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Day 11 puzzle 1 and 2
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‎2020/day11.js‎

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import { readFile } from "../aoc.js";
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async function processLineByLine() {
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let input = await readFile('2020/day11.txt')
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input = input.map(line => line.split(''))
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puzzle1(JSON.parse(JSON.stringify(input)))
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puzzle2(JSON.parse(JSON.stringify(input)))
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}
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function getOccupiedAdjacentSeats (input, row, column) {
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let occupied = 0
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// Get row above
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if (row - 1 >= 0) {
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const topRow = input[row - 1]
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topRow[column-1] === '#' && occupied++
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topRow[column] === '#' && occupied++
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topRow[column+1] === '#' && occupied++
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}
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// Left and right
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const sameRow = input[row]
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sameRow[column-1] === '#' && occupied++
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sameRow[column+1] === '#' && occupied++
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// Bottom row
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if (row + 1 <= input.length - 1) {
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const bottomRow = input[row + 1]
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bottomRow[column-1] === '#' && occupied++
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bottomRow[column] === '#' && occupied++
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bottomRow[column+1] === '#' && occupied++
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}
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return occupied
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}
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function getOccupiedVisibleSeats (input, row, column) {
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const freeSeatInDirection = (directionY, directionX) => {
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let searchRow = row
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let searchColumn = column
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let searching = true
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let isOccupied = false
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while (searching === true) {
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searchRow += directionY
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searchColumn += directionX
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// Check if we are going out of bounds
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if (searchRow < 0 || searchRow > input.length - 1) {
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isOccupied = false
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break
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} else if (searchColumn < 0 || searchColumn > input[row].length - 1) {
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isOccupied = false
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break
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}
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// See if we have a occupied or free seat (ignore floor (.))
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const seat = input[searchRow][searchColumn]
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if (seat === 'L') {
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isOccupied = false
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searching = false
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break
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} else if (seat === '#') {
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isOccupied = true
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searching = false
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break
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}
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}
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return isOccupied
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}
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let occupied = 0
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freeSeatInDirection(-1, -1) && occupied++ // top left
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freeSeatInDirection(-1, 0) && occupied++ // top
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freeSeatInDirection(-1, 1) && occupied++ // top right
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freeSeatInDirection(0, -1) && occupied++ // left
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freeSeatInDirection(0, 1) && occupied++ // right
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freeSeatInDirection(1, -1) && occupied++ // bottom left
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freeSeatInDirection(1, 0) && occupied++ // bottom
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freeSeatInDirection(1, 1) && occupied++ // bottom right
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return occupied
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}
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function solve(input, occupiedSeatFunc, thresholdLeaveSeat) {
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let seatsChanged = true
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while (seatsChanged === true) {
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const copy = JSON.parse(JSON.stringify(input))
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let seatsChangedCurrentRound = false
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for (let row = 0; row < copy.length; row++) {
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for (let column = 0; column < copy[0].length; column++) {
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const currentSeat = copy[row][column]
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if (currentSeat === '.') {
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continue
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}
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const occupiedSeats = occupiedSeatFunc(copy, row, column)
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if (currentSeat === 'L' && occupiedSeats === 0) {
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// If a seat is empty (L) and there are no occupied seats adjacent to it, the seat becomes occupied.
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input[row][column] = '#'
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seatsChangedCurrentRound = true
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} else if (currentSeat === '#' && occupiedSeats >= thresholdLeaveSeat) {
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// If a seat is occupied (#) and more then {thresholdLeaveSeat} seats adjacent to it are also occupied, the seat becomes empty.
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input[row][column] = 'L'
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seatsChangedCurrentRound = true
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}
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}
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}
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seatsChanged = seatsChangedCurrentRound
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}
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// Count rows that are occupied
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const totalSeatsOccupied = input.reduce((prev, current) => {
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const seatsInThisRowOccupied = current.join('').match(new RegExp("#", "g")) || []
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prev += seatsInThisRowOccupied.length
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return prev
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}, 0)
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return totalSeatsOccupied
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}
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function puzzle1(input) {
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const totalSeatsOccupied = solve(input, getOccupiedAdjacentSeats, 4)
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console.log(`Puzzle 1: ${totalSeatsOccupied}`)
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}
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function puzzle2(input) {
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const totalSeatsOccupied = solve(input, getOccupiedVisibleSeats, 5)
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console.log(`Puzzle 2: ${totalSeatsOccupied}`)
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}
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processLineByLine();

‎2020/day11.txt‎

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LLLLLL.LLLLLLLLLLLL.LLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LL
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LLLLL..LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLL.LL.LLLLLLLLLLLLLL.LL.LLLLLLLLL
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LLLLLL.LLLLL..LLLLL.LLLLLLL.LLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLL.L.LLLLL.L
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LLLLLL.LLLLLL.LLL.L.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.LLLLLL..LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLL.LLL
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.LLLLLLLLLLLL.LLL.L.LLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLL.LLLLLL.L.L.LLLLLLLLLLLLL.L.LLLLLLLLL
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LLLLLL.LLLLLL.LLLLL.LLLLLLL..LLLLLLLLLL..LLLLLLL.LLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLL.LLLL..LLLLLLLL
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LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLL.L.LLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLL.LL..LLLLLLL.LLLLLLLLLL
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LLLLLLLLLLLLL.LLLLL.LLLLLLL.LLL.L.LLLLLLLLLLLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLL.LLL
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.LLLLL..LL.LL..LLL.LLLLLLLL.LLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLL
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L.LLLL.LLL.LLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLL.LLL.LLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLL
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LLLLLL.LLLLLLLLLLLLLLLLLLLL.L.LLLLLLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLL.L.LLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLL.L.LLLLLLLL.LLLLLLLL.LLLLLLLLL
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...LLLLL.......L.LL..L..LL...LL..L.....L...L...LLL.L.L.....L.L....L.L......LL..L.L.L..LL.L.....LL.
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LLLLLLLLLLL.L.LLL.LLLLLLLLL.LLLLLLLLLLL.LLLLLLLL.LLLL.LLLLLLLLLLLLLLLL.LLLLLL.L.LL.LLLLLLLLLLLLLLL
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LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLLLLLLL.LLL.LLL.LLLLLLLL.LLLLLLLL..LLLLLLLLLLLLLL.LL
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LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLL.LLLLL.L.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLL..LL.L.LLLLLLL.LLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLL.L.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLL.LLLL.LLLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.L.LLLLLLLLL
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L.LLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.LLLL.LL.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL
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.LLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.L.LLL.LLLLLLLL.LLL..LLLLLLL.LL.LLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLL.LLLLLLLLLLLLLLLL.L.LLLLLL.LLLLLLLLLLLLLLLLL.
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L.LL..LLL.L.........L.L....L...LL.L......L..LL.......L.....L.LL.....L..L.L.....L.....L.L...L.L....
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LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL..LLLL..LLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLL
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LLL.L..LLLL.L.LLLLLLLLLLLLL.LLLLL.LLLLL.L.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL..LLLLLLLL
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LLLLLL.LLLLLL.LLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLL.LLLLLLL..LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLL
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LL.LLLLLLLLLLLLLLL..LLLLLLLLLLLL..LLLLLLLLL.LLLLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL.L.LLLLLLLLL
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LLLLLL..LLLLLLLLLLLLLLLLL.L.LLLLLLLLLLL.LLLLLLLL.LLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL
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..L...L...L..L..LL...L..........L.....L......L....L.L..L.L.L..L.LL....L..L...L...L......L.....L..L
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LLLLLLLLLLLL..LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLL.LL.LLLLLLLLLLLLL.L.LLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.L.LLLLL.LLLLLLLLLLLLLLLLL..LLLLLLL.LLLLLLLLL
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LLLLLLLLLLLLL.LLLLLLLL.LLLL.LLLLL.LLLLLLLLLLLLLL.LLLL.LLLLLLLLL.LLLLLL.LLLLLL.LLLLLLLLLL.LLLLLLLLL
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LLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL.LLL.LLLL.LLLLLLLL.LLLLL.LLLLLLLLLL.L
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LLLLLLLLLLLLL.L.LLL.LLLLLLL.LLLLL.LLLLL.LLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLL.LLL.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLL..LLLLLLLLL
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LLL..L..LLLL.LLL.L......L...LL.L..L.L...L...LL....L.L.L.L................L....L..L...L......LLL.L.
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LLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLL..LLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLL..LLLLLLL.LLLLLLLLLLLLLLLLLL
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LLLLLL.LLLLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLL.LL.LLLLLLLL.LLLLLL.LLLLLLLLLL.LLLLLLLLL
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.LLLLL.LLLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLL.LLLL
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LLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLL..LLLLLLLL.LLLLLLLL.LLLLLLLL.L.LLLLLLL
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LLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLL.LLLLLLLLLLLLLLLL.LLLLL.LL.LLLLLLLLLLLLLLLLLL
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LLLLLL.LLLLLL.LLLLL.LLLL.LL.LLLLL.LLLLL.LLLLLLLL..LLL.LLLLL.L.LLLLLLLLLLLLLLLLL.LLL.LLLL.LLLLLLLLL
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LL.LLL.LLLLLL.LLLLL.LLLLLLLLLLLLL.LL.LLLLLLLLLLL.LLLLLLLLLLLL.LLLLLLLL.LLL.L.LL.LLLLLLLLLLL.LLLLLL
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LLLLLLLLLLLLL.LLLLL..LLLLLLLLLLLLLLLLLL.L.LLLLLL.LLLL.LLLLLLL.LLLLLLLLL.LLLLLLLLLLLLLLLL.LLLLLLLLL
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.LLLLL..L.L.L...L...L..LL.L.L.LL.L...L.L.L...................LL..L...L......L..L.........L.....LL.
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LLLL.LLLLLLLL.LLLLL.LLLLLLL.LLLLLL.LLLLLLLLLLLLL.LLLL.L.LLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLL.LLLLLL.L.LLLL.LLLLL.LLLLLLLLLLLLLL.LLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.LLLL.LLL.LL..LLLL.
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.LLLLL.LLLLLLLLLLLL.LLLL.LLLLLLLL.LLLLLLLLLLLLLL.L.LLLL.LLLLLLLLLLLLLL.LLLLLLL..LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLL...LLLLL.LLLLLLL.LLLL.LLLLLL..LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
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LLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLL.LLL.LLLLLLLLL.LLLLLLL.LLLLLLLL..L.LLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LL.LLLLLLLLLLLLLL.
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LLL.LL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL
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LLLLLL.LLLLLL.LLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL
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LLLLLL.LLL..L.LLLLL.LLLLLLLLLLLLLLLLL.L.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL
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L.LL.L.L...L.LL.L.LLL...L.......LLL.L.LL..LLLL.L.L...L..LL.L..LL..L.L..LLLL.L.L..L.L....L....L...L
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LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLL.LLLL.L.LLLLLLL
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LLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL.LL.LLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLL
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LLLLLL.L.LLLL.LLLLL.LLL.LLL.LLLLLLLLLLLLL.LLLLLLLLLLL.LLLLLL..LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLL.LLLLLLLL.LLLLL..LLLLLLLLLLLL.LL.LL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.L.LLLLLL.LLLLLLLLLLLLLLLLLL
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LLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL..LLLLLLL.LL.LLLLLL
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LLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLL.LLLL..LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLL.LLLLL
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L.L..L................L..LL.....LL...L............L....LL..LL.LLL.L.............L..L...L.....LLL..
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LLLLLLLLLLLLLLLL.LL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLL.LLLLLL.LLLLLLL.LLLLL.LLL.LLLLLLLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.
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LLLLLL.LLLLLLLLLLLLLL.LLLLL.LLLLL.LL.LL.LLLLLLLL.LLLL.LLLLLLL.LL.LLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLL
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LLLL.LL.LLLLL.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLL..LLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLL.LLLLLLL.LLL.LLLL.LLLLLL.L.LLLLLLLL.LLLLLLLLL
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L.L..L...LL.L.....LL..LL.L.....L.L..L....L..L.L...L.LLLL....L...LL......L..L....LL..L..L........LL
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LLLLLLLLLLLLLLLLLLL.LLLL.LL.LLLLLLLLLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLL.LLL.LLLL.LLLLLLLL.LLLLL.LLL
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LLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLLLLL.LL.LLLLLL.LLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL
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LLLLLL.LLLLL.LLLLLL.LLLLLLL.LLLLLLLLLLL..LLLLLLL.L.LL.LLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLL..LLLLLLLLL
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LLLLLL.LLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLL.LLLL.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLLLLLLLLLLLLL.LL.LLLLL.LLLLLLLLLLLLLLLL.LLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLL.L.LLLLLLLLLLLLL.LLLLLLLLL.L.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLL..LLLLLLLL.LLLLLLLLL
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LLLLL..LLLL.L.LLLLL.LLLLLLLLLLLLL.LLLLL.LLLLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLLLLL..LLLLLLLL.LLLLLLLLL
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L.LLLLLLLLLLLLLLLLL.LLLLLLL.LL.LL.LLLLL.LLLLLLLLLLLLL.LL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL
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LL.L......L......L...L..LLL.....L.L..L.L...L......L..L..L.....L...LL.L.LL.L.LLL....L.LLL....L..L..
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LLLLLLLLLL.LLLLLLLLLL.LL.LL.LLLLLLLLLLL.L..LLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLL.LL..LLL.LLLLLLL.LLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLL..LL.LL.LLLLL.LLLLLLL.L.LLLLLLLLL.LLLLLLLL.LLLLLLLL.LLL.LLL.LLLL.LLLLLLLLLLLLLLLL..LLLLLLLLL
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LLLLLLLLLLL.L.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.L.LLLLLLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLL..LLLL.LLLLLLLLLLLLLLLL.LL.LLLL.LLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLL.L.L.LLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLL
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L..L.LL......LLL....LLLL.......L.L..L..L....LLLLL..LLLLL..L..L.L.L........LLL...LL.L......LLL.....
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LLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLL..LLLLLLLLLLLLLLLLLLL.LLLLLLLLL.LL.LLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLL.LLLL.LLLLLLLL..LLLLLL.LLLLL.LLLL...LLLLL.L.LLLL.LLLLLLL..LLLLLLLL.LLLLLLLLLLLLLLLL.LLLLLLLLL
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LLLLLLLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLLLLLLL.LLLLLL.LLLLLLLL.LLLLL.LLL
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LLLLLLLLLLLLL.LLLLL.L.LLLLL.LLLLLLLLLLL.LLLLLLLLLL.LL.LLLLLLLLLL.LLLLL.LLLLLLLL.LLLLLLLLLLLLL.LLLL
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LLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLL
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LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLL.L.LLLLLL.LLLLLLLLLLLLLLLLL.
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LLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLL.LLLLLLLL.LLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLL

‎2020/day11test.txt‎

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L.LL.LL.LL
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L.L.L..L..
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L.LL.LL.LL
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L.LLLLL.LL
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..L.L.....
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LLLLLLLLLL
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L.LLLLLL.L
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L.LLLLL.LL

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