diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index a46584a..cf3300e 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -11,9 +11,8 @@
-
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@@ -55,7 +54,7 @@
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@@ -125,6 +124,16 @@
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@@ -245,9 +254,11 @@
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@@ -269,11 +280,11 @@
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@@ -282,26 +293,26 @@
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@@ -318,10 +329,10 @@
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diff --git a/day17/day17.go b/day17/day17.go
new file mode 100644
index 0000000..65bee32
--- /dev/null
+++ b/day17/day17.go
@@ -0,0 +1,167 @@
+package main
+
+import (
+ "AoC2020/helper"
+ "fmt"
+ "os"
+)
+
+func main() {
+ args := os.Args[1:]
+ input, err := helper.GetInput(args[0])
+ if err != nil {
+ fmt.Println(err)
+ }
+ dimension := readInputLayer(input,0)
+ fmt.Println(len(getDirectionsPart2()))
+ for i := 0; i < 6; i++ {
+ dimension = run(dimension, getDirectionsPart2)
+ }
+}
+
+func run(dimension map[[4]int]rune, getDirections func() [][4]int) map[[4]int]rune {
+ var changedValues = make(map[[4]int]rune)
+ directions := getDirections()
+ visitedNeighbours := make(map[[4]int]int)
+ for position, status := range dimension {
+ neighbourPosition := getNeighbourPoints(position,directions)
+ neighbours := getActiveNeighbours(dimension, neighbourPosition)
+ if status == '#' && !(neighbours == 2 || neighbours == 3) {
+ changedValues[position] = '.'
+ }
+ for _, position := range neighbourPosition {
+ visitedNeighbours[position] ++
+ }
+ }
+ for position, val := range visitedNeighbours {
+ if val == 3 {
+ changedValues[position] = '#'
+ }
+ }
+ for position, status := range changedValues {
+ //fmt.Printf("Changed Position: %v Status: %v \n",position,string(status))
+ if status == '.' {
+ delete(dimension, position)
+ }
+ if status == '#' {
+ dimension[position] = status
+ }
+ }
+ fmt.Printf("Active Points: %v \n", len(dimension))
+ return dimension
+}
+
+func readInputLayer(input []string, layerLevel int) map[[4]int]rune {
+ var layer = make(map[[4]int]rune)
+ for y, row := range input {
+ for x, val := range row {
+ if val == '#' {
+ layer[[4]int{y,x,layerLevel,0}] = val
+ }
+ }
+ }
+ return layer
+}
+
+func printLayer(layer int, width int, height int, dimension map[[3]int]rune) {
+ for i:= 0; i < height; i++ {
+ var row []rune
+ for j:= 0; j < width; j++ {
+ val := dimension[[3]int{i,j,layer}]
+ if val == '#' {
+ row = append(row,val)
+ }else {
+ row = append(row, '.')
+ }
+ }
+ fmt.Println(string(row))
+ }
+ fmt.Println()
+}
+
+func getNeighbourPoints(position [4]int, directions [][4]int) [][4]int{
+ var neighbourPositions [][4]int
+ for _, direction := range directions {
+ neighbourPositions = append(neighbourPositions, add(position, direction))
+ }
+ return neighbourPositions
+}
+
+func getActiveNeighbours(dimension map[[4]int]rune, neighbourPositions [][4]int) int {
+ activeNeighbours := 0
+ for _, neighbourPosition := range neighbourPositions {
+ if dimension[neighbourPosition] == '#' {
+ activeNeighbours++
+ }
+ }
+ //fmt.Printf("Active Neighbours: %v \n" ,activeNeighbours)
+ return activeNeighbours
+}
+
+func add(a [4]int, b [4]int) [4]int {
+ return [4]int{a[0] + b[0], a[1] + b[1], a[2] + b[2], a[3] + b[3]}
+}
+
+func getDirections() [][4]int {
+ possibleValues := [3]int{-1, 0, 1}
+ var directions [][4]int
+ for i := 0; i < 3; i++ {
+ for j := 0; j < 3; j++ {
+ for k := 0; k < 3; k++ {
+ if possibleValues[i] != 0 || possibleValues[j] != 0 || possibleValues[k] != 0 {
+ directions = append(directions, [4]int{possibleValues[i], possibleValues[j], possibleValues[k],0})
+ }
+ }
+ }
+ }
+ return directions
+}
+
+func getDirectionsPart2() [][4]int {
+ possibleValues := [3]int{-1, 0, 1}
+ var directions [][4]int
+ for i := 0; i < 3; i++ {
+ for j := 0; j < 3; j++ {
+ for k := 0; k < 3; k++ {
+ for l := 0; l < 3; l++ {
+ if possibleValues[i] != 0 || possibleValues[j] != 0 || possibleValues[k] != 0 || possibleValues[l] != 0 {
+ directions = append(directions, [4]int{possibleValues[i], possibleValues[j], possibleValues[k],possibleValues[l]})
+ }
+ }
+ }
+ }
+ }
+ return directions
+}
+
+func getStatus(position [3]int, dimension [][][]rune) rune {
+ if len(dimension) < position[0] {
+ return '.'
+ }
+ layer := dimension[position[0]]
+ if len(layer) < position[1] {
+ return '.'
+ }
+ row := layer[position[1]]
+ if len(row) < position[2] {
+ return '.'
+ }
+ return rune(row[position[2]])
+}
+
+
+func initiateDimension(z int, x int, y int) [][][]rune {
+ var emptyRow []rune
+ for i := 0; i < x; i++ {
+ emptyRow = append(emptyRow, '.')
+ }
+ var emptyLayer [][]rune
+ for i := 0; i < y; i++ {
+ emptyLayer = append(emptyLayer, emptyRow)
+ }
+ var emptyDimension [][][]rune
+ for i := 0; i < z; i++ {
+ emptyDimension = append(emptyDimension, emptyLayer)
+ }
+ return emptyDimension
+}
diff --git a/day17/day17Input.txt b/day17/day17Input.txt
new file mode 100644
index 0000000..eecab9f
--- /dev/null
+++ b/day17/day17Input.txt
@@ -0,0 +1,8 @@
+##....#.
+#.#..#..
+...#....
+...#.#..
+###....#
+#.#....#
+.#....##
+.#.###.#
diff --git a/day17/day17Test.txt b/day17/day17Test.txt
new file mode 100644
index 0000000..17630fd
--- /dev/null
+++ b/day17/day17Test.txt
@@ -0,0 +1,3 @@
+.#.
+..#
+###
\ No newline at end of file