1 files changed, 79 insertions, 0 deletions
diff --git a/aoc_2023/day-03/part_1.ts b/aoc_2023/day-03/part_1.ts
new file mode 100644
index 0000000..33a8107
--- /dev/null
+++ b/aoc_2023/day-03/part_1.ts
@@ -0,0 +1,79 @@
+import { JSONSet, Vec2 } from "@/utils";
+
+const isNumeric = (symbol: string) => symbol <= "9" && symbol >= "0";
+
+export const main = async (lines: string[]): Promise<number | string> => {
+  const adjacentPoints: Vec2[] = [];
+
+  const dimy = lines.length;
+  for (let y = 0; y < lines.length; y++) {
+    const dimx = lines[y].length;
+    for (let x = 0; x < dimx; x++) {
+      const symbol = lines[y][x];
+      if (symbol != "." && !isNumeric(symbol)) {
+        for (let dy = -1; dy <= 1; dy++) {
+          for (let dx = -1; dx <= 1; dx++) {
+            const newX = dx + x;
+            const newY = dy + y;
+            if (
+              !(dy === dx && dy === 0) &&
+              newX >= 0 &&
+              newX < dimx &&
+              newY < dimy &&
+              newY >= 0
+            ) {
+              adjacentPoints.push({ x: x + dx, y: y + dy });
+            }
+          }
+        }
+      }
+    }
+  }
+
+  let sum = 0;
+  const visitedPoints: JSONSet<Vec2> = new JSONSet();
+  for (const { x, y } of adjacentPoints) {
+    const symbol = lines[y][x];
+    if (!isNumeric(symbol)) continue;
+
+    let num = "";
+    if (!visitedPoints.has({ x, y })) {
+      let x_i = x;
+      while (x_i >= 0 && isNumeric(lines[y][x_i])) {
+        x_i--;
+      }
+      x_i = Math.max(0, x_i + 1);
+
+      while (x_i < lines[y].length && isNumeric(lines[y][x_i])) {
+        num += lines[y][x_i];
+        visitedPoints.add({ x: x_i, y });
+
+        x_i++;
+      }
+    }
+
+    if (num.trim() !== "") {
+      sum += parseInt(num.trim());
+    }
+  }
+
+  return sum;
+};
+
+//
+
+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").filter((x) => x && x.length);
+
+  console.log("=== COMPUTATION ===\n");
+
+  const answer = await main(lines);
+
+  console.log("\n=== /COMPUTATION ===\n");
+
+  console.log("=== ANSWER TO P1 ===");
+  console.log(answer);
+}