this repo has no description
part 2 done!
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2023/day06/part2.ts
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2023/day06/part2.ts
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import { assert } from "https://deno.land/std@0.208.0/assert/assert.ts";
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if (import.meta.main) {
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const input = (
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await Deno.readFile("input").then((bytes) =>
···
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}
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export function answer(input: string): number {
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console.log(input);
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return 42;
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const [raceDuration, record] = input
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.split("\n")
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.map((l) => parseInt(l.split(/\s+/).slice(1).join("")));
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const [min, max] = minMaxHoldsToWin(raceDuration, record);
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return max - min + 1;
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}
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function minMaxHoldsToWin(
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raceDuration: number,
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record: number,
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): [number, number] {
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let min = 0;
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let max = 0;
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for (let hold = 0; hold < raceDuration; hold++) {
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const distance = hold * (raceDuration - hold);
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if (min === 0 && distance > record) min = hold;
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if (min !== 0 && distance > record) max = hold;
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if (min !== 0 && max !== 0 && distance < record) break;
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}
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return [min, max];
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}
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2023/day06/puzzle.md
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2023/day06/puzzle.md
···
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Determine the number of ways you could beat the record in each race. *What do you get if you multiply these numbers together?*
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To begin, [get your puzzle input](6/input).
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Your puzzle answer was `114400`.
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The first half of this puzzle is complete! It provides one gold star: \*
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\--- Part Two ---
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----------
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As the race is about to start, you realize the piece of paper with race times and record distances you got earlier actually just has very bad [kerning](https://en.wikipedia.org/wiki/Kerning). There's really *only one race* - ignore the spaces between the numbers on each line.
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So, the example from before:
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```
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Time: 7 15 30
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Distance: 9 40 200
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```
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...now instead means this:
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```
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Time: 71530
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Distance: 940200
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```
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Now, you have to figure out how many ways there are to win this single race. In this example, the race lasts for *`71530` milliseconds* and the record distance you need to beat is *`940200` millimeters*. You could hold the button anywhere from `14` to `71516` milliseconds and beat the record, a total of `*71503*` ways!
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*How many ways can you beat the record in this one much longer race?*
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Answer:
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You can also [Shareon [Twitter](https://twitter.com/intent/tweet?text=%22Wait+For+It%22+%2D+Day+6+%2D+Advent+of+Code+2023&url=https%3A%2F%2Fadventofcode%2Ecom%2F2023%2Fday%2F6&related=ericwastl&hashtags=AdventOfCode) [Mastodon](javascript:void(0);)] this puzzle.
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Although it hasn't changed, you can still [get your puzzle input](6/input).
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You can also [Shareon [Twitter](https://twitter.com/intent/tweet?text=I%27ve+completed+Part+One+of+%22Wait+For+It%22+%2D+Day+6+%2D+Advent+of+Code+2023&url=https%3A%2F%2Fadventofcode%2Ecom%2F2023%2Fday%2F6&related=ericwastl&hashtags=AdventOfCode) [Mastodon](javascript:void(0);)] this puzzle.
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2023/day06/test.ts
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2023/day06/test.ts