add day 2 solutions

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()
+}

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
+}

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
+}