feat(day-5): add first part solution

1 files changed, 37 insertions, 0 deletions

diff --git a/day-5/script.ts b/day-5/script.ts
new file mode 100644
index 0000000..2d18477
--- /dev/null
+++ b/day-5/script.ts
@@ -0,0 +1,37 @@
+import fs from "fs";
+
+const input = fs.readFileSync("./input.txt").toString();
+
+const [seedStr, ...mapStrings] = input.split("\n\n");
+
+const seeds = seedStr.match(/\d+/g)?.map(Number) || [];
+
+const maps = mapStrings.map((mapString) =>
+  mapString
+    .split("\n")
+    .slice(1)
+    .filter((x) => x.length)
+    .map((s) => s.match(/\d+/g)?.map(Number) || [])
+    .map(([destinationStart, sourceStart, rangeSize]) => ({
+      sourceStart,
+      destinationStart,
+      rangeSize,
+    })),
+);
+
+const locationNumbers = seeds.map((seed) =>
+  maps.reduce((currentNumber, mapRules) => {
+    const validRule = mapRules.find(
+      (rule) =>
+        currentNumber >= rule.sourceStart &&
+        currentNumber < rule.sourceStart + rule.rangeSize,
+    );
+
+    if (!validRule) return currentNumber;
+    return currentNumber - validRule.sourceStart + validRule.destinationStart;
+  }, seed),
+);
+
+const result = locationNumbers.reduce((acc, x) => Math.min(acc, x), Infinity);
+
+console.log({ result });