33 lines
1,006 B
TypeScript
33 lines
1,006 B
TypeScript
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import { collectArray, inputLines, measureDuration } from "./common.ts";
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const input = await collectArray(await inputLines("3"));
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type SubmarineCommand = ["forward", number] | ["up", number] | ["down", number];
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const ASCII_ZERO = "0".charCodeAt(0);
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export function part1(input: string[]): number {
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const width = input[0].length;
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const counter = Array.from(Array(width), (_) => [0, 0]);
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for (const l of input) {
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for (let i = 0; i < width; i++) {
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const val = l.charCodeAt(i) - ASCII_ZERO;
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counter[i][val]++;
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}
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}
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let ones = 0;
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for (let i = 0; i < width; i++) {
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if (counter[i][1] >= counter[i][0]) ones++;
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ones = ones << 1;
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}
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ones = ones >> 1;
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const zeroes = ones ^ (Math.pow(2, width) - 1); // xor with a mask the same size as the width
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return ones * zeroes;
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}
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await measureDuration(() => console.log("Part 1", part1(input)));
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export function part2(input: string[]): number {
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return 0;
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}
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await measureDuration(() => console.log("Part 2", part2(input)));
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