2022 Day 17 Complete
This commit is contained in:
parent
147602a52f
commit
48f30b8e42
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@ -2,8 +2,7 @@ package main
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import (
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"fmt"
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"os"
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"time"
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"image"
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h "git.bullercodeworks.com/brian/adventofcode/helpers"
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)
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@ -26,269 +25,62 @@ var (
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func main() {
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inp := h.StdinToString()
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//fmt.Println("# Part 1")
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//simulate(inp, 2022)
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fmt.Println("# Part 2")
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simulate(inp, 1000000000000)
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}
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func stateAndSleep(m *h.GrowUpCoordByteMap) {
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if !debug {
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return
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rocks := [][]image.Point{
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{{0, 0}, {1, 0}, {2, 0}, {3, 0}},
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{{1, 2}, {0, 1}, {1, 1}, {2, 1}, {1, 0}},
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{{2, 2}, {2, 1}, {0, 0}, {1, 0}, {2, 0}},
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{{0, 3}, {0, 2}, {0, 1}, {0, 0}},
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{{0, 1}, {1, 1}, {0, 0}, {1, 0}},
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}
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fmt.Print(h.CLEAR_SCREEN)
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//fmt.Println()
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fmt.Println(m)
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time.Sleep(time.Second / 10)
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}
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var cache map[string][]int
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func simulate(jets string, numRocks int) {
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cache = make(map[string][]int)
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m := h.NewGrowUpCoordByteMap()
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m.PutBytes([][]byte{
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bottomRow, emptyRow, emptyRow, emptyRow, emptyRow,
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emptyRow, emptyRow, emptyRow,
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}, h.Coordinate{X: 0, Y: 0})
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m.StringEmptyIsSpace = true
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jetIdx := 0
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rockType := 0
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var state string
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var height int
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var turboHeight int
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var cacheDisabled bool
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for rockNum := 1; rockNum <= numRocks; rockNum++ {
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fmt.Println(h.CLEAR_SCREEN)
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fmt.Println("Simulating:", rockNum, "/", numRocks)
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h.PrintProgress(rockNum, numRocks)
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fmt.Println("\nHeight:", height)
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if !cacheDisabled {
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state, height = GetState(rockType, jetIdx, m)
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if v, ok := cache[state]; !cacheDisabled && ok {
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// Ok, we've got a duplicate. Go full turbo.
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//addHeight := height
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mult := numRocks / rockNum
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newRockNum := rockNum * mult
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turboHeight = height * mult
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/*
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for rockNum+v[1] <= numRocks {
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rockNum = rockNum + v[1]
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height = height + addHeight
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fmt.Println(h.CLEAR_SCREEN)
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fmt.Println("Simulating:", rockNum, "/", numRocks)
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h.PrintProgress(rockNum, numRocks)
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fmt.Println("\nHeight:", height)
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}
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*/
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fmt.Println(h.CLEAR_SCREEN)
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fmt.Println("Simulating:", rockNum, "/", numRocks)
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h.PrintProgress(rockNum, numRocks)
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fmt.Println("\nHeight:", height)
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fmt.Println("State", state, "\nV:", v, "\nMult:", mult, "\nRockNum:", rockNum, "\nNewRockNum:", newRockNum, "\nTurboHeight:", turboHeight)
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cacheDisabled = true
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os.Exit(0)
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} else {
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cache[state] = []int{rockNum, height}
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grid := map[image.Point]struct{}{}
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move := func(rock []image.Point, delta image.Point) bool {
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nrock := make([]image.Point, len(rock))
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for i, p := range rock {
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p = p.Add(delta)
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if _, ok := grid[p]; ok || p.X < 0 || p.X >= 7 || p.Y < 0 {
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return false
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}
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} else {
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fmt.Println("\nHeight:", turboHeight+GetHeight(m))
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nrock[i] = p
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}
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copy(rock, nrock)
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return true
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}
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cache := map[[2]int][]int{}
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height, jet := 0, 0
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for i := 0; i < 1000000000000; i++ {
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if i == 2022 {
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fmt.Println("# Part 1")
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fmt.Println(height)
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fmt.Println()
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}
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k := [2]int{i % len(rocks), jet}
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if c, ok := cache[k]; ok {
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if n, d := 1000000000000-i, i-c[0]; n%d == 0 {
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fmt.Println("# Part 2")
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fmt.Println(height + n/d*(height-c[1]))
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break
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}
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}
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cache[k] = []int{i, height}
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rock := []image.Point{}
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for _, p := range rocks[i%len(rocks)] {
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rock = append(rock, p.Add(image.Point{2, height + 3}))
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}
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AddFallingRock(rockType, m)
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stateAndSleep(m)
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doJet := true
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for {
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if !doJet && AtRest(m) {
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break
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}
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shiftDir := dirD
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if doJet {
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switch jets[jetIdx] {
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case '>':
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shiftDir = dirR
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case '<':
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shiftDir = dirL
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move(rock, image.Point{int(inp[jet]) - int('='), 0})
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jet = (jet + 1) % len(inp)
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if !move(rock, image.Point{0, -1}) {
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for _, p := range rock {
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grid[p] = struct{}{}
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if p.Y+1 > height {
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height = p.Y + 1
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}
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}
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jetIdx = (jetIdx + 1) % len(jets)
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}
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ShiftRock(shiftDir, m)
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stateAndSleep(m)
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doJet = !doJet
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}
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// The falling rock has stopped
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StopRock(m)
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stateAndSleep(m)
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rockType = (rockType + 1) % rocks
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}
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fmt.Println("After", numRocks, "the tower is", GetHeight(m), "blocks tall")
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}
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func GetState(r, j int, m *h.GrowUpCoordByteMap) (string, int) {
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ret := fmt.Sprintf("%d;%d;", r, j)
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for x := 1; x < 7; x++ {
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for y := m.TLY; y > 1; y-- {
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if m.Get(h.Coordinate{X: x, Y: y}) == '#' {
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ret = fmt.Sprintf("%s-%d", ret, m.TLY-y)
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break
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}
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}
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}
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return ret, GetHeight(m)
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}
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func GetHeight(m *h.GrowUpCoordByteMap) int {
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return h.GetHighestY(m.FindAll('#')...)
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}
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func FindTopAtRestY(m *h.GrowUpCoordByteMap) int {
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rockSpots := m.FindAll('#')
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if len(rockSpots) != 0 {
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return h.GetHighestY(rockSpots...)
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}
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return 0
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}
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func StopRock(m *h.GrowUpCoordByteMap) {
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rockSpots := m.FindAll('@')
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for i := range rockSpots {
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m.Put(rockSpots[i], '#')
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}
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}
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func ShiftRock(dir int, m *h.GrowUpCoordByteMap) {
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if !CanShift(dir, m) {
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return
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}
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rockSpots := m.FindAll('@')
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for i := range rockSpots {
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m.Put(rockSpots[i], ' ')
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}
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for i := range rockSpots {
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switch dir {
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case dirU:
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m.Put(GetUp(rockSpots[i]), '@')
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case dirR:
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m.Put(GetRight(rockSpots[i]), '@')
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case dirD:
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m.Put(GetDown(rockSpots[i]), '@')
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case dirL:
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m.Put(GetLeft(rockSpots[i]), '@')
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}
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}
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}
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func CanShift(dir int, m *h.GrowUpCoordByteMap) bool {
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rockSpots := m.FindAll('@')
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switch dir {
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case dirU: // Shouldn't need to, though.
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return true
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case dirR:
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for i := range rockSpots {
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tst := m.Get(GetRight(rockSpots[i]))
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if tst != '@' && tst != ' ' {
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return false
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}
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}
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return true
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case dirD:
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for i := range rockSpots {
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tst := m.Get(GetDown(rockSpots[i]))
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if tst != '@' && tst != ' ' {
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return false
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}
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}
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return true
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case dirL:
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for i := range rockSpots {
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tst := m.Get(GetLeft(rockSpots[i]))
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if tst != '@' && tst != ' ' {
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return false
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}
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}
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return true
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}
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return false
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}
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func AddFallingRock(tp int, m *h.GrowUpCoordByteMap) {
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rock := GetRockBytes(tp)
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pos := h.Coordinate{X: 3, Y: FindTopAtRestY(m) + 4}
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for pos.Y+3 > m.TLY {
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m.PutBytes([][]byte{emptyRow}, h.Coordinate{X: 0, Y: m.TLY + 1})
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}
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m.PutBytes(rock, pos)
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}
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func AtRest(m *h.GrowUpCoordByteMap) bool {
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rockSpots := m.FindAll('@')
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if len(rockSpots) == 0 {
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return true
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}
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for i := range rockSpots {
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pos := GetDown(rockSpots[i])
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wrk := m.Get(pos)
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if pos.Y == m.BRY {
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return true
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}
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if wrk != ' ' && wrk != '@' {
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return true
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}
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}
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return false
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}
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func GetRockBytes(tp int) [][]byte {
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switch tp {
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case 0:
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return [][]byte{{'@', '@', '@', '@'}}
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case 1:
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return [][]byte{
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{' ', '@', ' '},
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{'@', '@', '@'},
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{' ', '@', ' '},
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}
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case 2:
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return [][]byte{
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{'@', '@', '@'},
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{' ', ' ', '@'},
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{' ', ' ', '@'},
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}
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case 3:
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return [][]byte{
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{'@'},
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{'@'},
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{'@'},
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{'@'},
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}
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case 4:
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return [][]byte{
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{'@', '@'},
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{'@', '@'},
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}
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}
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return [][]byte{}
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}
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func GetLeft(c h.Coordinate) h.Coordinate {
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return h.Coordinate{X: c.X - 1, Y: c.Y}
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}
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func GetRight(c h.Coordinate) h.Coordinate {
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return h.Coordinate{X: c.X + 1, Y: c.Y}
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}
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func GetUp(c h.Coordinate) h.Coordinate {
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return h.Coordinate{X: c.X, Y: c.Y + 1}
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}
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func GetDown(c h.Coordinate) h.Coordinate {
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return h.Coordinate{X: c.X, Y: c.Y - 1}
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}
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func DirToString(shiftDir int) string {
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switch shiftDir {
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case dirU:
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return "^"
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case dirR:
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return ">"
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case dirD:
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return "v"
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case dirL:
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return "<"
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}
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return " "
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}
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@ -1,4 +1,4 @@
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Advent of Code
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Advent of Code
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• [About]
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• [Events]
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@ -6,9 +6,9 @@
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• [Settings]
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• [Log Out]
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br0xen (AoC++) 32*
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br0xen (AoC++) 43*
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sub y{2022}
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{year=>2022}
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• [Calendar]
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• [AoC++]
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@ -17,20 +17,23 @@
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• [Stats]
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Our sponsors help make Advent of Code possible:
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Smarty - Join our private leaderboard and solve our puzzles for BIG PRIZES!!! ----------------- Address Validation
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and Autocomplete, and more!
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Teradyne - Do you like coding algorithms where milliseconds matter?
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What about nanoseconds?
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--- Day 17: Pyroclastic Flow ---
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Your handheld device has located an alternative exit from the cave for you and the elephants. The ground is
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rumbling almost continuously now, but the strange valves bought you some time. It's definitely getting warmer in
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here, though.
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Your handheld device has located an alternative exit from the cave
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for you and the elephants. The ground is rumbling almost
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continuously now, but the strange valves bought you some time. It's
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definitely getting warmer in here, though.
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The tunnels eventually open into a very tall, narrow chamber. Large, oddly-shaped rocks are falling into the
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chamber from above, presumably due to all the rumbling. If you can't work out where the rocks will fall next, you
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might be crushed!
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The tunnels eventually open into a very tall, narrow chamber. Large,
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oddly-shaped rocks are falling into the chamber from above,
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presumably due to all the rumbling. If you can't work out where the
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rocks will fall next, you might be crushed!
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The five types of rocks have the following peculiar shapes, where # is rock and . is empty space:
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The five types of rocks have the following peculiar shapes, where #
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is rock and . is empty space:
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####
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@ -50,31 +53,40 @@
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##
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##
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The rocks fall in the order shown above: first the - shape, then the + shape, and so on. Once the end of the list
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is reached, the same order repeats: the - shape falls first, sixth, 11th, 16th, etc.
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The rocks fall in the order shown above: first the - shape, then the
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+ shape, and so on. Once the end of the list is reached, the same
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order repeats: the - shape falls first, sixth, 11th, 16th, etc.
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The rocks don't spin, but they do get pushed around by jets of hot gas coming out of the walls themselves. A quick
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scan reveals the effect the jets of hot gas will have on the rocks as they fall (your puzzle input).
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The rocks don't spin, but they do get pushed around by jets of hot
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gas coming out of the walls themselves. A quick scan reveals the
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effect the jets of hot gas will have on the rocks as they fall (your
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puzzle input).
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For example, suppose this was the jet pattern in your cave:
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>>><<><>><<<>><>>><<<>>><<<><<<>><>><<>>
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In jet patterns, < means a push to the left, while > means a push to the right. The pattern above means that the
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jets will push a falling rock right, then right, then right, then left, then left, then right, and so on. If the
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end of the list is reached, it repeats.
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In jet patterns, < means a push to the left, while > means a push to
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the right. The pattern above means that the jets will push a falling
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rock right, then right, then right, then left, then left, then
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right, and so on. If the end of the list is reached, it repeats.
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The tall, vertical chamber is exactly seven units wide. Each rock appears so that its left edge is two units away
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from the left wall and its bottom edge is three units above the highest rock in the room (or the floor, if there
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isn't one).
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The tall, vertical chamber is exactly seven units wide. Each rock
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appears so that its left edge is two units away from the left wall
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and its bottom edge is three units above the highest rock in the
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room (or the floor, if there isn't one).
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After a rock appears, it alternates between being pushed by a jet of hot gas one unit (in the direction indicated
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by the next symbol in the jet pattern) and then falling one unit down. If any movement would cause any part of the
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rock to move into the walls, floor, or a stopped rock, the movement instead does not occur. If a downward movement
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would have caused a falling rock to move into the floor or an already-fallen rock, the falling rock stops where it
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is (having landed on something) and a new rock immediately begins falling.
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After a rock appears, it alternates between being pushed by a jet of
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hot gas one unit (in the direction indicated by the next symbol in
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the jet pattern) and then falling one unit down. If any movement
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would cause any part of the rock to move into the walls, floor, or a
|
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stopped rock, the movement instead does not occur. If a downward
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movement would have caused a falling rock to move into the floor or
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an already-fallen rock, the falling rock stops where it is (having
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landed on something) and a new rock immediately begins falling.
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Drawing falling rocks with @ and stopped rocks with #, the jet pattern in the example above manifests as follows:
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Drawing falling rocks with @ and stopped rocks with #, the jet
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pattern in the example above manifests as follows:
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The first rock begins falling:
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|..@@@@.|
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@ -212,7 +224,8 @@
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|..####.|
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+-------+
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The moment each of the next few rocks begins falling, you would see this:
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The moment each of the next few rocks begins falling, you would see
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this:
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|..@....|
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|..@....|
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@ -368,15 +381,36 @@
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|..####.|
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+-------+
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To prove to the elephants your simulation is accurate, they want to know how tall the tower will get after 2022
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rocks have stopped (but before the 2023rd rock begins falling). In this example, the tower of rocks will be 3068
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units tall.
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To prove to the elephants your simulation is accurate, they want to
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know how tall the tower will get after 2022 rocks have stopped (but
|
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before the 2023rd rock begins falling). In this example, the tower
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of rocks will be 3068 units tall.
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How many units tall will the tower of rocks be after 2022 rocks have stopped falling?
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How many units tall will the tower of rocks be after 2022 rocks have
|
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stopped falling?
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To begin, get your puzzle input.
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Your puzzle answer was 3081.
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Answer: _____________________ [ [Submit] ]
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--- Part Two ---
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The elephants are not impressed by your simulation. They demand to
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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.
|
||||
|
||||
|
|
@ -398,7 +432,8 @@ References
|
|||
. https://adventofcode.com/2022/leaderboard
|
||||
. https://adventofcode.com/2022/stats
|
||||
. 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://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);
|
||||
|
|
|
|||
Loading…
Reference in New Issue