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d09a8af5db
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3128ab673f
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package day14
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import (
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"fmt"
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"log"
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"os"
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"strings"
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)
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func Run() int {
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fmt.Println("hello day 14")
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field := ReadPlatform("day14/input")
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fmt.Println(field.String())
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// fmt.Printf("> lines for field %+v\n", field.UpIndices())
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// field.Move(field.Height(), field.UpIndices())
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cycles := 1000000000
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states := make(map[string]int)
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// 2023/12/14 11:50:32 >>> found loop. known state after 10 equal to one after 3
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var loopLen, initialStretch int
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for i := 1; i <= cycles; i++ {
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field.DoSpinCycle()
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// fmt.Println(field.String())
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stringRepr := field.String()
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prevIter, known := states[stringRepr]
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if known {
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log.Printf(">>> found loop. known state after %d equal to one after %d", i, prevIter)
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initialStretch = prevIter
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loopLen = i - prevIter
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break
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}
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states[stringRepr] = i
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if i % 100000 == 0 {
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log.Print("done ", i, " cycles")
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}
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}
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// field is already in a 'loop' state.
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// so we've already done 'initial stretch' so to make field in same state as after 'cycles'
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// i only need to check rest of (cycles - initialStretch)
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movesToMake := (cycles - initialStretch)%loopLen
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log.Printf(">>> data: initial steps %d, loop len %d. to do same as %d iterations i need %d", initialStretch, loopLen, cycles, movesToMake)
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for i := 1; i <= movesToMake; i++ {
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field.DoSpinCycle()
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// fmt.Println(field.String())
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}
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// north rock load
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return field.NorthLoad()
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}
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const Rock rune = 'O'
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const Wall rune = '#'
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const Space rune = '.'
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type Platform struct {
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Rocks [][]rune
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}
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func (p *Platform) Height() int {
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return len(p.Rocks)
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}
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func (p *Platform) Width() int {
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return len(p.Rocks[0])
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}
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func ReadPlatform(filename string) Platform {
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bytes, err := os.ReadFile(filename)
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if err != nil {
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panic(fmt.Sprint("cannot read file: ", filename))
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}
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text := string(bytes)
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text = strings.TrimSpace(text)
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lines := strings.Split(text, "\n")
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rocks := make([][]rune, len(lines))
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for i, line := range lines {
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rocks[i] = []rune(line)
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}
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return Platform{
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Rocks: rocks,
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}
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}
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func (p *Platform) String() string {
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text := "\n"
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for _, row := range p.Rocks {
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text += string(row)
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text += "\n"
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}
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return text
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}
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type Coord struct{ Row, Col int }
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// indices for moving UP, from down to up
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func (p *Platform) UpIndices() [][]Coord {
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lines := make([][]Coord, 0)
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for col := 0; col < p.Width(); col++ {
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line := make([]Coord, 0)
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for row := 0; row < p.Height(); row++ {
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line = append(line, Coord{Row: row, Col: col})
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}
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lines = append(lines, line)
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}
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return lines
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}
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// indices for moving DOWN, from up to down
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func (p *Platform) DownIndices() [][]Coord {
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lines := make([][]Coord, 0)
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for col := 0; col < p.Width(); col++ {
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line := make([]Coord, 0)
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for row := p.Height() - 1; row >= 0; row-- {
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line = append(line, Coord{Row: row, Col: col})
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}
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lines = append(lines, line)
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}
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return lines
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}
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// indices for moving RIGHT from right to left
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func (p *Platform) RightIndices() [][]Coord {
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lines := make([][]Coord, 0)
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for row := 0; row < p.Height(); row++ {
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line := make([]Coord, 0)
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for col := p.Width() - 1; col >= 0; col-- {
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line = append(line, Coord{Row: row, Col: col})
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}
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lines = append(lines, line)
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}
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return lines
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}
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// indices for moving LEFT, from left to right
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func (p *Platform) LeftIndices() [][]Coord {
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lines := make([][]Coord, 0)
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for row := 0; row < p.Height(); row++ {
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line := make([]Coord, 0)
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for col := 0; col < p.Width(); col++ {
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line = append(line, Coord{Row: row, Col: col})
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}
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lines = append(lines, line)
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}
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return lines
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}
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func (p *Platform) SymbAt(coord Coord) rune {
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return p.Rocks[coord.Row][coord.Col]
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}
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func (p *Platform) SetSymbAt(coord Coord, symb rune) {
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p.Rocks[coord.Row][coord.Col] = symb
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}
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func (p *Platform) Move(n int, lines [][]Coord) {
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for _, line := range lines {
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moveSize := 0
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for i, coord := range line {
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symb := p.SymbAt(coord)
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switch symb {
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case Space:
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moveSize += 1
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if moveSize > n {
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moveSize = n
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}
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case Wall:
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moveSize = 0
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case Rock:
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if moveSize == 0 {
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continue
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}
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// get coord for moveSize back. and set that to 'o'
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// and set current to '.'
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// panic if that place is not '.' i guess
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moveTo := line[i-moveSize]
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symbAtTarget := p.SymbAt(moveTo)
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if symbAtTarget != Space {
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panic(fmt.Sprintf("attempting to move %+v to %+v, target symbol is %s, not '.'",
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coord, moveTo, string(symbAtTarget)))
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}
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p.SetSymbAt(moveTo, Rock)
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p.SetSymbAt(coord, Space)
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}
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}
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}
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}
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func (p *Platform) NorthLoad() int {
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total := 0
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height := p.Height()
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for i, row := range p.Rocks {
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for _, symb := range row {
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if symb == Rock {
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total += (height - i)
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}
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}
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}
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return total
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}
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func (p *Platform) DoSpinCycle() {
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// north, west, south, east - till the end
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p.Move(p.Height(), p.UpIndices())
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p.Move(p.Width(), p.LeftIndices())
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p.Move(p.Height(), p.DownIndices())
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p.Move(p.Width(), p.RightIndices())
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}
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@ -1,10 +0,0 @@
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O....#....
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O.OO#....#
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.....##...
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OO.#O....O
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.O.....O#.
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O.#..O.#.#
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..O..#O..O
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.......O..
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#....###..
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#OO..#....
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100
day14/input
100
day14/input
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@ -1,100 +0,0 @@
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O...#.O......#...##....O#.#.OO...O.#OO#.....#O.O.....#......#.OO...O...O..O#O#....#...O..O...O.....O
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.OO......O.OO.O.#.#O.O...#.##OO.....#.#O#...OOOOO..##O#O..O#O.##O...#O....O#.#.OO....#.........O.O.O
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......O.O.O.....O.#.#.#OO#O#.O...O.#.......#O....#.O.#....OOO...#....O#O.......#......O...O##...O...
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O...##O..#....OO.OO....O...O...O#..##.OOO..O..#OO....###....OO.O.O...........O...O..O.....#.#..O.O#.
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............#.#.##O.O.#.#OO#........O..O.O..##....O.#..#O..O...O#.#.#.........O...........OO......O.
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#.OO........#..#O.#......#....#....#......OO..OO...O#...#...#..##..O#.O......#.#..O..#O#...#..#.O#.O
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O.O.##...........O...O..O...O.OO.......##....#...O.....##...#.....OO...O.O#...OO..........O...O..#O.
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.O##....#.O#O....O.O.#.#O.O#..OO..##..#OO.#...#......#.#O#.....O...O#.O...#..O.#.#......#.##.O....O.
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.........#..#.O..O..O.O...#.#.O...#.OOO.##..#.O.....OO#....O...OOO#.O#....##O..#.O.O.....O.O.O.O..O.
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......#O.....OOO###.O..O####O.#.O...............#..O......##O...#.#..###...O....#O...OO.OO.O......O.
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#.O....#.O..#O...#...#...O....OOO.#O.#.#..#.....#.#..OO..#OO.......#OO.OOO....O.#O.#.O......####..O.
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OOOO...#.OO.#....O...O.O...##....#OO...O.##.O.....###..O........OO..O.O.......#.#...O..#..O.#..O....
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OOO..##....O...O.....O#..O.O.#..O..#.#.#..O........O..#OOO.....#....O#OO.#.#.....O..#..O...O..O.#OO#
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...##.#.##.#O....O#..O..O.........#.#.#O...O.......O...O#..OOOO....O...O.OO#.O.##...#....O..O.......
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....##.###OOO.O...#.......OO....OOO....O.OO#..O.#..OO....OO......O..OO...OOO.OO#...#..OOO..O.###O...
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O###O.....O.O.#O#.O.O#O.O###.....O..O........#....#..O#..#.#..O...........#......#OO........O..O####
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.#.#.OOO.O.......#O..O.#..O.OO.OO.O..O.#.#...O.O.OO..##..O...#...#O#..O.........O.O..O.O#....O..#O..
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.#..#O.#O..#.O.O.O...#OO....#...O....O..O.O...#..#.##O.O..O..#O.....OO##...O#.......O#O.#..........#
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#O...#.#OO.O...#O...O...#.#.O#..#.O#.###.#......O..O....#..#.OO..#....O..O.O....#.O.O.O.#..O..OOO..O
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O.....#...#.#OOO.OOOO..#O.O.#...O.##..OO..#O...#.....OO#..#.#...O##OO...O.....O..#...#...........O.O
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.##.O#.O..#O#.O##.O.#.........##.O......#OO...OO.......#...#O.O#...O..#.#...O..#...#O...O.#....OO.OO
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.O#OO.O..#...#..O..O...##.O....###O.....O...#.#OOO...OO...O.......#.#.#.OO....#OO.#..O..........OO..
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.....#OO.O..O.O.O...O.O#.#.O...O..#...O##.......#......#O...#.#.#....#..O.O..#..........O..#.#..#O..
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...O.O.O.OO...O#..O..OO..O#.#.O.#OO..O.O..OO..O#...#.O#...O.......#..#..O..##..O..#O......O.OO...O.O
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#.O....O.O.#...O.....O.....O#......#.#..OO...#.....O.#.#.O...#.#....#....O#.O.#......#OOO.O...O#....
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...OOO......#..O..O#.......#....O#OO..#O.#.#...#...O.O..OO..#.O...O..#.....OO..O..#...#.O...O#..O.OO
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#OO.OO#.OOO...##............O....O.O..#.##.#.O.........##...#O.O..#................#..O.O.O#O.O#..##
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.O.O.O##..#O.O#O...##.#OO#...#.OO#..O...O#...O....O#..OO....O....#...O...#OO.OO#O....#..O..#OO....O.
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.OO.#.......#...O...OO..#..OO.O.O.OO#O.O.O...O....O#..#.O.........O..#.O...#.#...O.O......O........O
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.O....##..#....#.....O.#...O.O.#....#....OOOO...O.O###.O........O.....O.O..#.##OOO.O.......#.#.O..O.
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.#.....O...#.O...#........#...#....#OO.O...O#O........OOO...#.O....OOO#.O.....OO....#.#...#..OO..#..
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||||||
OO.OO...O..#..#O....O.O....OOOOO.#O.#O.O...#.O....O#.O.O.#O.#...#..O...O.#O.O.#..O....OOO......#.O#.
|
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||||||
.O##..OO.....#.OO..#..O..#...#.#........O..OO...#O..O....#..O..O#.....O#..##O..O#.##.#...#.O..O.O.O.
|
|
||||||
..#...#O.....OO#.....O..#.#O.#.#..#..O.....#...OO.#.....O..O.O##.O.....OOOO.#O.....O.#..O........#.#
|
|
||||||
.#.#O..O.O..#..O##.....O.OO...##.........O...####..O..O....#O..O.....##........O.#..#.#OO.#..O.##.O#
|
|
||||||
#...#.O....OO......#O...#O..O#..#O#O.#..#.....OO....OO#..#O....O.O..#.O.#.....O#.O.OO..O#.O.O..O.O#.
|
|
||||||
OO....OO......#O........#O...#.#..O##....O#..#.#O.O.#....O..O..O.O....O.......#..OOO#.........O....O
|
|
||||||
O.....#O.OO##......#O##..O..O...##..O..........O..OO.O..#O....O..OOO#OO.##..#....O#..#...O.O.O...O..
|
|
||||||
.............#.#.#.O...#.#..#......O.#.O..#....#..##....#.##.##.#.O...O.O..#.#.#...OO....O..#O..#..O
|
|
||||||
.O.#.....O.O..O..##O...OO.#.O....#..#.#...O.O#...#O.O.OO...O..#..OO...O...O...O.....#.O..O#..#.#..OO
|
|
||||||
.....O..OO......#.#.#.O.##.OO...O..O.#..#...#OO....OOO......O.OO.#.O..O#O...O.#......OO##O.O.#O..O..
|
|
||||||
O##O.#.#..#..OO.O.........#O.#..O.#.##.O#..OOOO..#....O...O.........O..O..###...O...O.#.....O..##.O.
|
|
||||||
..O...#O#O.O...O.#..#O.......OO...........#...#..##.O......#..O.O.#OO.OO.#O....#.O.....O..#..#.#..#.
|
|
||||||
O#..O..##O#....O..OOO..OO...#O..O.O...O#O...OO.O##.O#O..#......OO##O.##...OOO.O..#....O##O..#......#
|
|
||||||
..#O...O..O.O...#..O.O...#O.....O.O......##OO#..O......#..O.#.O......OO.#O........O.....OO...O...O.O
|
|
||||||
........OO.#.OO..O......#...#...#..OOOO.OO.#....O.OO...O.##.....O.O....#O.#.OO..##.##..#.#O#.OO...O#
|
|
||||||
....#......#O.OO.....OOO....OO..O.O.O....##..O..O.O#.O....O.#O.#O.....O..O........#O.....O.O.....O#.
|
|
||||||
#.O#.O#......##.....O.#O...###...##....#O#.#.#....OO...O..#.O....O..#..#..O..........O......#.O.O...
|
|
||||||
.O.#..O#.OO....O.#...#O....#....OO......#O.O..#O..........O.#..#...#OOO........#.#.........O.#..O...
|
|
||||||
#OO.OO..O..O.O.#O.O.....O.##..#.O#..#.O....#........#.OOO#.#.....#.#.......O#..##..#.OO....O#O#.....
|
|
||||||
.......#O.O....#.OOO..OO...O...#....O..#.#....OO..O....O.#.O.#O#..O#.#.O..O......##...OO..#....O.#..
|
|
||||||
.O..O#.#OO.O.O.O.##...O..O.O..O.##O...#.O..O..O..O..O.....O...#..OO#O..O###...#...#....O##.OO...#...
|
|
||||||
#O....#...##..O..#...#OO.O.O.#......O...O.#.#O..O...O....OOO..O.O..O...O.OO...O...#..O....O#.###....
|
|
||||||
....#..O.....##.O.......##.##..OOO.O.#.#.....#....O..#..O....#....O...#.O..O#..O##...#.##....O.#OO##
|
|
||||||
O....O...OO.O........#..O...#..#.....O......O.O.OO.OO..#....O..O.............##.O.....##O#.OOO......
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|
||||||
........#.O.####O.OO.#.O..O.O.#.#....OO#.......O..#....##.OOO..O.O.O..#.O.#...O.O.O..O.##O..O#....O.
|
|
||||||
...#....#.....O....O.O.O##.O..#O.OO...#.##.O..###OO##.O......#..##.OO...O.......O.......#..O.#.O..O.
|
|
||||||
.O.O...O......OO.#....#O..O.O.O..OO.O..O##O...O....O..OO.#..O....O..#.O..OO.OO....O#O..#.O..#O...#.#
|
|
||||||
..O#O.#O..#...##..#.O...OO..O#.......#..O........#.OO#..O#.#.#O....##...O.........O......OO#.....O.#
|
|
||||||
....OO.......###..O#.....O##..#O..#..#.O.....##.......##..O#O....#....#O.O..#..#..O.###O..#.O#......
|
|
||||||
O..##..O...#..O...O#OOO....#.O##O.#........#.O..O.#..#.OO.#O.#.....##.O..O.O....#..#..OO....#..#..##
|
|
||||||
.#...O.OO#O.O..O.##O..O#...##...O....OO.O#....#...#O.O#....O..........#....#............##.......#..
|
|
||||||
.O.#........##O...#O..O..O....OO#O....#.O..OO.##..O..OO#.###OO.....#..#.......O.#.....OO........OO.#
|
|
||||||
.OO...O.#..##.....OO..O.O.O.#.###.##.O.#..O..#..O..O...##.#......O....O.O.........O..#.O.O#O.#O...#.
|
|
||||||
#..#.#..O...##.....OO#O.OOO.....#...#.....##.#...O....O....#..OO#.#.OO....#.....O.O...O#.#..#..O#O.O
|
|
||||||
.O#.O.#..O..O#...OO...O...O#...O..O..#.O..#...O#.#....O......O#...O...OO.O##.#O....O....#OO....#O...
|
|
||||||
OO..OOO.O......OO...OO#O...#.#.#O.OOO#....#.OO#.#.O.#......O.O.OO#..O..#..O.O#.O#.O....O..O...O.....
|
|
||||||
...OO....O...#OO#..#..O.#O#....O.....OO.O.#.OO##.....#..O#.OO..#.#.O#..#..O.#..O....#....O.#O...OO#O
|
|
||||||
..#.......OO..##.O#...O#....O.#.O..##..#O.......#O#......O..O.........O#..#OO..O..#O.#.#.O.O#.#OO#.O
|
|
||||||
...#O#...O...OO...OO..OO...#OO...O...##.O....##.#O##.O....#..O#..O.....O.......###.#.OO#...O......#.
|
|
||||||
.O.OO#O##O##...#..#....#..#O...O#..O.O##......#........#O.........#.O....O..#..O.....O..#......O.#.#
|
|
||||||
..#....#.O.O.O..O.....O.O#O.O..#......O............O.........O#.O....#.O#..O..O.#OO.....#......O...#
|
|
||||||
OO...#..O..O##.#.#O.O.#.#....O....O...O.#..O##...O...#.O...#.O.OO...#........O#O..O.O.O..O.....#.O..
|
|
||||||
.OOO....#...O..O.....O..O...O...O..O...O#...#O....O.O...#..OO##.O.#..O..........O#..#..#..OO#.....#.
|
|
||||||
O..#..O#....#O..##O..#.#.......OO..O..#...O....O.#....O..O.##........O...O..OO...#....OO#..O.#.#.#..
|
|
||||||
O#O.O.O#.#OO#..OO.O.#......#.....#.......##.O..#.O..#..OO..O.#.#.O.O.O#.#......O....####OO#.#O#OO.#.
|
|
||||||
.#.....O#..O#O#..OO...#.O.#....#.#..##....O##....#.........##OO...##...O......#.OO...#O....O.O.O#O..
|
|
||||||
O......#.O....O...O.....OO.#....#O.##....#.O.O...O..#...O....#.O....O.O....#.OO.#.......#...#..#...O
|
|
||||||
...#OO..#......#..OO.O.O.##.O....O.##O##.OO#O.O.O..O.#O#O.OO...........O...###.#......O..#..#O#..OOO
|
|
||||||
O..O.#..O.OO.O...OO.OO..OOOO....O...#....##.OO.O.....#.......O.O........O.#.......#.......#..#.O..O.
|
|
||||||
.OO.##...#O..O#....O....#..O#....#.....O...O#.....OOO#.....................#..#..#..#O.......O.#OO..
|
|
||||||
.#OO..O....O..#.....#O...OO.#....#.#.O...O.#........O...O..O..OO#..#.....#.......OOOOO.OO....O....O.
|
|
||||||
.O#...#.......O.O...O.O.O#...OO.O#...O#O.O.#......#......O..O##.##.....O.....##...........O#...O....
|
|
||||||
.#.O.O#.....O.#..OO......#O.#..O..O.O.O..#.#...O##.#O..OOO......#...#..OO...O.#.....#O.OOO...#.O..##
|
|
||||||
.........O..##OO.#OOOO.O.O..OOO...OO.#.....#...O.#O##..O#..#.#..#...#..O.O...#OO.O...O...#O...#..#..
|
|
||||||
.#.#O.#...#OO.O.........O#..O...OO#.....O....OOOO#.....O.O....#...O...........O#.#.O..O.#.O.#.O.#.#.
|
|
||||||
......O.#...O.....O.O..O#...O.#........#.O...O.O....#..O#....O.#.O.O....O...#OO...#........OO..O.O.O
|
|
||||||
....O.O..OO.....#...OOOO.O#............O#OO....OOOOOO..#..#O#..#.#.O.OO.#O.....O.#......##..O#..#O..
|
|
||||||
..#......#...#O.#..#.#....OOO#...O.#....O..#O.....O.....O.O......O.......O.O..O..O.OO.O.#OO..O#...#.
|
|
||||||
.O.#.O.OO..O#.O#OO..........O.......O..#..#.#..O...#...##.....####...#........##O.......#....#...O##
|
|
||||||
........#.#.O.#O.......#O...O...#.#O..#OOO..#O..###...O.#.#O...O.O#..O..O...O.O....###.OO.#OO..O.#.O
|
|
||||||
..#O....#..O..####.O#...O....O.#O.##.O....O.O......O#O...OO###...O..#........#.#O.O#OO.......#.....O
|
|
||||||
....O.....#.#.O.#..O.#O.#.#O.#.......OO.....OOO...O.O..#.#....#..O.O..#.OO.O..O..OO##.....#.O..OO#O.
|
|
||||||
O#O..OO.O....OO.#O......O......#...#.....O.#OO.#.....OO..O#.O..O.O...#....O.O..OO.O....#....OO..O...
|
|
||||||
...O.....##....#....#....#......O#O..OO.....OO#O.OO......#OO.......O.#..###OO...#.O..OO.#.O.O#OO..#.
|
|
||||||
.O.#.O..#O.....#.#O....##OO.#O..##..##.##...#OO.O.#O#..O..O.O..O..##O.O.....O.OOO..#..#O..O#..OO...O
|
|
||||||
..##O#O.O.#.........O....O.OO#O#O.....O.....O#O.OO.O......O.O.OO......#.....O.O.O.O.O.....#.O.......
|
|
||||||
.....#OO.#O........O#....O.#OO.OO........#.O....O.OOOOOO.#.#O......O.#...O#.O.O..OO.....O.OO...#.O.#
|
|
||||||
.....#................OO..OOOO..#.....O.###O.O...O..#O..........OO.#...OO.O#...O......O..OOOO.#..###
|
|
||||||
O.....O...#O.#..........#O......O..OOO#....O.OOOO....O..#..#O....O.....O#..O..#.O.O....#OO.#....#O..
|
|
||||||
|
|
@ -1,148 +0,0 @@
|
||||||
package day15
|
|
||||||
|
|
||||||
import (
|
|
||||||
"fmt"
|
|
||||||
"log"
|
|
||||||
"os"
|
|
||||||
"regexp"
|
|
||||||
"slices"
|
|
||||||
"strconv"
|
|
||||||
"strings"
|
|
||||||
)
|
|
||||||
|
|
||||||
func Run() int {
|
|
||||||
fmt.Println("hello day 15")
|
|
||||||
log.Println("hello day 15")
|
|
||||||
filename := "day15/input"
|
|
||||||
bytes, err := os.ReadFile(filename)
|
|
||||||
if err != nil {
|
|
||||||
panic(fmt.Sprint("error reading file ", filename))
|
|
||||||
}
|
|
||||||
text := string(bytes)
|
|
||||||
text = strings.TrimSpace(text)
|
|
||||||
instructions := strings.Split(text, ",")
|
|
||||||
|
|
||||||
result := 0
|
|
||||||
|
|
||||||
boxes := make([]Box, 256)
|
|
||||||
for i, box := range boxes {
|
|
||||||
box.Focals = make(map[string]int)
|
|
||||||
boxes[i] = box
|
|
||||||
}
|
|
||||||
|
|
||||||
for _, instructionStr := range instructions {
|
|
||||||
i := ReadInstruction(instructionStr)
|
|
||||||
box := boxes[i.Box]
|
|
||||||
box.Act(i)
|
|
||||||
boxes[i.Box] = box
|
|
||||||
|
|
||||||
// result += ASCIIStringHash(instruction)
|
|
||||||
}
|
|
||||||
|
|
||||||
for i, box := range boxes {
|
|
||||||
if len(box.Labels) != 0 {
|
|
||||||
log.Printf("%d box %+v final state\n", i, box)
|
|
||||||
}
|
|
||||||
result += (i + 1) * box.FocusingPower()
|
|
||||||
}
|
|
||||||
|
|
||||||
return result
|
|
||||||
}
|
|
||||||
|
|
||||||
type Box struct {
|
|
||||||
Labels []string
|
|
||||||
Focals map[string]int
|
|
||||||
}
|
|
||||||
|
|
||||||
func (b *Box)Act(i Instruction) {
|
|
||||||
log.Printf("for box %+v instruction \n%s\n", b, i.String())
|
|
||||||
switch i.Action {
|
|
||||||
case Put:
|
|
||||||
_, found := b.Focals[i.Label]
|
|
||||||
if !found {
|
|
||||||
b.Labels = append(b.Labels, i.Label)
|
|
||||||
}
|
|
||||||
b.Focals[i.Label] = i.LensFocal
|
|
||||||
|
|
||||||
case Remove:
|
|
||||||
_, found := b.Focals[i.Label]
|
|
||||||
if !found {
|
|
||||||
return
|
|
||||||
}
|
|
||||||
index := slices.Index(b.Labels, i.Label)
|
|
||||||
delete(b.Focals, i.Label)
|
|
||||||
b.Labels = slices.Delete(b.Labels, index, index+1)
|
|
||||||
}
|
|
||||||
log.Printf("result : %+v\n", b)
|
|
||||||
return
|
|
||||||
}
|
|
||||||
|
|
||||||
func (b *Box)FocusingPower() int {
|
|
||||||
result := 0
|
|
||||||
for i, label := range b.Labels {
|
|
||||||
result += (i + 1) * b.Focals[label]
|
|
||||||
}
|
|
||||||
return result
|
|
||||||
}
|
|
||||||
|
|
||||||
type Action rune
|
|
||||||
|
|
||||||
const (
|
|
||||||
Put Action = '='
|
|
||||||
Remove = '-'
|
|
||||||
)
|
|
||||||
|
|
||||||
type Instruction struct {
|
|
||||||
Label string
|
|
||||||
Box int
|
|
||||||
Action Action
|
|
||||||
LensFocal int
|
|
||||||
}
|
|
||||||
|
|
||||||
func (i *Instruction) String() string {
|
|
||||||
operation := ""
|
|
||||||
switch i.Action {
|
|
||||||
case Put:
|
|
||||||
operation = "put into"
|
|
||||||
case Remove:
|
|
||||||
operation = "remove from"
|
|
||||||
}
|
|
||||||
return fmt.Sprintf("%s\t\t%d of focal %d %s", operation, i.Box, i.LensFocal, i.Label)
|
|
||||||
}
|
|
||||||
|
|
||||||
func ReadInstruction(str string) Instruction {
|
|
||||||
result := Instruction{}
|
|
||||||
|
|
||||||
re := regexp.MustCompile(`(?P<label>\D+)(?P<operation>[=\-])(?P<focal>\d*)`)
|
|
||||||
// log.Println("in str ", str)
|
|
||||||
fields := re.FindStringSubmatch(str)
|
|
||||||
// log.Printf("in %s found %+v", str, fields)
|
|
||||||
|
|
||||||
operation := fields[2]
|
|
||||||
operationRune := []rune(operation)[0]
|
|
||||||
result.Action = Action(operationRune)
|
|
||||||
|
|
||||||
if operationRune == '=' {
|
|
||||||
focalStr := fields[3]
|
|
||||||
focal, err := strconv.Atoi(focalStr)
|
|
||||||
if err != nil {
|
|
||||||
panic(fmt.Sprint("error reading focal from ", str))
|
|
||||||
}
|
|
||||||
result.LensFocal = focal
|
|
||||||
}
|
|
||||||
|
|
||||||
result.Label = fields[1]
|
|
||||||
result.Box = ASCIIStringHash(result.Label)
|
|
||||||
|
|
||||||
return result
|
|
||||||
}
|
|
||||||
|
|
||||||
func ASCIIStringHash(str string) int {
|
|
||||||
result := 0
|
|
||||||
for _, symb := range str {
|
|
||||||
result += int(symb)
|
|
||||||
result *= 17
|
|
||||||
result %= 256
|
|
||||||
}
|
|
||||||
return result
|
|
||||||
}
|
|
||||||
|
|
@ -1 +0,0 @@
|
||||||
rn=1,cm-,qp=3,cm=2,qp-,pc=4,ot=9,ab=5,pc-,pc=6,ot=7
|
|
||||||
File diff suppressed because one or more lines are too long
6
main.go
6
main.go
|
|
@ -3,12 +3,12 @@ package main
|
||||||
import (
|
import (
|
||||||
"log"
|
"log"
|
||||||
|
|
||||||
"sunshine.industries/aoc2023/day15"
|
"sunshine.industries/aoc2023/day13"
|
||||||
)
|
)
|
||||||
|
|
||||||
func main() {
|
func main() {
|
||||||
log.Print("> starting run:")
|
log.Print("> starting run:")
|
||||||
|
|
||||||
result := day15.Run()
|
result := day13.Run()
|
||||||
log.Printf("day15 result: %d\n****\n", result)
|
log.Printf("day13 result: %d\n****\n", result)
|
||||||
}
|
}
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue