2019 Day 24 Complete

2019/day24/input

@@ -0,0 +1,5 @@
+##.#.
+.#.##
+.#...
+#..#.
+.##..

2019/day24/layout.go

@@ -0,0 +1,112 @@
+package main
+
+import (
+	"log"
+	"math"
+	"strings"
+
+	"io/ioutil"
+
+	h "git.bullercodeworks.com/brian/adventofcode/helpers"
+)
+
+type Layout struct {
+	Area        map[h.Coordinate]bool
+	BottomRight h.Coordinate
+
+	History map[string]float64
+}
+
+func NewLayout(filename string) *Layout {
+	ret := Layout{
+		Area:        make(map[h.Coordinate]bool),
+		BottomRight: h.Coordinate{X: 0, Y: 0},
+		History:     make(map[string]float64),
+	}
+	input, err := ioutil.ReadFile(filename)
+	if err != nil {
+		log.Fatal(err.Error())
+	}
+	lines := make([]string, 0)
+	for _, line := range strings.Split(string(input), "\n") {
+		lines = append(lines, line)
+	}
+	for y := 0; y < len(lines); y++ {
+		if len(lines[y]) < ret.BottomRight.X {
+			break
+		}
+		ret.BottomRight.Y = y
+		for x := 0; x < len(lines[y]); x++ {
+			ret.BottomRight.X = x
+			ret.Area[h.Coordinate{X: x, Y: y}] = lines[y][x] == '#'
+		}
+	}
+	ret.SaveToHistory()
+	return &ret
+}
+
+func (l Layout) SaveToHistory() {
+	l.History[l.String()] = l.Rating()
+}
+
+func (l Layout) Rating() float64 {
+	var rating, pow float64
+	for y := 0; y <= l.BottomRight.Y; y++ {
+		for x := 0; x <= l.BottomRight.X; x++ {
+			if l.Area[h.Coordinate{X: x, Y: y}] {
+				rating = rating + math.Pow(2, pow)
+			}
+			pow++
+		}
+	}
+	return rating
+}
+
+func (l Layout) Step() bool {
+	a := make(map[h.Coordinate]bool)
+	for k, v := range l.Area {
+		a[k] = v
+	}
+	for y := 0; y <= l.BottomRight.Y; y++ {
+		for x := 0; x <= l.BottomRight.X; x++ {
+			c := h.Coordinate{X: x, Y: y}
+			neighbors := 0
+			for _, v := range []h.Coordinate{c.North(), c.East(), c.South(), c.West()} {
+				if n, ok := l.Area[v]; ok && n {
+					neighbors++
+				}
+			}
+			if l.Area[c] {
+				if neighbors != 1 {
+					a[c] = false
+				}
+			} else {
+				if neighbors == 1 || neighbors == 2 {
+					a[c] = true
+				}
+			}
+		}
+	}
+	for k, v := range a {
+		l.Area[k] = v
+	}
+	// Finally check/save to history
+	_, ok := l.History[l.String()]
+	l.History[l.String()] = l.Rating()
+	return ok
+}
+
+func (l Layout) String() string {
+	var ret string
+	for y := 0; y <= l.BottomRight.Y; y++ {
+		for x := 0; x <= l.BottomRight.X; x++ {
+			if l.Area[h.Coordinate{X: x, Y: y}] {
+				ret = ret + "#"
+			} else {
+				ret = ret + "."
+			}
+		}
+		ret = ret + "\n"
+	}
+	return ret
+}

2019/day24/layout3d.go

@@ -0,0 +1,215 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"strings"
+
+	h "git.bullercodeworks.com/brian/adventofcode/helpers"
+)
+
+type Layout3d struct {
+	Area        map[h.Coordinate3d]bool
+	TopLeft     h.Coordinate3d
+	BottomRight h.Coordinate3d
+}
+
+func NewLayout3d(filename string) *Layout3d {
+	ret := Layout3d{
+		Area:        make(map[h.Coordinate3d]bool),
+		TopLeft:     h.Coordinate3d{X: 0, Y: 0, Z: 0},
+		BottomRight: h.Coordinate3d{X: 0, Y: 0, Z: 0},
+	}
+	input, err := ioutil.ReadFile(filename)
+	if err != nil {
+		log.Fatal(err.Error())
+	}
+	lines := make([]string, 0)
+	for _, line := range strings.Split(string(input), "\n") {
+		lines = append(lines, line)
+	}
+	for y := 0; y < len(lines); y++ {
+		if len(lines[y]) < ret.BottomRight.X {
+			break
+		}
+		ret.BottomRight.Y = y
+		for x := 0; x < len(lines[y]); x++ {
+			ret.BottomRight.X = x
+			ret.Area[h.Coordinate3d{X: x, Y: y}] = lines[y][x] == '#'
+		}
+	}
+	return &ret
+}
+
+func (l *Layout3d) Step() {
+	a := make(map[h.Coordinate3d]bool)
+	for k, v := range l.Area {
+		a[k] = v
+	}
+	middle := h.Coordinate{X: l.BottomRight.X / 2, Y: l.BottomRight.Y / 2}
+	for z := l.TopLeft.Z - 1; z <= l.BottomRight.Z+1; z++ {
+		for y := l.TopLeft.Y; y <= l.BottomRight.Y; y++ {
+			for x := l.TopLeft.X; x <= l.BottomRight.X; x++ {
+				c := h.Coordinate3d{X: x, Y: y, Z: z}
+				if x == middle.X && y == middle.Y {
+					a[c] = false
+					continue
+				}
+				neighbors := l.GetNeighborCount(c)
+				if l.Area[c] {
+					if neighbors != 1 {
+						a[c] = false
+					}
+				} else {
+					if neighbors == 1 || neighbors == 2 {
+						a[c] = true
+						// If c is on a new 'z', we need to expand our TopLeft/BottomRight
+						if c.Z < l.TopLeft.Z {
+							l.TopLeft.Z = c.Z
+						} else if c.Z > l.BottomRight.Z {
+							l.BottomRight.Z = c.Z
+						}
+					}
+				}
+			}
+		}
+	}
+	for k, v := range a {
+		l.Area[k] = v
+	}
+}
+
+func (l *Layout3d) GetNeighborCount(c h.Coordinate3d) int {
+	middle := h.Coordinate3d{X: l.BottomRight.X / 2, Y: l.BottomRight.Y / 2, Z: c.Z}
+	var neighbors []h.Coordinate3d
+
+	if c.Y == l.TopLeft.Y {
+		neighbors = append(neighbors, middle.Up().North())
+		neighbors = append(neighbors, c.South())
+		if c.X == l.TopLeft.X {
+			neighbors = append(neighbors, middle.Up().West())
+			neighbors = append(neighbors, c.East())
+		} else if c.X == l.BottomRight.X {
+			neighbors = append(neighbors, middle.Up().East())
+			neighbors = append(neighbors, c.West())
+		} else {
+			neighbors = append(neighbors, c.West())
+			neighbors = append(neighbors, c.East())
+		}
+	} else if c.Y == l.BottomRight.Y {
+		neighbors = append(neighbors, middle.Up().South())
+		neighbors = append(neighbors, c.North())
+		if c.X == l.TopLeft.X {
+			neighbors = append(neighbors, middle.Up().West())
+			neighbors = append(neighbors, c.East())
+		} else if c.X == l.BottomRight.X {
+			neighbors = append(neighbors, middle.Up().East())
+			neighbors = append(neighbors, c.West())
+		} else {
+			neighbors = append(neighbors, c.West())
+			neighbors = append(neighbors, c.East())
+		}
+	} else if c.X == l.TopLeft.X {
+		neighbors = append(neighbors, middle.Up().West())
+		neighbors = append(neighbors, c.East())
+		if c.Y == l.TopLeft.Y {
+			neighbors = append(neighbors, middle.Up().North())
+			neighbors = append(neighbors, c.South())
+		} else if c.Y == l.BottomRight.Y {
+			neighbors = append(neighbors, middle.Up().South())
+			neighbors = append(neighbors, c.North())
+		} else {
+			neighbors = append(neighbors, c.South())
+			neighbors = append(neighbors, c.North())
+		}
+	} else if c.X == l.BottomRight.X {
+		neighbors = append(neighbors, middle.Up().East())
+		neighbors = append(neighbors, c.West())
+		if c.Y == l.TopLeft.Y {
+			neighbors = append(neighbors, middle.Up().North())
+			neighbors = append(neighbors, c.South())
+		} else if c.Y == l.BottomRight.Y {
+			neighbors = append(neighbors, middle.Up().South())
+			neighbors = append(neighbors, c.North())
+		} else {
+			neighbors = append(neighbors, c.South())
+			neighbors = append(neighbors, c.North())
+		}
+	} else if c.Y == middle.Y-1 && c.X == middle.X {
+		neighbors = append(neighbors, c.North())
+		neighbors = append(neighbors, c.East())
+		neighbors = append(neighbors, c.West())
+		// South is the North row of the lower grid
+		for x := l.TopLeft.X; x <= l.BottomRight.X; x++ {
+			neighbors = append(neighbors, h.Coordinate3d{X: x, Y: l.TopLeft.Y, Z: c.Down().Z})
+		}
+	} else if c.Y == middle.Y+1 && c.X == middle.X {
+		neighbors = append(neighbors, c.East())
+		neighbors = append(neighbors, c.South())
+		neighbors = append(neighbors, c.West())
+		// North is the South row of the lower grid
+		for x := l.TopLeft.X; x <= l.BottomRight.X; x++ {
+			neighbors = append(neighbors, h.Coordinate3d{X: x, Y: l.BottomRight.Y, Z: c.Down().Z})
+		}
+	} else if c.X == middle.X-1 && c.Y == middle.Y {
+		neighbors = append(neighbors, c.North())
+		neighbors = append(neighbors, c.South())
+		neighbors = append(neighbors, c.West())
+		// East is the West row of the lower grid
+		for y := l.TopLeft.Y; y <= l.BottomRight.Y; y++ {
+			neighbors = append(neighbors, h.Coordinate3d{X: l.TopLeft.X, Y: y, Z: c.Down().Z})
+		}
+	} else if c.X == middle.X+1 && c.Y == middle.Y {
+		neighbors = append(neighbors, c.North())
+		neighbors = append(neighbors, c.East())
+		neighbors = append(neighbors, c.South())
+		// West is the East row of the lower grid
+		for y := l.TopLeft.Y; y <= l.BottomRight.Y; y++ {
+			neighbors = append(neighbors, h.Coordinate3d{X: l.BottomRight.X, Y: y, Z: c.Down().Z})
+		}
+	} else {
+		neighbors = append(neighbors, c.North())
+		neighbors = append(neighbors, c.East())
+		neighbors = append(neighbors, c.South())
+		neighbors = append(neighbors, c.West())
+	}
+	ret := 0
+	for _, v := range neighbors {
+		if n, ok := l.Area[v]; ok && n {
+			ret++
+		}
+	}
+	return ret
+}
+
+func (l *Layout3d) CountBugs() int {
+	var ret int
+	for _, v := range l.Area {
+		if v {
+			ret++
+		}
+	}
+	return ret
+}
+
+func (l Layout3d) String() string {
+	var ret string
+	middle := h.Coordinate{X: l.BottomRight.X / 2, Y: l.BottomRight.Y / 2}
+	for z := l.TopLeft.Z; z <= l.BottomRight.Z; z++ {
+		ret = fmt.Sprintf("%s\nDepth %d:\n", ret, z)
+		for y := l.TopLeft.Y; y <= l.BottomRight.Y; y++ {
+			for x := l.TopLeft.X; x <= l.BottomRight.X; x++ {
+				if x == middle.X && y == middle.Y {
+					ret = ret + "?"
+				} else if l.Area[h.Coordinate3d{X: x, Y: y, Z: z}] {
+					ret = ret + "#"
+				} else {
+					ret = ret + "."
+				}
+			}
+			ret = ret + "\n"
+		}
+	}
+	return ret
+}

2019/day24/main.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"fmt"
+
+	h "git.bullercodeworks.com/brian/adventofcode/helpers"
+)
+
+func main() {
+	filename := "input"
+	if h.GetArgNumber(1) != "" {
+		filename = h.GetArgNumber(1)
+	}
+	if h.GetArgNumber(2) != "2" {
+		part1(filename)
+	} else {
+		part2(filename)
+	}
+}
+
+func part1(filename string) {
+	l := NewLayout(filename)
+	for !l.Step() {
+		fmt.Println(h.CLEAR_SCREEN)
+		fmt.Println(l)
+		fmt.Println(int(l.Rating()))
+	}
+	fmt.Println(h.CLEAR_SCREEN)
+	fmt.Println(l)
+	fmt.Println(int(l.Rating()))
+}
+
+func part2(filename string) {
+	l := NewLayout3d(filename)
+	for i := 0; i < 200; i++ {
+		l.Step()
+	}
+	fmt.Println("Bugs:", l.CountBugs())
+}

2019/day24/testinput

@@ -0,0 +1,5 @@
+....#
+#..#.
+#..##
+..#..
+#....

helpers/coordinate.go

@@ -14,6 +14,19 @@ func NewCoordinate(x, y int) *Coordinate {
 	return &Coordinate{x, y}
 }
 
+func (c *Coordinate) North() Coordinate {
+	return Coordinate{X: c.X, Y: c.Y - 1}
+}
+func (c *Coordinate) East() Coordinate {
+	return Coordinate{X: c.X + 1, Y: c.Y}
+}
+func (c *Coordinate) South() Coordinate {
+	return Coordinate{X: c.X, Y: c.Y + 1}
+}
+func (c *Coordinate) West() Coordinate {
+	return Coordinate{X: c.X - 1, Y: c.Y}
+}
+
 func (c *Coordinate) GetNorthCoord() *Coordinate {
 	return &Coordinate{
 		X: c.X,

helpers/coordinate3d.go

@@ -10,6 +10,25 @@ func NewCoordinate3d(x, y, z int) *Coordinate3d {
 	return &Coordinate3d{x, y, z}
 }
 
+func (c Coordinate3d) North() Coordinate3d {
+	return Coordinate3d{X: c.X, Y: c.Y - 1, Z: c.Z}
+}
+func (c Coordinate3d) East() Coordinate3d {
+	return Coordinate3d{X: c.X + 1, Y: c.Y, Z: c.Z}
+}
+func (c Coordinate3d) South() Coordinate3d {
+	return Coordinate3d{X: c.X, Y: c.Y + 1, Z: c.Z}
+}
+func (c Coordinate3d) West() Coordinate3d {
+	return Coordinate3d{X: c.X - 1, Y: c.Y, Z: c.Z}
+}
+func (c Coordinate3d) Up() Coordinate3d {
+	return Coordinate3d{X: c.X, Y: c.Y, Z: c.Z + 1}
+}
+func (c Coordinate3d) Down() Coordinate3d {
+	return Coordinate3d{X: c.X, Y: c.Y, Z: c.Z - 1}
+}
+
 func (c *Coordinate3d) GetNorthCoord() *Coordinate3d {
 	return &Coordinate3d{
 		X: c.X,