1 files changed, 38 insertions, 0 deletions
diff --git a/2022/18-Boiling-Boulders/first.js b/2022/18-Boiling-Boulders/first.js
new file mode 100644
index 0000000..7cd43d0
--- /dev/null
+++ b/2022/18-Boiling-Boulders/first.js
@@ -0,0 +1,38 @@
+import * as fs from "fs";
+
+function load(filename) {
+	return fs.readFileSync(filename, "utf8")
+		.trim()
+		.split("\n");
+}
+
+let example = load("example");
+let input = load("input");
+
+function countSides(cube, input) {
+	let [x, y, z] = cube.split(",").map(n => parseInt(n));
+	let count = 6;
+	if (input.includes([x+1, y, z].join(","))) count--;
+	if (input.includes([x-1, y, z].join(","))) count--;
+	if (input.includes([x, y+1, z].join(","))) count--;
+	if (input.includes([x, y-1, z].join(","))) count--;
+	if (input.includes([x, y, z+1].join(","))) count--;
+	if (input.includes([x, y, z-1].join(","))) count--;
+	return count;
+}
+
+function solve(input) {
+	let count = 0;
+	input.forEach(cube => {
+		count += countSides(cube, input);
+	});
+	return count;
+}
+
+const exampleOutput = solve(example);
+if (exampleOutput !== 64) {
+	console.log("Example failed with " + exampleOutput);
+	process.exit(1); // eslint-disable-line
+}
+
+console.log(solve(input));