1 files changed, 59 insertions, 0 deletions
diff --git a/aoc_2022/day-10/part_2.ts b/aoc_2022/day-10/part_2.ts
new file mode 100644
index 0000000..700ad19
--- /dev/null
+++ b/aoc_2022/day-10/part_2.ts
@@ -0,0 +1,59 @@
+const cycles = (instruction: string): number => {
+  if (instruction === "noop") return 1;
+  if (instruction === "addx") return 2;
+  return 0;
+};
+
+export const main = async (lines: string[]): Promise<number | string> => {
+  const instructions = lines.map((line) => line.split(" "));
+  let signalStrength = 0;
+  let cycle = 0;
+  const registers = { x: 1 };
+  const dim = { width: 40, height: 6 };
+
+  const crt = Array(dim.width * dim.height).fill("");
+
+  for (const [instruction, operand] of instructions) {
+    const instCycles = cycles(instruction);
+    for (let i = 0; i < instCycles; i++) {
+      const crtx = cycle % dim.width;
+      crt[cycle] = [registers.x - 1, registers.x, registers.x + 1].includes(
+        crtx
+      )
+        ? "#"
+        : ".";
+
+      cycle++;
+      if (cycle >= 20 && (cycle - 20) % 40 === 0) {
+        signalStrength += registers.x * cycle;
+      }
+    }
+
+    if (instruction === "addx") {
+      registers.x += parseInt(operand);
+    }
+  }
+
+  return Array(dim.height)
+    .fill(null)
+    .map((_, i) => crt.slice(dim.width * i, dim.width * (i + 1)).join(""))
+    .join("\n");
+};
+
+//
+
+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);
+}