From 3ad70944bf284de2b84f673c18164a73db876602 Mon Sep 17 00:00:00 2001
From: Scott McKendry <39483124+scottmckendry@users.noreply.github.com>
Date: Wed, 30 Oct 2024 18:00:58 +1300
Subject: [PATCH] add day 2 solutions

---
 2021/02_test.odin  |   25 ++
 2021/02p1.odin     |   38 ++
 2021/02p2.odin     |   36 ++
 2021/inputs/02.txt | 1000 ++++++++++++++++++++++++++++++++++++++++++++
 2021/main.odin     |    2 +
 5 files changed, 1101 insertions(+)
 create mode 100644 2021/02_test.odin
 create mode 100644 2021/02p1.odin
 create mode 100644 2021/02p2.odin
 create mode 100644 2021/inputs/02.txt

diff --git a/2021/02_test.odin b/2021/02_test.odin
new file mode 100644
index 0000000..9b15039
--- /dev/null
+++ b/2021/02_test.odin
@@ -0,0 +1,25 @@
+package main
+
+import "core:fmt"
+import "core:mem"
+import "core:testing"
+
+@(test)
+d02p1 :: proc(t: ^testing.T) {
+	input: []string = {"forward 5", "down 5", "forward 8", "up 3", "down 8", "forward 2"}
+	got := parse_directions(input)
+	want := 150
+	testing.expect(t, got == want, fmt.aprintf("Got: %v | Want: %v", got, want))
+
+	free_all()
+}
+
+@(test)
+d02p2 :: proc(t: ^testing.T) {
+	input: []string = {"forward 5", "down 5", "forward 8", "up 3", "down 8", "forward 2"}
+	got := parse_submarine_instructions(input)
+	want := 900
+	testing.expect(t, got == want, fmt.aprintf("Got: %v | Want: %v", got, want))
+
+	free_all()
+}
diff --git a/2021/02p1.odin b/2021/02p1.odin
new file mode 100644
index 0000000..818ac1f
--- /dev/null
+++ b/2021/02p1.odin
@@ -0,0 +1,38 @@
+package main
+
+import "core:fmt"
+import "core:strconv"
+import "core:strings"
+import "utils"
+
+Coordinate :: struct {
+	x, y: int,
+}
+
+D02P1 :: proc() {
+	lines, backing := utils.read_lines("./inputs/02.txt")
+	defer delete(lines)
+	defer delete(backing)
+
+	depth_increase_count := parse_directions(lines)
+	fmt.printfln("Product of final position: %v", depth_increase_count)
+}
+
+parse_directions :: proc(input: []string) -> int {
+	pos := Coordinate{0, 0}
+	for instruc in input {
+		direction := strings.split(instruc, " ", context.temp_allocator)[0]
+		distance := strconv.atoi(strings.split(instruc, " ", context.temp_allocator)[1])
+
+		switch direction {
+		case "forward":
+			pos.x += distance
+		case "up":
+			pos.y -= distance
+		case "down":
+			pos.y += distance
+		}
+	}
+
+	return pos.x * pos.y
+}
diff --git a/2021/02p2.odin b/2021/02p2.odin
new file mode 100644
index 0000000..3291f2d
--- /dev/null
+++ b/2021/02p2.odin
@@ -0,0 +1,36 @@
+package main
+
+import "core:fmt"
+import "core:strconv"
+import "core:strings"
+import "utils"
+
+D02P2 :: proc() {
+	lines, backing := utils.read_lines("./inputs/02.txt")
+	defer delete(lines)
+	defer delete(backing)
+
+	depth_increase_count := parse_submarine_instructions(lines)
+	fmt.printfln("Product of final position: %v", depth_increase_count)
+}
+
+parse_submarine_instructions :: proc(input: []string) -> int {
+	pos := Coordinate{0, 0}
+    aim := 0
+	for instruc in input {
+		direction := strings.split(instruc, " ", context.temp_allocator)[0]
+		weight := strconv.atoi(strings.split(instruc, " ", context.temp_allocator)[1])
+
+		switch direction {
+		case "forward":
+			pos.x += weight
+            pos.y += aim * weight
+		case "up":
+			aim -= weight
+		case "down":
+			aim += weight
+		}
+	}
+
+	return pos.x * pos.y
+}
diff --git a/2021/inputs/02.txt b/2021/inputs/02.txt
new file mode 100644
index 0000000..ac80dd3
--- /dev/null
+++ b/2021/inputs/02.txt
@@ -0,0 +1,1000 @@
+forward 9
+down 9
+up 4
+down 5
+down 6
+up 6
+down 7
+down 1
+forward 6
+down 4
+forward 8
+up 5
+forward 9
+down 1
+down 4
+up 4
+up 5
+up 4
+down 1
+forward 8
+down 1
+forward 2
+forward 8
+down 9
+forward 2
+down 6
+down 2
+up 8
+down 6
+forward 9
+forward 7
+down 6
+forward 3
+down 2
+forward 4
+down 5
+up 2
+down 9
+down 8
+up 5
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+forward 4
+up 9
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+up 6
+forward 9
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+down 1
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+up 4
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+up 3
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+forward 6
+down 4
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+down 7
+down 5
+down 8
+down 5
+forward 1
+down 8
+down 2
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+down 3
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+forward 9
+down 1
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+down 1
+down 6
+down 7
+down 7
+forward 5
+forward 3
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+down 1
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+up 5
+up 9
+down 4
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+down 4
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+forward 6
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+down 3
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+up 9
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+down 6
+up 1
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+down 9
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+down 1
+down 7
+down 1
+up 6
+forward 2
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+forward 9
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+down 7
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+down 4
+forward 9
+down 7
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+down 5
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+down 8
+down 3
+down 9
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+forward 7
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+down 9
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+forward 2
+down 5
+up 4
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+down 8
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+forward 6
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+forward 2
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+down 8
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+forward 5
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+forward 6
diff --git a/2021/main.odin b/2021/main.odin
index 9984bfa..8ad3be6 100644
--- a/2021/main.odin
+++ b/2021/main.odin
@@ -13,6 +13,8 @@ year :: "2021"
 solutions: map[string]proc() = {
 	"01P1:Sonar Sweep" = D01P1,
 	"01P2:Sonar Sweep" = D01P2,
+	"O2P1:Dive!"       = D02P1,
+	"O2P2:Dive!"       = D02P2,
 }
 
 main :: proc() {