2025 day 9 part 1 in TypeScript

2025/day09/solve.ts

@@ -0,0 +1,39 @@
+#!/usr/bin/env ts-node
+import * as fs from 'fs';
+import { exit } from 'process';
+
+if (process.argv.length < 3) {
+    console.log("Usage: " + process.argv0 + " " + process.argv[1] + " INPUT_FILE");
+    exit(10);
+}
+
+const input_file = fs.readFileSync(process.argv[2], "utf-8");
+const lines = input_file.trim().split("\n");
+
+class Point {
+    x: number;
+    y: number;
+
+    constructor(x: number, y: number) {
+        this.x = x;
+        this.y = y;
+    }
+}
+
+const points = lines.map(line => {
+    const [x, y] = line.split(",");
+    return new Point(+x, +y);
+});
+
+let max_size = 0;
+
+for (let i = 0; i < points.length; ++i) {
+    for (let j = i + 1; j < points.length; ++j) {
+        const width = Math.abs(points[i].x - points[j].x) + 1;
+        const height = Math.abs(points[i].y - points[j].y) + 1;
+
+        max_size = Math.max(max_size, width * height);
+    }
+}
+
+console.log("Part 1:", max_size);