32 lines
866 B
TypeScript
32 lines
866 B
TypeScript
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export async function readInputData(path: string): Promise<number[]> {
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const data = await Deno.readTextFile(path);
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return data.trim().split(" ").map((x) => parseInt(x));
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}
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export function step(k: number): [number, number] | number {
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if (k === 0) return 1;
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const str = k.toString();
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if (str.length % 2 === 0) {
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return [
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parseInt(str.slice(0, str.length / 2)),
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parseInt(str.slice(str.length / 2)),
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];
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}
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return k * 2024;
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}
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if (import.meta.main) {
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const input = await readInputData("input.txt");
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console.log(input);
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let data = input;
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for (let i = 0; i < 25; i++) {
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data = data.flatMap(step);
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}
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console.log(data.length);
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// let input = [125, 17]
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// for (let i = 0; i < 6; i++) {
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// input = input.flatMap(step);
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// console.log(input);
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// }
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}
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