day 2

1 files changed, 50 insertions, 0 deletions

diff --git a/aoc_2023/day-02/part_1.ts b/aoc_2023/day-02/part_1.ts
new file mode 100644
index 0000000..dae0834
--- /dev/null
+++ b/aoc_2023/day-02/part_1.ts
@@ -0,0 +1,50 @@
+export const main = async (lines: string[]): Promise<number | string> => {
+  const colors = new Map<string, number>([
+    ["red", 12],
+    ["green", 13],
+    ["blue", 14],
+  ]);
+
+  const games = lines
+    .filter((x) => x)
+    .map((line) => line.split(":").at(-1) as string)
+    .map((line) => line.split(";").map((x) => x.trim()));
+
+  const unplayableGames = new Set<number>();
+
+  for (let i = 0; i < games.length; i++) {
+    const game = games[i];
+    for (const play of game) {
+      const sets = play.split(",").map((x) => x.trim());
+      for (const [num, color] of sets.map((s) => s.split(" "))) {
+        const totalColors = colors.get(color) ?? 0;
+        if (parseInt(num) > totalColors) {
+          unplayableGames.add(i + 1);
+        }
+      }
+    }
+  }
+
+  const n = games.length;
+  const perfect = (n * (n + 1)) / 2;
+
+  return perfect - Array.from(unplayableGames).reduce((acc, x) => acc + x, 0);
+};
+
+//
+
+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 P1 ===");
+  console.log(answer);
+}