move into year directory

2023/5.1.ts

@@ -0,0 +1,57 @@
+import { open } from "node:fs/promises";
+
+const file = await open("./inputs/5");
+
+let input = (await file.readFile()).toString();
+
+const seedsRegex = /^(?:seeds: )(?<seeds>(?:\d+ ?)+)/gm;
+const seeds = seedsRegex
+  .exec(input)
+  ?.groups?.seeds?.split(" ")
+  .map((e) => Number(e));
+if (seeds === undefined) throw new Error("no");
+
+const mapsRegex =
+  /(?<from>\w+)-to-(?<to>\w+) map:\n(?<map>(?:\d+ \d+ \d+\n?)+)/g;
+
+const mappings: {
+  [key: string]: {
+    to: string;
+    value: Array<{ origin: number; destination: number; range: number }>;
+  };
+} = {};
+
+let match;
+while ((match = mapsRegex.exec(input)) !== null) {
+  if (match.groups === undefined) throw new Error("no2");
+  mappings[match.groups.from] = {
+    to: match.groups.to,
+    value: match.groups.map.split("\n").map((s) => {
+      const p = s.split(" ");
+      return {
+        origin: Number(p[1]),
+        destination: Number(p[0]),
+        range: Number(p[2]),
+      };
+    }),
+  };
+}
+
+const result = seeds.map((seed) => {
+  let c = seed;
+  let current = "seed";
+  while (current != "location") {
+    const map = mappings[current].value.find(
+      (e) => e.origin <= c && e.origin + e.range > c
+    );
+
+    if (map !== undefined) {
+      c = c - map.origin + map.destination;
+    }
+    current = mappings[current].to;
+  }
+  return c;
+});
+
+console.log(result);
+console.log(Math.min(...result));