init d11p2

Day11/Part2.js

@@ -0,0 +1,38 @@
+import { readFileSync } from "fs";
+const t0 = performance.now();
+
+const input = readFileSync("input.txt")
+	.toString()
+	.split(/\r*\n/)
+	.filter((e) => e.length > 0)
+	.map((e) => e.split(""));
+
+const expand = (arr) =>
+	arr.reduce(
+		(a, i) => [
+			...a,
+			...(i.some((e) => e !== ".") ? [i] : [i, Array(i.length).fill(".")]),
+		],
+		[]
+	);
+const flip = (current) =>
+	Array.from({ length: current[0].length }, (_, x) =>
+		Array.from({ length: current.length }, (_, y) => current[y][x])
+	);
+
+const universe = flip(expand(flip(expand(input))));
+const galaxies = universe
+	.map((a, y) => a.map((b, x) => ({ s: b, x, y })).filter((b) => b.s === "#"))
+	.filter((e) => e.length > 0)
+	.reduce((a, i) => [...a, ...i], []);
+const distances = galaxies.map((c, i) =>
+	galaxies.reduce(
+		(a, n, j) => a + (j > i ? Math.abs(c.x - n.x) + Math.abs(c.y - n.y) : 0),
+		0
+	)
+);
+const sum = distances.reduce((a, i) => a + i);
+console.log(sum);
+
+const t1 = performance.now();
+console.log(`Runtime: ${t1 - t0}ms`);