2022 Day 17 Complete

This commit is contained in:
Brian Buller 2022-12-27 14:55:45 -06:00
parent 147602a52f
commit 48f30b8e42
2 changed files with 122 additions and 295 deletions

View File

@ -2,8 +2,7 @@ package main
import ( import (
"fmt" "fmt"
"os" "image"
"time"
h "git.bullercodeworks.com/brian/adventofcode/helpers" h "git.bullercodeworks.com/brian/adventofcode/helpers"
) )
@ -26,269 +25,62 @@ var (
func main() { func main() {
inp := h.StdinToString() inp := h.StdinToString()
//fmt.Println("# Part 1") rocks := [][]image.Point{
//simulate(inp, 2022) {{0, 0}, {1, 0}, {2, 0}, {3, 0}},
fmt.Println("# Part 2") {{1, 2}, {0, 1}, {1, 1}, {2, 1}, {1, 0}},
simulate(inp, 1000000000000) {{2, 2}, {2, 1}, {0, 0}, {1, 0}, {2, 0}},
} {{0, 3}, {0, 2}, {0, 1}, {0, 0}},
{{0, 1}, {1, 1}, {0, 0}, {1, 0}},
func stateAndSleep(m *h.GrowUpCoordByteMap) {
if !debug {
return
} }
fmt.Print(h.CLEAR_SCREEN) grid := map[image.Point]struct{}{}
//fmt.Println() move := func(rock []image.Point, delta image.Point) bool {
fmt.Println(m) nrock := make([]image.Point, len(rock))
time.Sleep(time.Second / 10) for i, p := range rock {
} p = p.Add(delta)
if _, ok := grid[p]; ok || p.X < 0 || p.X >= 7 || p.Y < 0 {
var cache map[string][]int return false
func simulate(jets string, numRocks int) {
cache = make(map[string][]int)
m := h.NewGrowUpCoordByteMap()
m.PutBytes([][]byte{
bottomRow, emptyRow, emptyRow, emptyRow, emptyRow,
emptyRow, emptyRow, emptyRow,
}, h.Coordinate{X: 0, Y: 0})
m.StringEmptyIsSpace = true
jetIdx := 0
rockType := 0
var state string
var height int
var turboHeight int
var cacheDisabled bool
for rockNum := 1; rockNum <= numRocks; rockNum++ {
fmt.Println(h.CLEAR_SCREEN)
fmt.Println("Simulating:", rockNum, "/", numRocks)
h.PrintProgress(rockNum, numRocks)
fmt.Println("\nHeight:", height)
if !cacheDisabled {
state, height = GetState(rockType, jetIdx, m)
if v, ok := cache[state]; !cacheDisabled && ok {
// Ok, we've got a duplicate. Go full turbo.
//addHeight := height
mult := numRocks / rockNum
newRockNum := rockNum * mult
turboHeight = height * mult
/*
for rockNum+v[1] <= numRocks {
rockNum = rockNum + v[1]
height = height + addHeight
fmt.Println(h.CLEAR_SCREEN)
fmt.Println("Simulating:", rockNum, "/", numRocks)
h.PrintProgress(rockNum, numRocks)
fmt.Println("\nHeight:", height)
}
*/
fmt.Println(h.CLEAR_SCREEN)
fmt.Println("Simulating:", rockNum, "/", numRocks)
h.PrintProgress(rockNum, numRocks)
fmt.Println("\nHeight:", height)
fmt.Println("State", state, "\nV:", v, "\nMult:", mult, "\nRockNum:", rockNum, "\nNewRockNum:", newRockNum, "\nTurboHeight:", turboHeight)
cacheDisabled = true
os.Exit(0)
} else {
cache[state] = []int{rockNum, height}
} }
} else { nrock[i] = p
fmt.Println("\nHeight:", turboHeight+GetHeight(m)) }
copy(rock, nrock)
return true
}
cache := map[[2]int][]int{}
height, jet := 0, 0
for i := 0; i < 1000000000000; i++ {
if i == 2022 {
fmt.Println("# Part 1")
fmt.Println(height)
fmt.Println()
}
k := [2]int{i % len(rocks), jet}
if c, ok := cache[k]; ok {
if n, d := 1000000000000-i, i-c[0]; n%d == 0 {
fmt.Println("# Part 2")
fmt.Println(height + n/d*(height-c[1]))
break
}
}
cache[k] = []int{i, height}
rock := []image.Point{}
for _, p := range rocks[i%len(rocks)] {
rock = append(rock, p.Add(image.Point{2, height + 3}))
} }
AddFallingRock(rockType, m)
stateAndSleep(m)
doJet := true
for { for {
if !doJet && AtRest(m) { move(rock, image.Point{int(inp[jet]) - int('='), 0})
break jet = (jet + 1) % len(inp)
}
shiftDir := dirD if !move(rock, image.Point{0, -1}) {
if doJet { for _, p := range rock {
switch jets[jetIdx] { grid[p] = struct{}{}
case '>': if p.Y+1 > height {
shiftDir = dirR height = p.Y + 1
case '<': }
shiftDir = dirL
} }
jetIdx = (jetIdx + 1) % len(jets)
}
ShiftRock(shiftDir, m)
stateAndSleep(m)
doJet = !doJet
}
// The falling rock has stopped
StopRock(m)
stateAndSleep(m)
rockType = (rockType + 1) % rocks
}
fmt.Println("After", numRocks, "the tower is", GetHeight(m), "blocks tall")
}
func GetState(r, j int, m *h.GrowUpCoordByteMap) (string, int) {
ret := fmt.Sprintf("%d;%d;", r, j)
for x := 1; x < 7; x++ {
for y := m.TLY; y > 1; y-- {
if m.Get(h.Coordinate{X: x, Y: y}) == '#' {
ret = fmt.Sprintf("%s-%d", ret, m.TLY-y)
break break
} }
} }
} }
return ret, GetHeight(m)
}
func GetHeight(m *h.GrowUpCoordByteMap) int {
return h.GetHighestY(m.FindAll('#')...)
}
func FindTopAtRestY(m *h.GrowUpCoordByteMap) int {
rockSpots := m.FindAll('#')
if len(rockSpots) != 0 {
return h.GetHighestY(rockSpots...)
}
return 0
}
func StopRock(m *h.GrowUpCoordByteMap) {
rockSpots := m.FindAll('@')
for i := range rockSpots {
m.Put(rockSpots[i], '#')
}
}
func ShiftRock(dir int, m *h.GrowUpCoordByteMap) {
if !CanShift(dir, m) {
return
}
rockSpots := m.FindAll('@')
for i := range rockSpots {
m.Put(rockSpots[i], ' ')
}
for i := range rockSpots {
switch dir {
case dirU:
m.Put(GetUp(rockSpots[i]), '@')
case dirR:
m.Put(GetRight(rockSpots[i]), '@')
case dirD:
m.Put(GetDown(rockSpots[i]), '@')
case dirL:
m.Put(GetLeft(rockSpots[i]), '@')
}
}
}
func CanShift(dir int, m *h.GrowUpCoordByteMap) bool {
rockSpots := m.FindAll('@')
switch dir {
case dirU: // Shouldn't need to, though.
return true
case dirR:
for i := range rockSpots {
tst := m.Get(GetRight(rockSpots[i]))
if tst != '@' && tst != ' ' {
return false
}
}
return true
case dirD:
for i := range rockSpots {
tst := m.Get(GetDown(rockSpots[i]))
if tst != '@' && tst != ' ' {
return false
}
}
return true
case dirL:
for i := range rockSpots {
tst := m.Get(GetLeft(rockSpots[i]))
if tst != '@' && tst != ' ' {
return false
}
}
return true
}
return false
}
func AddFallingRock(tp int, m *h.GrowUpCoordByteMap) {
rock := GetRockBytes(tp)
pos := h.Coordinate{X: 3, Y: FindTopAtRestY(m) + 4}
for pos.Y+3 > m.TLY {
m.PutBytes([][]byte{emptyRow}, h.Coordinate{X: 0, Y: m.TLY + 1})
}
m.PutBytes(rock, pos)
}
func AtRest(m *h.GrowUpCoordByteMap) bool {
rockSpots := m.FindAll('@')
if len(rockSpots) == 0 {
return true
}
for i := range rockSpots {
pos := GetDown(rockSpots[i])
wrk := m.Get(pos)
if pos.Y == m.BRY {
return true
}
if wrk != ' ' && wrk != '@' {
return true
}
}
return false
}
func GetRockBytes(tp int) [][]byte {
switch tp {
case 0:
return [][]byte{{'@', '@', '@', '@'}}
case 1:
return [][]byte{
{' ', '@', ' '},
{'@', '@', '@'},
{' ', '@', ' '},
}
case 2:
return [][]byte{
{'@', '@', '@'},
{' ', ' ', '@'},
{' ', ' ', '@'},
}
case 3:
return [][]byte{
{'@'},
{'@'},
{'@'},
{'@'},
}
case 4:
return [][]byte{
{'@', '@'},
{'@', '@'},
}
}
return [][]byte{}
}
func GetLeft(c h.Coordinate) h.Coordinate {
return h.Coordinate{X: c.X - 1, Y: c.Y}
}
func GetRight(c h.Coordinate) h.Coordinate {
return h.Coordinate{X: c.X + 1, Y: c.Y}
}
func GetUp(c h.Coordinate) h.Coordinate {
return h.Coordinate{X: c.X, Y: c.Y + 1}
}
func GetDown(c h.Coordinate) h.Coordinate {
return h.Coordinate{X: c.X, Y: c.Y - 1}
}
func DirToString(shiftDir int) string {
switch shiftDir {
case dirU:
return "^"
case dirR:
return ">"
case dirD:
return "v"
case dirL:
return "<"
}
return " "
} }

View File

@ -1,4 +1,4 @@
Advent of Code Advent of Code
• [About] • [About]
• [Events] • [Events]
@ -6,9 +6,9 @@
• [Settings] • [Settings]
• [Log Out] • [Log Out]
br0xen (AoC++) 32* br0xen (AoC++) 43*
   sub y{2022}   {year=>2022}
• [Calendar] • [Calendar]
• [AoC++] • [AoC++]
@ -17,20 +17,23 @@
• [Stats] • [Stats]
Our sponsors help make Advent of Code possible: Our sponsors help make Advent of Code possible:
Smarty - Join our private leaderboard and solve our puzzles for BIG PRIZES!!! ----------------- Address Validation Teradyne - Do you like coding algorithms where milliseconds matter?
and Autocomplete, and more! What about nanoseconds?
--- Day 17: Pyroclastic Flow --- --- Day 17: Pyroclastic Flow ---
Your handheld device has located an alternative exit from the cave for you and the elephants. The ground is Your handheld device has located an alternative exit from the cave
rumbling almost continuously now, but the strange valves bought you some time. It's definitely getting warmer in for you and the elephants. The ground is rumbling almost
here, though. continuously now, but the strange valves bought you some time. It's
definitely getting warmer in here, though.
The tunnels eventually open into a very tall, narrow chamber. Large, oddly-shaped rocks are falling into the The tunnels eventually open into a very tall, narrow chamber. Large,
chamber from above, presumably due to all the rumbling. If you can't work out where the rocks will fall next, you oddly-shaped rocks are falling into the chamber from above,
might be crushed! presumably due to all the rumbling. If you can't work out where the
rocks will fall next, you might be crushed!
The five types of rocks have the following peculiar shapes, where # is rock and . is empty space: The five types of rocks have the following peculiar shapes, where #
is rock and . is empty space:
#### ####
@ -50,31 +53,40 @@
## ##
## ##
The rocks fall in the order shown above: first the - shape, then the + shape, and so on. Once the end of the list The rocks fall in the order shown above: first the - shape, then the
is reached, the same order repeats: the - shape falls first, sixth, 11th, 16th, etc. + shape, and so on. Once the end of the list is reached, the same
order repeats: the - shape falls first, sixth, 11th, 16th, etc.
The rocks don't spin, but they do get pushed around by jets of hot gas coming out of the walls themselves. A quick The rocks don't spin, but they do get pushed around by jets of hot
scan reveals the effect the jets of hot gas will have on the rocks as they fall (your puzzle input). gas coming out of the walls themselves. A quick scan reveals the
effect the jets of hot gas will have on the rocks as they fall (your
puzzle input).
For example, suppose this was the jet pattern in your cave: For example, suppose this was the jet pattern in your cave:
>>><<><>><<<>><>>><<<>>><<<><<<>><>><<>> >>><<><>><<<>><>>><<<>>><<<><<<>><>><<>>
In jet patterns, < means a push to the left, while > means a push to the right. The pattern above means that the In jet patterns, < means a push to the left, while > means a push to
jets will push a falling rock right, then right, then right, then left, then left, then right, and so on. If the the right. The pattern above means that the jets will push a falling
end of the list is reached, it repeats. rock right, then right, then right, then left, then left, then
right, and so on. If the end of the list is reached, it repeats.
The tall, vertical chamber is exactly seven units wide. Each rock appears so that its left edge is two units away The tall, vertical chamber is exactly seven units wide. Each rock
from the left wall and its bottom edge is three units above the highest rock in the room (or the floor, if there appears so that its left edge is two units away from the left wall
isn't one). and its bottom edge is three units above the highest rock in the
room (or the floor, if there isn't one).
After a rock appears, it alternates between being pushed by a jet of hot gas one unit (in the direction indicated After a rock appears, it alternates between being pushed by a jet of
by the next symbol in the jet pattern) and then falling one unit down. If any movement would cause any part of the hot gas one unit (in the direction indicated by the next symbol in
rock to move into the walls, floor, or a stopped rock, the movement instead does not occur. If a downward movement the jet pattern) and then falling one unit down. If any movement
would have caused a falling rock to move into the floor or an already-fallen rock, the falling rock stops where it would cause any part of the rock to move into the walls, floor, or a
is (having landed on something) and a new rock immediately begins falling. stopped rock, the movement instead does not occur. If a downward
movement would have caused a falling rock to move into the floor or
an already-fallen rock, the falling rock stops where it is (having
landed on something) and a new rock immediately begins falling.
Drawing falling rocks with @ and stopped rocks with #, the jet pattern in the example above manifests as follows: Drawing falling rocks with @ and stopped rocks with #, the jet
pattern in the example above manifests as follows:
The first rock begins falling: The first rock begins falling:
|..@@@@.| |..@@@@.|
@ -212,7 +224,8 @@
|..####.| |..####.|
+-------+ +-------+
The moment each of the next few rocks begins falling, you would see this: The moment each of the next few rocks begins falling, you would see
this:
|..@....| |..@....|
|..@....| |..@....|
@ -368,15 +381,36 @@
|..####.| |..####.|
+-------+ +-------+
To prove to the elephants your simulation is accurate, they want to know how tall the tower will get after 2022 To prove to the elephants your simulation is accurate, they want to
rocks have stopped (but before the 2023rd rock begins falling). In this example, the tower of rocks will be 3068 know how tall the tower will get after 2022 rocks have stopped (but
units tall. before the 2023rd rock begins falling). In this example, the tower
of rocks will be 3068 units tall.
How many units tall will the tower of rocks be after 2022 rocks have stopped falling? How many units tall will the tower of rocks be after 2022 rocks have
stopped falling?
To begin, get your puzzle input. Your puzzle answer was 3081.
Answer: _____________________ [ [Submit] ] --- Part Two ---
The elephants are not impressed by your simulation. They demand to
know how tall the tower will be after 1000000000000 rocks have
stopped! Only then will they feel confident enough to proceed
through the cave.
In the example above, the tower would be 1514285714288 units tall!
How tall will the tower be after 1000000000000 rocks have stopped?
Your puzzle answer was 1524637681145.
Both parts of this puzzle are complete! They provide two gold stars:
**
At this point, you should return to your Advent calendar and try
another puzzle.
If you still want to see it, you can get your puzzle input.
You can also [Shareon Twitter Mastodon] this puzzle. You can also [Shareon Twitter Mastodon] this puzzle.
@ -398,7 +432,8 @@ References
. https://adventofcode.com/2022/leaderboard . https://adventofcode.com/2022/leaderboard
. https://adventofcode.com/2022/stats . https://adventofcode.com/2022/stats
. https://adventofcode.com/2022/sponsors . https://adventofcode.com/2022/sponsors
. https://www.smarty.com/advent-of-code . https://jobs.teradyne.com/?utm_source=adventofcode&utm_medium=ad&utm_campaign=2022
. https://adventofcode.com/2022
. https://adventofcode.com/2022/day/17/input . https://adventofcode.com/2022/day/17/input
. https://twitter.com/intent/tweet?text=%22Pyroclastic+Flow%22+%2D+Day+17+%2D+Advent+of+Code+2022&url=https%3A%2F%2Fadventofcode%2Ecom%2F2022%2Fday%2F17&related=ericwastl&hashtags=AdventOfCode . https://twitter.com/intent/tweet?text=I%27ve+completed+%22Pyroclastic+Flow%22+%2D+Day+17+%2D+Advent+of+Code+2022&url=https%3A%2F%2Fadventofcode%2Ecom%2F2022%2Fday%2F17&related=ericwastl&hashtags=AdventOfCode
. javascript:void(0); . javascript:void(0);