1 files changed, 30 insertions, 0 deletions
diff --git a/aoc_2021/day-01/part_2.ts b/aoc_2021/day-01/part_2.ts
new file mode 100644
index 0000000..492b68c
--- /dev/null
+++ b/aoc_2021/day-01/part_2.ts
@@ -0,0 +1,30 @@
+export const main = async (lines: string[]): Promise<number | string> => {
+  return lines
+    .map((x) => Number(x))
+    .map((_num, i, arr) => {
+      if (i > arr.length - 3) return -1;
+      return arr.slice(i, i + 3).reduce((acc, x) => acc + x, 0);
+    })
+    .map((num, i, arr) => {
+      return i > 0 && arr[i - 1] < num;
+    })
+    .filter((x) => x).length;
+};
+
+//
+
+const isrun = process.argv.length > 1 && process.argv[1] === import.meta.path;
+if (isrun) {
+  const file = Bun.file("./problem.txt");
+  const text = await file.text();
+  const lines = text.split("\n");
+
+  console.log("=== COMPUTATION ===\n");
+
+  const answer = await main(lines);
+
+  console.log("\n=== /COMPUTATION ===\n");
+
+  console.log("=== ANSWER TO P2 ===");
+  console.log(answer);
+}