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2021 Day 20 Complete

This commit is contained in:
Brian Buller 2021-12-20 14:56:51 -06:00
parent 91595691b5
commit c7e4c2eb17
7 changed files with 1252 additions and 8 deletions
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856
2021/day19/input Normal file
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--- scanner 0 ---
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--- scanner 1 ---
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--- scanner 9 ---
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--- scanner 10 ---
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--- scanner 11 ---
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--- scanner 12 ---
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--- scanner 13 ---
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--- scanner 14 ---
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--- scanner 15 ---
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--- scanner 16 ---
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--- scanner 18 ---
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--- scanner 19 ---
878,378,296
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--- scanner 20 ---
557,-760,464
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--- scanner 21 ---
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--- scanner 22 ---
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--- scanner 23 ---
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--- scanner 24 ---
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--- scanner 25 ---
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--- scanner 26 ---
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--- scanner 27 ---
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--- scanner 28 ---
875,474,732
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--- scanner 29 ---
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--- scanner 30 ---
850,573,-382
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7
2021/day19/main.go Normal file
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package main
import "fmt"
func main() {
fmt.Println("vim-go")
}

136
2021/day19/testinput Normal file
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--- scanner 0 ---
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--- scanner 1 ---
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--- scanner 2 ---
649,640,665
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--- scanner 3 ---
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--- scanner 4 ---
727,592,562
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441,611,-461
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30,-46,-14

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55
2021/day20/main.go Normal file
View File

@ -0,0 +1,55 @@
package main
import (
"fmt"
h "git.bullercodeworks.com/brian/adventofcode/helpers"
)
func main() {
inp := h.StdinToStringSlice()
enhancement, inputImage := inp[0], h.StringSliceToCoordByteMap(inp[2:])
fmt.Println("# Part 1")
run(inputImage, enhancement, 2)
fmt.Println()
fmt.Println("# Part 2")
run(inputImage, enhancement, 50)
}
func run(image h.CoordByteMap, enhancement string, iters int) {
bg := byte('.')
for i := 0; i < iters; i++ {
image = enhance(image, enhancement, bg)
if bg == '#' {
bg = enhancement[511]
} else {
bg = enhancement[0]
}
}
fmt.Println("Lit pixels:", image.Count('#'))
}
func enhance(image h.CoordByteMap, enhancement string, bg byte) h.CoordByteMap {
pxToInt := func(c h.Coordinate) int {
var num int
for bldY := c.Y - 1; bldY <= c.Y+1; bldY++ {
for bldX := c.X - 1; bldX <= c.X+1; bldX++ {
num = num << 1
v := image.Opt(h.Coordinate{X: bldX, Y: bldY}, bg)
if v == '#' {
num |= 1
}
}
}
return num
}
next := h.NewCoordByteMap()
for y := image.TLY - 1; y <= image.BRY+1; y++ {
for x := image.TLX - 1; x <= image.BRX+1; x++ {
c := h.Coordinate{X: x, Y: y}
nv := enhancement[pxToInt(c)]
next.Put(c, nv)
}
}
return next
}

7
2021/day20/testinput Normal file
View File

@ -0,0 +1,7 @@
..#.#..#####.#.#.#.###.##.....###.##.#..###.####..#####..#....#..#..##..###..######.###...####..#..#####..##..#.#####...##.#.#..#.##..#.#......#.###.######.###.####...#.##.##..#..#..#####.....#.#....###..#.##......#.....#..#..#..##..#...##.######.####.####.#.#...#.......#..#.#.#...####.##.#......#..#...##.#.##..#...##.#.##..###.#......#.#.......#.#.#.####.###.##...#.....####.#..#..#.##.#....##..#.####....##...##..#...#......#.#.......#.......##..####..#...#.#.#...##..#.#..###..#####........#..####......#..#
#..#.
#....
##..#
..#..
..###

97
helpers/coordinateByteMap.go
View File

@ -1,22 +1,43 @@
package aoc
import "fmt"
type CoordByteMap struct {
Field map[Coordinate]byte
Height int
Width int
// The Top-Left-most X/Y
TLX, TLY int
// The Bottom-Right-most X/Y
BRX, BRY int
}
func NewCoordByteMap() CoordByteMap {
return CoordByteMap{
Field: make(map[Coordinate]byte),
}
}
func StringSliceToCoordByteMap(input []string) CoordByteMap {
ret := CoordByteMap{
Field: make(map[Coordinate]byte),
Height: len(input),
Width: 0,
}
for y := range input {
for x := range input[y] {
ret.Field[Coordinate{X: x, Y: y}] = input[y][x]
if x+1 > ret.Width {
ret.Width = x + 1
ret.Put(Coordinate{X: x, Y: y}, input[y][x])
}
}
return ret
}
func (m *CoordByteMap) Count(b byte) int {
var ret int
for y := m.TLY; y <= m.BRY; y++ {
for x := m.TLX; x <= m.BRX; x++ {
if m.Get(Coordinate{X: x, Y: y}) == b {
ret++
}
}
}
@ -38,19 +59,79 @@ func (m *CoordByteMap) Opt(pos Coordinate, def byte) byte {
}
func (m *CoordByteMap) Put(pos Coordinate, val byte) {
if pos.X < m.TLX {
m.TLX = pos.X
}
if pos.Y < m.TLY {
m.TLY = pos.Y
}
if pos.X > m.BRX {
m.BRX = pos.X
}
if pos.Y > m.BRY {
m.BRY = pos.Y
}
m.Field[pos] = val
if pos.X+1 > m.Width {
m.Width = pos.X + 1
m.Width = m.BRX - m.TLX + 1
}
if pos.Y+1 > m.Height {
m.Height = pos.Y + 1
m.Height = m.BRY - m.TLY + 1
}
}
func (m *CoordByteMap) GrowNorth(size int, val byte) {
tlY := m.TLY - 1
for x := m.TLX; x <= m.BRX; x++ {
m.Put(Coordinate{X: x, Y: tlY}, val)
}
}
func (m *CoordByteMap) GrowEast(size int, val byte) {
brX := m.BRX + 1
for y := m.TLY; y <= m.BRY; y++ {
m.Put(Coordinate{X: brX, Y: y}, val)
}
}
func (m *CoordByteMap) GrowSouth(size int, val byte) {
tlY := m.BRY + 1
for x := m.TLX; x <= m.BRX; x++ {
m.Put(Coordinate{X: x, Y: tlY}, val)
}
}
func (m *CoordByteMap) GrowWest(size int, val byte) {
brX := m.TLX - 1
for y := m.TLY; y <= m.BRY; y++ {
m.Put(Coordinate{X: brX, Y: y}, val)
}
}
// This grows the map in all directions
func (m *CoordByteMap) Grow(size int, val byte) {
m.GrowNorth(size, val)
m.GrowEast(size, val)
m.GrowSouth(size, val)
m.GrowWest(size, val)
}
// Runs the passed function on every point in the map
// returning a new bytemap
func (m CoordByteMap) Map(l func(c Coordinate, in byte) byte) CoordByteMap {
i := m
for y := m.TLY; y <= m.BRY; y++ {
for x := m.TLX; x <= m.BRX; x++ {
c := Coordinate{X: x, Y: y}
nV := l(c, m.Get(c))
fmt.Println("MAP: Putting", string(nV), "at", c)
i.Put(c, l(c, m.Get(c)))
}
}
return i
}
func (m CoordByteMap) String() string {
var ret string
for y := 0; y <= m.Height; y++ {
for x := 0; x <= m.Width; x++ {
for y := m.TLY; y <= m.BRY; y++ {
for x := m.TLX; x <= m.BRX; x++ {
ret = ret + string(m.Field[Coordinate{X: x, Y: y}])
}
ret = ret + "\n"