64 lines
1.4 KiB
JavaScript
64 lines
1.4 KiB
JavaScript
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const fs = require('fs');
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const inputArray = fs.readFileSync('input.txt').toString().split("\n");
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const seabed = new Array(1000).fill(0).map(() => new Array(1000).fill(0));
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const vents = [];
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for (const vent of inputArray) {
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const ventArray = [];
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const endpoints = vent.split(" -> ");
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ventArray.push(endpoints[0].split(",").map(Number));
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ventArray.push(endpoints[1].split(",").map(Number));
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vents.push(ventArray);
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}
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// Part One
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// const part = 1;
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// Part Two
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const part = 2;
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for (const vent of vents) {
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let x1 = vent[0][0];
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let x2 = vent[1][0];
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let y1 = vent[0][1];
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let y2 = vent[1][1];
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if (x1 === x2) {
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if (y1 > y2) {
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[y1, y2] = [y2, y1];
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}
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for (let y = y1; y <= y2; y++) {
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seabed[x1][y]++;
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}
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} else if (y1 === y2) {
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if (x1 > x2) {
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[x1, x2] = [x2, x1];
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}
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for (let x = x1; x <= x2; x++) {
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seabed[x][y1]++;
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}
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} else if (part === 2) {
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const distance = Math.abs(x2 - x1);
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for (let i = 0; i <= distance; i++) {
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if (y1 > y2 && x1 > x2) {
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seabed[x1 - i][y1 - i]++;
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} else if (y1 > y2) {
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seabed[x1 + i][y1 - i]++;
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} else if (x1 > x2) {
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seabed[x1 - i][y1 + i]++;
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} else {
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seabed[x1 + i][y1 + i]++;
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}
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}
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}
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}
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let multiples = 0;
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for (const coordinate of seabed.flat(1)) {
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if (coordinate > 1) {
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multiples++;
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}
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}
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console.log(multiples);
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