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Day 17: Part 2

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But Part 1 is gone now!

Signed-off-by: James Griffin <james@unsupervised.ca>
This commit is contained in:
James Griffin
2020-12-17 21:27:49 -04:00
parent 93103bd18a
commit ef2cc37206
3 changed files with 63 additions and 50 deletions
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2
main.go
View File

@@ -72,5 +72,5 @@ func main() {
// fmt.Println(sixteen.PartTwo()) // fmt.Println(sixteen.PartTwo())
// Day 17 // Day 17
fmt.Println(seventeen.PartOne()) fmt.Println(seventeen.PartTwo())
} }

100
seventeen/day_seventeen.go
View File

@@ -7,7 +7,7 @@ import (
) )
type pocket struct { type pocket struct {
dimension [][][]bool dimension [][][][]bool
} }
func (p *pocket) initialize(filename string) error { func (p *pocket) initialize(filename string) error {
@@ -20,16 +20,18 @@ func (p *pocket) initialize(filename string) error {
scanner := bufio.NewScanner(file) scanner := bufio.NewScanner(file)
y := 0 y := 0
z := 0 z := 0
p.dimension = [][][]bool{} w := 0
p.dimension = append(p.dimension, [][]bool{}) p.dimension = [][][][]bool{}
p.dimension = append(p.dimension, [][][]bool{})
p.dimension[w] = append(p.dimension[w], [][]bool{})
for scanner.Scan() { for scanner.Scan() {
p.dimension[z] = append(p.dimension[z], []bool{}) p.dimension[w][z] = append(p.dimension[w][z], []bool{})
for _, c := range scanner.Text() { for _, c := range scanner.Text() {
switch string(c) { switch string(c) {
case "#": case "#":
p.dimension[z][y] = append(p.dimension[z][y], true) p.dimension[w][z][y] = append(p.dimension[w][z][y], true)
case ".": case ".":
p.dimension[z][y] = append(p.dimension[z][y], false) p.dimension[w][z][y] = append(p.dimension[w][z][y], false)
} }
} }
y++ y++
@@ -41,11 +43,13 @@ func (p *pocket) initialize(filename string) error {
func (p *pocket) active() int { func (p *pocket) active() int {
count := 0 count := 0
for z := 0; z < len(p.dimension); z++ { for w := 0; w < len(p.dimension); w++ {
for y := 0; y < len(p.dimension[z]); y++ { for z := 0; z < len(p.dimension[w]); z++ {
for x := 0; x < len(p.dimension[z][y]); x++ { for y := 0; y < len(p.dimension[w][z]); y++ {
if p.dimension[z][y][x] { for x := 0; x < len(p.dimension[w][z][y]); x++ {
count++ if p.dimension[w][z][y][x] {
count++
}
} }
} }
} }
@@ -54,29 +58,34 @@ func (p *pocket) active() int {
return count return count
} }
func activation(p pocket, x, y, z int) bool { func activation(p pocket, x, y, z, w int) bool {
activeNeighbours := 0 activeNeighbours := 0
selfActive := false selfActive := false
for zIndex := z - 1; zIndex <= z+1; zIndex++ { for wIndex := w - 1; wIndex <= w+1; wIndex++ {
if zIndex < 0 || zIndex >= len(p.dimension) { if wIndex < 0 || wIndex >= len(p.dimension) {
continue continue
} }
for yIndex := y - 1; yIndex <= y+1; yIndex++ { for zIndex := z - 1; zIndex <= z+1; zIndex++ {
if yIndex < 0 || yIndex >= len(p.dimension[zIndex]) { if zIndex < 0 || zIndex >= len(p.dimension[wIndex]) {
continue continue
} }
for xIndex := x - 1; xIndex <= x+1; xIndex++ { for yIndex := y - 1; yIndex <= y+1; yIndex++ {
if xIndex < 0 || xIndex >= len(p.dimension[zIndex][yIndex]) { if yIndex < 0 || yIndex >= len(p.dimension[wIndex][zIndex]) {
continue continue
} }
for xIndex := x - 1; xIndex <= x+1; xIndex++ {
if xIndex < 0 || xIndex >= len(p.dimension[wIndex][zIndex][yIndex]) {
continue
}
if xIndex == x && yIndex == y && zIndex == z { if xIndex == x && yIndex == y && zIndex == z && wIndex == w {
selfActive = p.dimension[zIndex][yIndex][xIndex] selfActive = p.dimension[wIndex][zIndex][yIndex][xIndex]
continue continue
} }
if p.dimension[zIndex][yIndex][xIndex] { if p.dimension[wIndex][zIndex][yIndex][xIndex] {
activeNeighbours++ activeNeighbours++
}
} }
} }
} }
@@ -96,18 +105,20 @@ func activation(p pocket, x, y, z int) bool {
} }
func (p *pocket) print() { func (p *pocket) print() {
for z := 0; z < len(p.dimension); z++ { for w := 0; w < len(p.dimension); w++ {
fmt.Printf("\nz=%d\n", z) for z := 0; z < len(p.dimension[w]); z++ {
for y := 0; y < len(p.dimension[z]); y++ { fmt.Printf("\nz=%d, w=%d\n", z, w)
yString := "" for y := 0; y < len(p.dimension[w][z]); y++ {
for x := 0; x < len(p.dimension[z][y]); x++ { yString := ""
if p.dimension[z][y][x] { for x := 0; x < len(p.dimension[w][z][y]); x++ {
yString += "#" if p.dimension[w][z][y][x] {
} else { yString += "#"
yString += "." } else {
yString += "."
}
} }
fmt.Println(yString)
} }
fmt.Println(yString)
} }
} }
} }
@@ -117,15 +128,18 @@ func simulate(start pocket, count int) pocket {
for round := 0; round < count; round++ { for round := 0; round < count; round++ {
next := pocket{ next := pocket{
dimension: make([][][]bool, len(simulated.dimension)+2), dimension: make([][][][]bool, len(simulated.dimension)+2),
} }
for z := -1; z < len(simulated.dimension)+1; z++ { for w := -1; w < len(simulated.dimension)+1; w++ {
next.dimension[z+1] = make([][]bool, len(simulated.dimension[0])+2) next.dimension[w+1] = make([][][]bool, len(simulated.dimension[0])+2)
for y := -1; y < len(simulated.dimension[0])+1; y++ { for z := -1; z < len(simulated.dimension[0])+1; z++ {
next.dimension[z+1][y+1] = make([]bool, len(simulated.dimension[0][0])+2) next.dimension[w+1][z+1] = make([][]bool, len(simulated.dimension[0][0])+2)
for x := -1; x < len(simulated.dimension[0][0])+1; x++ { for y := -1; y < len(simulated.dimension[0][0])+1; y++ {
next.dimension[z+1][y+1][x+1] = activation(simulated, x, y, z) next.dimension[w+1][z+1][y+1] = make([]bool, len(simulated.dimension[0][0][0])+2)
for x := -1; x < len(simulated.dimension[0][0][0])+1; x++ {
next.dimension[w+1][z+1][y+1][x+1] = activation(simulated, x, y, z, w)
}
} }
} }
} }
@@ -136,8 +150,8 @@ func simulate(start pocket, count int) pocket {
return simulated return simulated
} }
// PartOne How many active cubes are left after 6 cycles // PartTwo How many active cubes are left after 6 cycles
func PartOne() string { func PartTwo() string {
p := pocket{} p := pocket{}
if err := p.initialize("seventeen/input.txt"); err != nil { if err := p.initialize("seventeen/input.txt"); err != nil {
return err.Error() return err.Error()

11
seventeen/day_seventeen_test.go
View File

@@ -22,14 +22,13 @@ func Test_dimension_simulate1(t *testing.T) {
t.Logf(err.Error()) t.Logf(err.Error())
t.FailNow() t.FailNow()
} }
p.print()
p = simulate(p, 1) p = simulate(p, 1)
p.print() p.print()
active := p.active() active := p.active()
if active != 12 { if active != 29 {
t.Logf("Expected 11 active after 1 rounds, found %d", active) t.Logf("Expected 29 active after 1 rounds, found %d", active)
t.FailNow() t.FailNow()
} }
} }
@@ -42,10 +41,10 @@ func Test_dimension_simulate(t *testing.T) {
} }
p = simulate(p, 6) p = simulate(p, 6)
p.print()
active := p.active() active := p.active()
if active != 112 { if active != 848 {
t.Logf("Expected 112 active after 6 rounds, found %d", active) t.Logf("Expected 848 active after 6 rounds, found %d", active)
t.FailNow() t.FailNow()
} }
} }