add Day2

Day2/Submarine.ts

@@ -0,0 +1,61 @@
+import { readLines } from "https://deno.land/std@0.177.1/io/read_lines.ts";
+
+async function Part1() {
+    const file = await Deno.open("./Day2/input.txt");
+
+    let depth = 0;
+    let position = 0;
+
+    for await (const line of readLines(file)) {
+        const commands = line.split(" ");
+        switch(commands[0]) {
+            case "forward": {
+                position += +commands[1];
+                break;
+            }
+            case "down": {
+                depth += +commands[1];
+                break;
+            }
+            case "up": {
+                depth -= +commands[1];
+                break;
+            }
+        }
+    }
+
+    return position * depth;
+}
+
+async function Part2() {
+    const file = await Deno.open("./Day2/input.txt");
+
+    let depth = 0;
+    let position = 0;
+    let aim = 0;
+
+    for await (const line of readLines(file)) {
+        const commands = line.split(" ");
+        switch(commands[0]) {
+            case "forward": {
+                position += +commands[1];
+                depth += aim * +commands[1];
+                break;
+            }
+            case "down": {
+                aim += +commands[1];
+                break;
+            }
+            case "up": {
+                aim -= +commands[1];
+                break;
+            }
+        }
+    }
+
+    return position * depth;
+}
+
+console.log("Part1: " + await Part1());
+
+console.log("Part1: " + await Part2());