2023 Day 11 Complete!

Added a todo file to track changes to my helpers that need
to be propagated through previous days/years

2023/day11/input

@@ -0,0 +1,140 @@
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+................#.......................#.........................#...................................................#.....................
+...#.......................#...............................#.........................................#.........................#............
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2023/day11/main.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+	"fmt"
+
+	h "git.bullercodeworks.com/brian/adventofcode/helpers"
+)
+
+func main() {
+	inp := h.StdinToStringSlice()
+	part1(inp)
+	fmt.Println()
+	part2(inp)
+}
+
+func part1(input []string) {
+	m := h.StringSliceToCoordByteMap(input)
+	for y := m.Height() - 1; y >= 0; y-- {
+		if !m.RowContains(y, '#') {
+			m.InsertRowAfter(y, '.')
+		}
+	}
+	for x := m.Width() - 1; x >= 0; x-- {
+		if !m.ColContains(x, '#') {
+			m.InsertColAfter(x, '.')
+		}
+	}
+	galaxies := m.FindAll('#')
+	var result int
+	for i := 0; i < len(galaxies); i++ {
+		for j := i + 1; j < len(galaxies); j++ {
+			result += galaxies[i].Distance(galaxies[j])
+		}
+	}
+	fmt.Println("# Part 1")
+	fmt.Println(result)
+}
+
+func part2(input []string) {
+	m := h.StringSliceToCoordByteMap(input)
+	expansion := 1000000
+
+	galaxies := m.FindAll('#')
+	for y := m.Height() - 1; y >= 0; y-- {
+		if !m.RowContains(y, '#') {
+			// For every '#' coordinate on a row _after_ y, add 1000000 to it's y coord
+			for i := 0; i < len(galaxies); i++ {
+				if galaxies[i].Y > y {
+					galaxies[i].Y += (expansion - 1)
+				}
+			}
+		}
+	}
+	for x := m.Width() - 1; x >= 0; x-- {
+		if !m.ColContains(x, '#') {
+			// For every '#' coordinate on a col _after_ x, add 1000000 to it's x coord
+			for i := 0; i < len(galaxies); i++ {
+				if galaxies[i].X > x {
+					galaxies[i].X += (expansion - 1)
+				}
+			}
+		}
+	}
+	var result int
+	for i := 0; i < len(galaxies); i++ {
+		for j := i + 1; j < len(galaxies); j++ {
+			result += galaxies[i].Distance(galaxies[j])
+		}
+	}
+	fmt.Println("# Part 2")
+	fmt.Println(result)
+}

2023/day11/testinput

@@ -0,0 +1,10 @@
+...#......
+.......#..
+#.........
+..........
+......#...
+.#........
+.........#
+..........
+.......#..
+#...#.....

helpers/coordinateByteMap.go

@@ -7,9 +7,7 @@ import (
 )
 
 type CoordByteMap struct {
-	Field  map[Coordinate]byte
+	Field map[Coordinate]byte
-	Height int
-	Width  int
 
 	// The Top-Left-most X/Y
 	TLX, TLY int
@@ -34,8 +32,7 @@ func NewCoordByteMap() CoordByteMap {
 
 func StringSliceToCoordByteMap(input []string) CoordByteMap {
 	ret := CoordByteMap{
-		Field:  make(map[Coordinate]byte),
+		Field: make(map[Coordinate]byte),
-		Height: len(input),
 	}
 	for y := range input {
 		for x := range input[y] {
@@ -45,6 +42,13 @@ func StringSliceToCoordByteMap(input []string) CoordByteMap {
 	return ret
 }
 
+func (m *CoordByteMap) Height() int {
+	return m.BRY - m.TLY
+}
+func (m *CoordByteMap) Width() int {
+	return m.BRX - m.TLX
+}
+
 func (m *CoordByteMap) ToByteSlices() [][]byte {
 	var ret [][]byte
 	for y := m.TLY; y <= m.BRY; y++ {
@@ -63,6 +67,54 @@ func (m *CoordByteMap) ContainsCoord(c Coordinate) bool {
 		c.Y >= m.TLY && c.Y <= m.BRY
 }
 
+// RowContains searches a row for a byte
+func (m *CoordByteMap) RowContains(row int, b byte) bool {
+	for x := m.TLX; x <= m.BRX; x++ {
+		if m.Get(Coordinate{X: x, Y: row}) == b {
+			return true
+		}
+	}
+	return false
+}
+
+// ColContains searches a column for a byte
+func (m *CoordByteMap) ColContains(col int, b byte) bool {
+	for y := m.TLY; y <= m.BRY; y++ {
+		if m.Get(Coordinate{X: col, Y: y}) == b {
+			return true
+		}
+	}
+	return false
+}
+
+// InsertRowAfter grows the map south, moves all rows after 'row' south
+// Then fills the 'row'th row with 'fill'
+func (m *CoordByteMap) InsertRowAfter(row int, fill byte) {
+	m.GrowSouth(1, fill)
+	for y := m.BRY; y > row; y-- {
+		for x := m.TLX; x <= m.BRX; x++ {
+			m.Put(Coordinate{X: x, Y: y}, m.Get(Coordinate{X: x, Y: y - 1}))
+		}
+	}
+	for x := m.TLX; x <= m.BRX; x++ {
+		m.Put(Coordinate{X: x, Y: row}, fill)
+	}
+}
+
+// InsertColAfter grows the map East, moves all cols after 'col' east
+// Then fills the 'col'th column with 'fill'
+func (m *CoordByteMap) InsertColAfter(col int, fill byte) {
+	m.GrowEast(1, fill)
+	for x := m.BRX; x > col; x-- {
+		for y := m.TLY; y <= m.BRY; y++ {
+			m.Put(Coordinate{X: x, Y: y}, m.Get(Coordinate{X: x - 1, Y: y}))
+		}
+	}
+	for y := m.TLY; y <= m.BRY; y++ {
+		m.Put(Coordinate{X: col, Y: y}, fill)
+	}
+}
+
 // FindFirst searches left to right, top to bottom for the first
 // instance of b.
 func (m *CoordByteMap) FindFirst(b byte) (Coordinate, error) {
@@ -199,12 +251,6 @@ func (m *CoordByteMap) Put(pos Coordinate, val byte) {
 		m.BRY = pos.Y
 	}
 	m.Field[pos] = val
-	if pos.X+1 > m.Width {
-		m.Width = m.BRX - m.TLX + 1
-	}
-	if pos.Y+1 > m.Height {
-		m.Height = m.BRY - m.TLY + 1
-	}
 }
 func (m *CoordByteMap) Delete(pos Coordinate) {
 	delete(m.Field, pos)

helpers/helpers.go

@@ -23,6 +23,7 @@ const (
 
 	FILL_CHAR    = "\u2588"
 	CLEAR_SCREEN = "\033[H\033[2J"
+	CLEAR_LINE   = "\033[1K"
 
 	MAX_INT = int(^uint(0) >> 1)
 	MIN_INT = -MAX_INT - 1

todo.md

@@ -0,0 +1,4 @@
+# TODO
+
+## CoordByteMap Changes
+* [ ] Height/Width are functions now