down 7
+down 2
+forward 6
+down 1
+forward 5
+down 3
+forward 6
+down 7
+up 1
+up 3
+forward 7
+forward 6
+forward 8
+down 4
+down 2
+up 5
+down 2
+forward 2
+up 5
+forward 6
+down 3
+down 1
+down 5
+forward 6
+up 6
+down 7
+down 8
+down 2
+forward 3
+down 5
+down 4
+forward 7
+forward 9
+up 9
+up 8
+up 4
+forward 8
+forward 5
+down 4
+up 2
+forward 9
+up 5
+down 5
+up 9
+forward 2
+forward 3
+down 6
+down 8
+forward 8
+up 5
+down 5
+forward 7
+forward 6
+forward 8
+up 3
+forward 3
+forward 1
+up 8
+down 8
+down 2
+down 4
+up 7
+up 2
+up 9
+up 4
+forward 6
+down 8
+down 1
+forward 6
+forward 6
+down 4
+down 2
+up 7
+down 9
+down 9
+up 2
+up 7
+down 4
+down 2
+forward 1
+down 1
+up 5
+up 5
+forward 9
+up 3
+down 7
+forward 7
+down 4
+down 8
+up 1
+down 4
+down 7
+forward 5
+up 9
+forward 5
+forward 1
+forward 8
+forward 6
+forward 5
+forward 1
+down 4
+down 6
+forward 5
+forward 2
+forward 3
+down 1
+up 2
+up 9
+forward 4
+up 8
+down 7
+down 8
+up 7
+down 2
+forward 7
+up 1
+forward 5
+forward 1
+forward 8
+forward 1
+up 8
+down 6
+down 7
+forward 2
+down 8
+down 8
+forward 8
+up 8
+down 6
+down 7
+down 4
+down 7
+forward 6
+up 3
+forward 3
+down 2
+down 8
+down 3
+down 9
+forward 9
+forward 7
+down 6
+down 4
+forward 6
+down 2
+down 7
+up 7
+up 8
+forward 2
+forward 8
+down 3
+up 2
+forward 9
+down 2
+up 3
+down 1
+down 1
+down 4
+down 8
+up 2
+up 8
+forward 2
+forward 1
+up 1
+forward 7
+down 8
+down 1
+down 7
+up 3
+down 3
+forward 8
+forward 2
+forward 7
+down 2
+up 9
+up 3
+up 5
+down 4
+up 3
+forward 4
+up 5
+down 9
+down 9
+forward 2
+forward 2
+down 2
+down 8
+down 3
+down 5
+forward 6
+down 6
+up 5
+down 2
+down 4
+down 9
+down 3
+forward 7
+down 1
+forward 1
+down 4
+up 1
+down 9
+forward 5
+up 2
+down 3
+forward 8
+forward 9
+up 9
+down 2
+forward 8
+down 4
+down 5
+forward 6
+forward 5
+forward 4
+down 6
+down 9
+down 2
+forward 9
+down 4
+up 8
+up 9
+up 2
+up 5
+up 5
+forward 9
+up 1
+forward 6
+forward 7
+forward 8
+forward 9
+up 2
+forward 3
+forward 4
+forward 6
+forward 9
+up 5
+up 5
+down 3
+forward 1
+forward 3
+forward 2
+forward 3
+forward 6
+forward 7
+down 4
+down 2
+down 1
+forward 2
+down 5
+forward 3
+forward 6
+down 8
+down 9
+forward 4
+forward 6
+down 6
+down 6
+forward 3
+down 6
+down 8
+down 1
+forward 7
+forward 9
+down 2
+down 5
+forward 1
+forward 3
+down 2
+forward 1
+down 8
+down 1
+forward 4
+down 8
+forward 5
+forward 1
+down 7
+down 7
+forward 3
+forward 1
+forward 6
+forward 7
+forward 5
+up 1
+forward 2
+down 9
+forward 3
+up 1
+forward 2
+down 1
+down 6
+down 3
+forward 7
+down 5
+down 4
+down 1
+forward 9
+forward 9
+down 5
+forward 7
+forward 3
+forward 5
+down 1
+forward 6
+down 8
+up 2
+forward 6
+down 3
+forward 2
+forward 9
+forward 4
+down 1
+down 3
+forward 9
+forward 3
+forward 8
+forward 9
+up 3
+up 1
+forward 1
+forward 2
+down 8
+down 9
+down 2
+down 1
+down 3
+down 2
+forward 9
+forward 7
+down 5
+forward 1
+forward 6
+forward 3
+forward 9
+down 2
+forward 8
+down 5
+down 1
+forward 5
+forward 3
+down 6
+forward 6
+down 8
+forward 2
+up 5
+forward 1
+down 2
+down 6
+forward 9
+forward 7
+down 1
+down 3
+down 6
+up 3
+down 4
+forward 8
+forward 1
+forward 7
+down 2
+down 5
+down 9
+forward 6
+down 5
+forward 5
+up 1
+down 5
+forward 8
+up 9
+forward 2
+down 6
+forward 2
+forward 7
+up 2
+down 9
+down 7
+up 7
+down 6
+up 5
+forward 1
+down 8
+forward 8
+forward 1
+forward 7
+down 9
+down 6
+forward 3
+down 6
+down 1
+down 1
+down 1
+down 3
+down 7
+down 7
+down 3
+down 5
+forward 4
+down 4
+forward 7
+forward 5
+down 9
+down 9
+forward 7
+down 3
+down 9
+down 4
+forward 3
+down 7
+down 2
+forward 2
+down 6
+forward 9
+forward 9
+forward 5
+up 4
+down 7
+down 2
+up 9
+up 4
+forward 8
+forward 1
+down 8
+up 5
+down 4
+down 3
+forward 2
+down 7
+down 2
+down 1
+down 9
+forward 7
+forward 7
+up 8
+up 4
+down 3
+down 8
+forward 6
+forward 5
+forward 5
+forward 5
+down 3
+down 8
+forward 4
+forward 7
+forward 1
+up 3
+up 9
+down 6
+up 4
+down 7
+forward 8
+forward 4
+forward 3
+up 8
+up 3
+down 3
+forward 6
+down 2
+forward 7
+forward 4
+forward 8
+down 3
+down 9
+down 9
+down 2
+forward 8
+up 4
+down 3
+forward 8
+forward 5
+forward 7
+down 6
+up 9
+forward 3
+down 2
+forward 5
+forward 2
+down 7
+forward 6
+forward 2
+up 9
+down 1
+down 1
+forward 4
+up 1
+forward 9
+down 3
+down 4
+down 2
+forward 3
+forward 3
+forward 3
+up 7
+up 8
+down 5
+forward 1
+forward 7
+up 9
+up 3
+down 3
+down 8
+forward 6
+up 5
+up 5
+forward 4
+down 2
+down 8
+down 1
+forward 6
+down 3
+forward 3
+forward 6
+forward 1
+up 3
+up 1
+down 5
+down 2
+down 7
+down 1
+forward 9
+down 4
+down 8
+forward 9
+forward 7
+forward 8
+down 1
+down 2
+up 7
+down 5
+down 2
+down 1
+up 4
+up 8
+up 7
+down 4
+forward 3
+down 2
+down 2
+forward 5
+forward 4
+down 8
+up 4
+forward 4
+up 1
+down 3
+down 9
+down 9
+down 3
+up 8
+forward 1
+forward 6
+down 6
+down 2
+forward 8
+down 3
+forward 8
+forward 2
+forward 9
+up 3
+forward 6
+down 5
+forward 6
+forward 2
+up 7
+down 9
+forward 2
+up 2
+forward 7
+down 1
+down 5
+down 6
+forward 8
+down 6
+forward 4
+forward 1
+forward 3
+forward 4
+up 4
+forward 4
+down 4
+forward 2
+forward 5
+forward 2
+forward 5
+down 9
+up 2
+up 1
+down 2
+up 4
+up 5
+forward 2
+down 3
+down 9
+forward 3
+down 8
+down 9
+forward 5
+down 3
+forward 5
+down 3
+up 8
+forward 7
+forward 1
+down 2
+down 7
+forward 3
+down 8
+forward 9
+down 4
+down 1
+down 7
+down 4
+up 5
+forward 1
+down 4
+forward 1
+forward 8
+up 1
+up 5
+up 2
+up 2
+down 4
+down 7
+forward 2
+down 8
+up 8
+down 9
+down 3
+down 6
+down 3
+down 1
+forward 7
+up 8
+forward 5
+up 5
+down 8
+down 1
+down 8
+down 6
+down 5
+forward 2
+up 5
+down 6
+forward 9
+up 6
+down 5
+down 7
+up 9
+down 1
+forward 4
+up 6
+forward 2
+down 5
+down 5
+forward 2
+up 6
+forward 1
+down 8
+forward 4
+up 8
+down 3
+forward 8
+down 8
+forward 5
+down 6
+down 3
+forward 1
+down 4
+down 8
+up 1
+down 1
+down 2
+up 9
+forward 2
+forward 3
+down 7
+down 2
+forward 7
+up 8
+down 2
+down 8
+down 9
+up 1
+down 5
+down 5
+down 4
+down 8
+down 9
+up 5
+forward 2
+down 4
+down 3
+down 2
+forward 5
+forward 8
+down 8
+down 1
+forward 9
+down 5
+forward 5
+down 2
+up 3
+up 9
+down 1
+down 9
+forward 7
+up 7
+forward 3
+up 6
+forward 8
+down 2
+down 1
+down 7
+forward 5
+down 8
+down 4
+forward 7
+forward 4
+down 6
+forward 9
+down 3
+forward 2
+down 3
+down 1
+down 1
+up 1
+up 3
+down 6
+forward 3
+up 9
+down 4
+up 2
+down 3
+up 1
+down 8
+down 5
+forward 7
+forward 2
+forward 9
+down 8
+down 5
+down 6
+up 3
+forward 2
+up 8
+down 4
+forward 7
+down 8
+down 6
+down 4
+forward 7
+up 9
+down 4
+forward 2
+forward 5
+down 3
+up 6
+up 6
+down 2
+down 4
+forward 8
+forward 5
+forward 3
+forward 5
+down 5
+down 5
+down 6
+forward 3
+forward 7
+forward 1
+down 8
+down 5
+forward 7
+up 7
+down 9
+down 9
+down 9
+up 6
+down 2
+down 3
+forward 1
+up 7
+up 8
+forward 5
+down 1
+down 3
+down 3
+forward 5
+down 7
+down 1
+up 2
+down 2
+down 3
+forward 7
+down 9
+forward 6
+down 5
+forward 2
+down 5
+forward 6
+up 3
+down 8
+up 2
+forward 5
+forward 1
+forward 5
+forward 8
+forward 6
+forward 9
+forward 6
+up 6
+up 5
+down 8
+down 3
+down 5
+down 2
+forward 9
+forward 8
+down 1
+up 1
+up 6
+down 6
+forward 4
+down 3
+forward 6
+forward 1
+up 5
+down 6
+up 9
+down 7
+down 2
+down 9
+down 5
+forward 5
+up 2
+forward 8
+down 2
+down 8
+forward 6
+down 4
+forward 8
+down 7
+down 8
+down 1
+forward 3
+down 6
+down 9
+down 3
+forward 3
+down 8
+forward 8
+down 7
+forward 6
+forward 8
+down 8
+up 7
+down 1
+forward 2
+forward 3
+down 5
+up 8
+down 3
+down 4
+down 7
+forward 9
+forward 7
+forward 1
+down 3
+forward 9
+down 8
+forward 2
+down 2
+down 9
+down 4
+down 3
+up 6
+up 9
+down 3
+down 2
+forward 5
+down 3
+down 2
+down 8
+forward 6
+forward 5
+up 4
+forward 9
+forward 8
+forward 9
+down 2
+forward 2
+up 6
+forward 1
+down 5
+forward 2
+down 8
+up 2
+up 3
+down 3
+up 2
+up 1
+up 5
+forward 1
+forward 2
+down 8
+up 3
+down 9
+forward 7
+up 5
+down 4
+down 4
+up 3
+forward 2
+up 5
+down 4
+down 4
+up 5
+forward 8
+down 8
+down 6
+forward 7
+down 1
+down 3
+down 1
+forward 3
+down 5
+down 3
+forward 3
+up 2
+forward 2
+down 9
+up 8
+forward 8
+up 8
+forward 1
+forward 9
+forward 3
+down 8
+down 3
+forward 8
+forward 4
+down 2
+forward 2
+down 2
+down 5
+down 7
+down 5
+forward 8
+up 3
+forward 1
+down 1
+forward 3
+down 9
+forward 2
+forward 2
+forward 7
+down 7
+down 2
+forward 9
+up 5
+up 7
+forward 8
+forward 1
+down 7
+down 8
+down 3
+forward 6
diff --git a/source/day2/part1.d b/source/day2/part1.d
new file mode 100644
index 0000000..fc0caad
--- /dev/null
+++ b/source/day2/part1.d
@@ -0,0 +1,44 @@
+module day2.part1;
+
+import std.file;
+import std.stdio;
+import std.string;
+import std.conv;
+import std.typecons;
+
+Tuple!(string, int) parseOp(char[] op) {
+    auto parts = op.split();
+    int x = parts[1].to!int;
+    string d = parts[0].to!string;
+    return tuple(d, x);
+}
+
+void dive() {
+    File f = File("source/day2/input.txt", "r");
+    int depth = 0;
+    int position = 0;
+    foreach (line; f.byLine) {
+        auto op = parseOp(line);
+        if (op[0] == "up") depth -= op[1];
+        if (op[0] == "down") depth += op[1];
+        if (op[0] == "forward") position += op[1];
+    }
+    writefln("Final depth: %d, Final position: %d, Product: %d", depth, position, depth * position);
+}
+
+void dive2() {
+    File f = File("source/day2/input.txt", "r");
+    int aim = 0;
+    int depth = 0;
+    int position = 0;
+    foreach (line; f.byLine) {
+        auto op = parseOp(line);
+        if (op[0] == "up") aim -= op[1];
+        if (op[0] == "down") aim += op[1];
+        if (op[0] == "forward") {
+            position += op[1];
+            depth += aim * op[1];
+        }
+    }
+    writefln("Final depth: %d, Final position: %d, Product: %d", depth, position, depth * position);
+}