composition of piecewise functions (jesus)

1 files changed, 56 insertions, 0 deletions

diff --git a/aoc_2023/day-05/part_1.ts b/aoc_2023/day-05/part_1.ts
new file mode 100644
index 0000000..bdbf05c
--- /dev/null
+++ b/aoc_2023/day-05/part_1.ts
@@ -0,0 +1,56 @@
+export const main = async (lines: string[]): Promise<number | string> => {
+  const maps: number[][][] = [];
+
+  const seeds = lines[0]
+    .split(":")
+    .at(1)!
+    .split(" ")
+    .filter((x) => x)
+    .map((x) => parseInt(x));
+
+  for (const line of lines.slice(1, lines.length)) {
+    if (!line) continue;
+
+    if (line.includes("to")) {
+      maps.push([]);
+      continue;
+    }
+    console.log(maps);
+
+    const currMap = maps.at(-1);
+    const [dest, source, range] = line.split(" ").map((x) => parseInt(x));
+    if (currMap) {
+      currMap.push([dest, source, range]);
+    }
+  }
+
+  let min = Math.pow(2, 32);
+  for (const seed of seeds) {
+    const location = maps.reduce((acc, map) => {
+      const [dest, source, _range] = map.find(
+        ([_dest, source, range]) => acc - source < range && acc - source >= 0
+      ) ?? [acc, acc];
+      return acc - source + dest;
+    }, seed);
+    min = Math.min(min, location);
+  }
+  return min;
+};
+
+//
+
+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);
+}