Day17
Karl Spickermann
3 years ago
parent
698ddc4dfd
commit
6194da02c9
@ -0,0 +1,167 @@
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package main
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import (
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"AoC2020/helper"
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"fmt"
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"os"
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)
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func main() {
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args := os.Args[1:]
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input, err := helper.GetInput(args[0])
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if err != nil {
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fmt.Println(err)
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}
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dimension := readInputLayer(input,0)
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fmt.Println(len(getDirectionsPart2()))
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for i := 0; i < 6; i++ {
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dimension = run(dimension, getDirectionsPart2)
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}
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}
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func run(dimension map[[4]int]rune, getDirections func() [][4]int) map[[4]int]rune {
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var changedValues = make(map[[4]int]rune)
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directions := getDirections()
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visitedNeighbours := make(map[[4]int]int)
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for position, status := range dimension {
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neighbourPosition := getNeighbourPoints(position,directions)
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neighbours := getActiveNeighbours(dimension, neighbourPosition)
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if status == '#' && !(neighbours == 2 || neighbours == 3) {
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changedValues[position] = '.'
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}
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for _, position := range neighbourPosition {
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visitedNeighbours[position] ++
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}
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}
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for position, val := range visitedNeighbours {
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if val == 3 {
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changedValues[position] = '#'
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}
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}
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for position, status := range changedValues {
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//fmt.Printf("Changed Position: %v Status: %v \n",position,string(status))
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if status == '.' {
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delete(dimension, position)
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}
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if status == '#' {
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dimension[position] = status
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}
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}
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fmt.Printf("Active Points: %v \n", len(dimension))
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return dimension
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}
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func readInputLayer(input []string, layerLevel int) map[[4]int]rune {
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var layer = make(map[[4]int]rune)
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for y, row := range input {
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for x, val := range row {
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if val == '#' {
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layer[[4]int{y,x,layerLevel,0}] = val
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}
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}
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}
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return layer
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}
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func printLayer(layer int, width int, height int, dimension map[[3]int]rune) {
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for i:= 0; i < height; i++ {
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var row []rune
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for j:= 0; j < width; j++ {
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val := dimension[[3]int{i,j,layer}]
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if val == '#' {
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row = append(row,val)
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}else {
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row = append(row, '.')
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}
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}
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fmt.Println(string(row))
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}
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fmt.Println()
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}
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func getNeighbourPoints(position [4]int, directions [][4]int) [][4]int{
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var neighbourPositions [][4]int
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for _, direction := range directions {
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neighbourPositions = append(neighbourPositions, add(position, direction))
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}
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return neighbourPositions
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}
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func getActiveNeighbours(dimension map[[4]int]rune, neighbourPositions [][4]int) int {
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activeNeighbours := 0
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for _, neighbourPosition := range neighbourPositions {
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if dimension[neighbourPosition] == '#' {
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activeNeighbours++
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}
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}
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//fmt.Printf("Active Neighbours: %v \n" ,activeNeighbours)
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return activeNeighbours
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}
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func add(a [4]int, b [4]int) [4]int {
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return [4]int{a[0] + b[0], a[1] + b[1], a[2] + b[2], a[3] + b[3]}
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}
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func getDirections() [][4]int {
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possibleValues := [3]int{-1, 0, 1}
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var directions [][4]int
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for i := 0; i < 3; i++ {
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for j := 0; j < 3; j++ {
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for k := 0; k < 3; k++ {
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if possibleValues[i] != 0 || possibleValues[j] != 0 || possibleValues[k] != 0 {
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directions = append(directions, [4]int{possibleValues[i], possibleValues[j], possibleValues[k],0})
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}
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}
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}
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}
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return directions
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}
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func getDirectionsPart2() [][4]int {
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possibleValues := [3]int{-1, 0, 1}
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var directions [][4]int
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for i := 0; i < 3; i++ {
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for j := 0; j < 3; j++ {
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for k := 0; k < 3; k++ {
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for l := 0; l < 3; l++ {
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if possibleValues[i] != 0 || possibleValues[j] != 0 || possibleValues[k] != 0 || possibleValues[l] != 0 {
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directions = append(directions, [4]int{possibleValues[i], possibleValues[j], possibleValues[k],possibleValues[l]})
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}
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}
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}
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}
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}
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return directions
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}
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func getStatus(position [3]int, dimension [][][]rune) rune {
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if len(dimension) < position[0] {
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return '.'
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}
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layer := dimension[position[0]]
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if len(layer) < position[1] {
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return '.'
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}
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row := layer[position[1]]
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if len(row) < position[2] {
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return '.'
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}
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return rune(row[position[2]])
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}
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func initiateDimension(z int, x int, y int) [][][]rune {
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var emptyRow []rune
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for i := 0; i < x; i++ {
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emptyRow = append(emptyRow, '.')
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}
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var emptyLayer [][]rune
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for i := 0; i < y; i++ {
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emptyLayer = append(emptyLayer, emptyRow)
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}
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var emptyDimension [][][]rune
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for i := 0; i < z; i++ {
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emptyDimension = append(emptyDimension, emptyLayer)
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}
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return emptyDimension
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}
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@ -0,0 +1,8 @@
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##....#.
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#.#..#..
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...#....
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...#.#..
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###....#
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#.#....#
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.#....##
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.#.###.#
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@ -0,0 +1,3 @@
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.#.
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..#
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###
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