commit fbfecad0ba78eaa0f6ae99bd9ea8665e5d5b5c7e · dunkirk.sh/aoc-2025

+46 -11

ts/01/index.ts

···

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       const file = await Bun.file("./input.txt").text();

     

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       let dial = 50;

     

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       let count = 0;

     

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       (() => {

     

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       	let dial = 50;

     

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       	let count = 0;

     

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       	file.split("\n").forEach((line) => {

     

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       		const dir = line.startsWith("R"); // false is left

     

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       		const num = Number.parseInt(line.substring(1), 10);

     

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       		if (dir) dial += num;

     

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       		else dial -= num;

     

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       		dial %= 100;

     

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       		if (dial === 0) count++;

     

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       	});

     

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       	console.log(`part 1: ${count}`);

     

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       })();

     

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       (() => {

     

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       	let dial = 50;

     

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       	let count = 0;

     

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       	file.split("\n").forEach((line) => {

     

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       		line = line.trim();

     

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       		const dir = line[0]; // false is left

     

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       		const num = Number.parseInt(line.substring(1), 10);

     

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       		const dialBefore = dial;

     

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       file.split("\n").forEach((line) => {

     

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       	const dir = line.startsWith("R"); // false is left

     

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       	const num = Number.parseInt(line.substring(1), 10);

     

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       		let distToZero: number;

     

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       		if (dir === "R") {

     

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       			distToZero = (100 - dialBefore) % 100;

     

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       		} else {

     

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       			distToZero = dialBefore % 100;

     

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       		}

     

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       	if (dir) dial -= num;

     

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       	else dial += num;

     

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       		if (distToZero === 0) distToZero = 100;

     

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       	dial %= 100;

     

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       		if (num >= distToZero) {

     

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       			count += 1 + Math.floor((num - distToZero) / 100);

     

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       		}

     

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       	if (dial === 0) count++;

     

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       });

     

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       		if (dir === "R") dial = (dialBefore + num) % 100;

     

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       		else dial = (100 + dialBefore - (num % 100)) % 100;

     

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       		dial = (100 + dial) % 100;

     

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       	});

     

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       console.log(`part 1: ${count}`);

     

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       	console.log(`part 2: ${count}`);

     

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       })();

+10

ts/01/test_input.txt