generated from eric/adventofcode2023
104 lines
2.8 KiB
JavaScript
104 lines
2.8 KiB
JavaScript
import { readFileSync } from 'node:fs';
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let sampleMode = false;
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let usedArray = [];
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const sampleArray = readFileSync('sample.txt').toString().split("\n");
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const inputArray = readFileSync('input.txt').toString().split("\n");
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if (sampleMode) {
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usedArray = sampleArray;
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} else {
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usedArray = inputArray;
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}
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// Part One
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console.time("part1");
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let newInput = JSON.parse(JSON.stringify(usedArray));
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for (let i = 0; i < newInput.length; i++) {
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newInput[i] = newInput[i].split("");
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}
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for (let i = 1; i < newInput.length; i++) {
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for (let j = 0; j < newInput[i].length; j++) {
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if ((newInput[i - 1][j] === '|' || newInput[i - 1][j] === 'S') && newInput[i][j] === '.') {
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newInput[i][j] = '|';
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}
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if (newInput[i - 1][j] === '|' && newInput[i][j] === '^') {
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if (j > 0 && newInput[i][j - 1] === '.') {
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newInput[i][j - 1] = '|';
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}
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}
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if (newInput[i - 1][j] === '|' && newInput[i][j] === '^') {
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if (j < newInput[i].length - 1 && newInput[i][j + 1] === '.') {
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newInput[i][j + 1] = '|';
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}
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}
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}
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}
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let splits = 0;
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for (let i = 1; i < newInput.length; i++) {
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for (let j = 0; j < newInput[i].length; j++) {
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if (newInput[i][j] === '^' && newInput[i - 1][j] === '|') {
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splits++;
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}
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}
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}
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console.timeEnd("part1");
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console.log(splits);
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// Part Two
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console.time("part2");
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newInput = JSON.parse(JSON.stringify(usedArray));
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for (let i = 0; i < newInput.length; i++) {
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newInput[i] = newInput[i].split("");
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}
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for (let i = 1; i < newInput.length; i++) {
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for (let j = 0; j < newInput[i].length; j++) {
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if (newInput[i - 1][j] === 'S') {
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newInput[i][j] = 1;
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}
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if (Number.parseInt(newInput[i - 1][j]) > 0 && Number.parseInt(newInput[i][j]) > 0) {
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newInput[i][j] = newInput[i][j] + newInput[i - 1][j];
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}
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if ((Number.parseInt(newInput[i - 1][j]) > 0) && newInput[i][j] === '.') {
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newInput[i][j] = newInput[i - 1][j];
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}
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if (Number.parseInt(newInput[i - 1][j]) > 0 && newInput[i][j] === '^') {
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if (j > 0 && newInput[i][j - 1] === '.') {
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newInput[i][j - 1] = newInput[i - 1][j];
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} else if (j > 0 && Number.parseInt(newInput[i][j - 1]) > 0) {
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newInput[i][j - 1] = Number.parseInt(newInput[i][j - 1]) + newInput[i - 1][j];
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}
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if (j < newInput[i].length - 1 && newInput[i][j + 1] === '.') {
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newInput[i][j + 1] = newInput[i - 1][j];
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} else if (j < newInput[i].length - 1 && Number.parseInt(newInput[i][j + 1]) > 0) {
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newInput[i][j + 1] = Number.parseInt(newInput[i][j + 1]) + newInput[i - 1][j];
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}
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}
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}
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}
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let timelines = 0;
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const bottomRow = newInput[newInput.length - 1];
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for (let i = 0; i < bottomRow.length; i++) {
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if (Number.parseInt(bottomRow[i]) > 0) {
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timelines += Number.parseInt(bottomRow[i]);
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}
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}
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console.timeEnd("part2");
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console.log(timelines);
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// functions
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