feat(day-2): add part 1 solution

1 files changed, 52 insertions, 0 deletions

diff --git a/day-2/script.ts b/day-2/script.ts
new file mode 100644
index 0000000..4e29bbb
--- /dev/null
+++ b/day-2/script.ts
@@ -0,0 +1,52 @@
+import fs from "fs";
+
+const input = fs.readFileSync("./input.txt").toString();
+
+const COLORS = ["red", "green", "blue"] as const;
+type Color = (typeof COLORS)[number];
+
+type Draw = Record<Color, number>;
+
+interface Game {
+  id: number;
+  draws: Draw[];
+}
+
+function isPossible(
+  game: Game,
+  maxDraw: Draw = { red: 12, green: 13, blue: 14 },
+) {
+  return game.draws.reduce((acc, draw) => {
+    return (
+      acc &&
+      COLORS.every((color) => {
+        return draw[color] <= maxDraw[color];
+      })
+    );
+  }, true);
+}
+
+const result = input
+  .split("\n")
+  .slice(0, -1)
+  .map((line) => {
+    const [gameStr, drawsStr] = line.split(": ");
+    const id = Number(gameStr.slice("Game ".length));
+
+    const draws = drawsStr.split("; ").map((record) => {
+      const draws = record.split(", ").reduce(
+        (acc, draw) => {
+          const [number, color] = draw.split(" ");
+          acc[color] = Number(number);
+          return acc;
+        },
+        { red: 0, green: 0, blue: 0 },
+      );
+      return draws;
+    });
+    return { id, draws };
+  })
+  .filter((game) => isPossible(game))
+  .reduce((acc, game) => acc + game.id, 0);
+
+console.log({ result });