Year 2024, Day 1

Author: Schlauer-Hax

clients/typescript/solutions/S2401.ts

@@ -0,0 +1,25 @@
+import ISolution from "./ISolution.ts";
+
+export default class S2401 implements ISolution {
+  firstPart(input: string): (number | string) | Promise<number | string> {
+    const lists = input.split("\n").map(x => x.split("   ")).filter(x => x.length === 2);
+    const list1 = lists.map(x => Number(x[0])).sort();
+    const list2 = lists.map(x => Number(x[1])).sort();
+    let sum = 0;
+    for (let i = 0; i < list1.length; i++) {
+        sum += Math.abs(list1[i] - list2[i]);
+    }
+    return sum;
+  }
+  secondPart(input: string): (number | string) | Promise<number | string> {
+    const lists = input.split("\n").map(x => x.split("   ")).filter(x => x.length === 2);
+    const list1 = lists.map(x => Number(x[0]));
+    const list2 = lists.map(x => Number(x[1]));
+    let sum = 0;
+    for (const number of list1) {
+        sum += number*list2.filter(x => x === number).length;
+    }
+    return sum;
+  }
+
+}