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day18, example for part 2

This commit is contained in:
efim 2023-12-18 19:46:38 +00:00
parent 6dabe8bc66
commit 568fdd9a70
2 changed files with 24 additions and 18 deletions
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36
day18/lagoon.go
View File

@ -13,17 +13,17 @@ func Run() int {
log.Println("hello day 18") log.Println("hello day 18")
log.Println("problem of lagoon bgins") log.Println("problem of lagoon bgins")
filename := "day18/example" filename := "day18/example"
instructions := ReadInstructionas(filename) instructions := ReadInstructionas2(filename)
h, w := calcHeightWidth(instructions) h, w := calcHeightWidth(instructions)
log.Printf("read %+v instructions", instructions) log.Printf("read %+v instructions", instructions)
field := CreateField(h, w) field := CreateField(h, w)
fmt.Println(field.String()) // fmt.Println(field.String())
borderAmount := field.digByInstructions(instructions) borderAmount := field.digByInstructions(instructions)
log.Println(">>> created field", field.BordersFromLeft) // log.Println(">>> created field", field.BordersFromLeft)
fmt.Println(field.String()) // fmt.Println(field.String())
// WriteToFile("borders.txt", field.String()) // WriteToFile("borders.txt", field.String())
// convert -size 3000x6000 xc:white -font "FreeMono" -pointsize 13 -fill black -draw @borders.txt borders.png // convert -size 3000x6000 xc:white -font "FreeMono" -pointsize 13 -fill black -draw @borders.txt borders.png
@ -31,7 +31,7 @@ func Run() int {
insideAmount := field.digInsides() insideAmount := field.digInsides()
log.Printf("border is %d; inside is %d", borderAmount, insideAmount) log.Printf("border is %d; inside is %d", borderAmount, insideAmount)
fmt.Println(field.String()) // fmt.Println(field.String())
// fmt.Println(field.Height, field.Width) // fmt.Println(field.Height, field.Width)
// WriteToFile("fulldug.txt", field.String()) // WriteToFile("fulldug.txt", field.String())
// convert -size 3000x6000 xc:white -font "FreeMono" -pointsize 13 -fill black -draw @fulldug.txt fulldug.png // convert -size 3000x6000 xc:white -font "FreeMono" -pointsize 13 -fill black -draw @fulldug.txt fulldug.png
@ -266,9 +266,9 @@ func (f *Field) digByInstructions(instructions []Instruction) (borderAmount int)
borderAmount -= instructions[0].Steps borderAmount -= instructions[0].Steps
runnerCoord := Coord{Col: 0, Row: 0} runnerCoord := Coord{Col: 0, Row: 0}
f.Cells[runnerCoord] = &Cell{ // f.Cells[runnerCoord] = &Cell{
IsDug: true, // IsDug: true,
} // }
// f.confirmCoord(runnerCoord) // should be confirmed when the cycle is closed on last step // f.confirmCoord(runnerCoord) // should be confirmed when the cycle is closed on last step
// borderAmount += 1 // borderAmount += 1
@ -279,20 +279,20 @@ func (f *Field) digByInstructions(instructions []Instruction) (borderAmount int)
if !firstInstruction { if !firstInstruction {
turn := getTurnAsIfGoingFromLeft(prevInstruction.Direction, instruction.Direction) turn := getTurnAsIfGoingFromLeft(prevInstruction.Direction, instruction.Direction)
for _, theTurn := range turn { for _, theTurn := range turn {
log.Printf(">> putting turn %s", string(turn)) // log.Printf(">> putting turn %s", string(turn))
PutSymbIntoMMMMap(f.BordersFromLeft, runnerCoord.Row, runnerCoord.Col, theTurn) PutSymbIntoMMMMap(f.BordersFromLeft, runnerCoord.Row, runnerCoord.Col, theTurn)
} }
} }
firstInstruction = false firstInstruction = false
log.Printf("starting instruction %+v", instruction) // log.Printf("starting instruction %+v", instruction)
for i := 0; i < instruction.Steps; i++ { for i := 0; i < instruction.Steps; i++ {
runnerCoord = runnerCoord.applyDirection(instruction.Direction) runnerCoord = runnerCoord.applyDirection(instruction.Direction)
f.Cells[runnerCoord] = &Cell{ // f.Cells[runnerCoord] = &Cell{
IsDug: true, // IsDug: true,
} // }
f.confirmCoord(runnerCoord) f.confirmCoord(runnerCoord)
borderAmount += 1 borderAmount += 1
log.Printf("inside %+v updated border amount to %d", instruction, borderAmount) // log.Printf("inside %+v updated border amount to %d", instruction, borderAmount)
if instruction.Direction == Upward || instruction.Direction == Downward { if instruction.Direction == Upward || instruction.Direction == Downward {
_, alreadyCountedTurn := f.BordersFromLeft[runnerCoord.Row][runnerCoord.Col] _, alreadyCountedTurn := f.BordersFromLeft[runnerCoord.Row][runnerCoord.Col]
@ -308,7 +308,7 @@ func (f *Field) digByInstructions(instructions []Instruction) (borderAmount int)
} }
func getTurnAsIfGoingFromLeft(directionFrom, directionTo Direction) []BorderSymbol { func getTurnAsIfGoingFromLeft(directionFrom, directionTo Direction) []BorderSymbol {
log.Printf("getTurnAsIfGoingFromLeft from %s to %s", directionFrom.String(), directionTo.String()) // log.Printf("getTurnAsIfGoingFromLeft from %s to %s", directionFrom.String(), directionTo.String())
var symbol BorderSymbol var symbol BorderSymbol
if directionTo == Rightward && directionFrom == Upward { if directionTo == Rightward && directionFrom == Upward {
@ -427,9 +427,9 @@ func (f *Field) digInsides() (countInside int) {
if bordersCrossed % 2 == 1 { // is in if bordersCrossed % 2 == 1 { // is in
for col := prevBorder.col+1; col < specialBorder.col; col++ { for col := prevBorder.col+1; col < specialBorder.col; col++ {
f.Cells[Coord{Col: col, Row: row}] = &Cell{ // f.Cells[Coord{Col: col, Row: row}] = &Cell{
ToBeDug: true, // ToBeDug: true,
} // }
} }
countInside += diff countInside += diff
} }

6
day18/notes.org
View File

@ -28,3 +28,9 @@ on last - calc with the next turn, what should be saved 'as if traversing from t
for L \ R - on last - calc what the turn was for L \ R - on last - calc what the turn was
** TODO !! between last and first movement the corner is unknown. ** TODO !! between last and first movement the corner is unknown.
so, copy the first instruction to the end? so, copy the first instruction to the end?
** moment of hope.
my calculation for example input for part 2
day18 result: 952408144115
952408144115
*** YES.