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Day 20 finally

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Hubert Van De Walle 2020-12-29 22:34:13 +01:00
parent c11231307f
commit 7a871771bb
1 changed files with 88 additions and 116 deletions
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204
days/src/main/kotlin/Day20.kt
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@ -7,6 +7,8 @@ import be.vandewalleh.aoc.utils.input.Day
import be.vandewalleh.aoc.utils.input.Groups
import be.vandewalleh.aoc.utils.input.Input
import be.vandewalleh.aoc.utils.input.createDay
import java.util.*
import kotlin.collections.ArrayList
import kotlin.math.sqrt
private typealias Tile = Grid<Char>
@ -121,126 +123,96 @@ class Day20(@Groups val input: Input<List<List<String>>>) {
return grid
}
private fun removeGaps(grid: Grid<Tile?>) {
for (y in 0 until grid.height) {
for (x in 0 until grid.width) {
grid[x, y] = removeGaps(grid[x, y]!!)
}
}
}
private fun removeGaps(tile: Tile): Tile {
val oldData: ArrayList<ArrayList<Char>> = tile.data
val newData = ArrayList<ArrayList<Char>>(oldData.size - 2)
oldData.subList(1, oldData.size - 1).forEach { d ->
val l = ArrayList<Char>().apply {
addAll(d.subList(1, d.size - 1))
}
newData.add(l)
}
return Tile(newData)
}
private fun gridToTile(grid: Grid<Tile?>): Tile {
val newData = ArrayList<ArrayList<Char>>()
for (y in 0 until grid.height) {
val row = grid.row(y)
for (yy in 0 until row[0]!!.height) {
val combinedRow = ArrayList<Char>()
row.forEach { combinedRow.addAll(it!!.row(yy)) }
newData.add(combinedRow)
}
}
return Tile(newData)
}
private fun Tile.subGridData(startX: Int, startY: Int, width: Int, height: Int): List<List<Char>> {
val newData = ArrayList<ArrayList<Char>>()
for (y in startY until startY + height) {
val row = ArrayList<Char>()
newData.add(row)
for (x in startX until startX + width) {
row.add(this[x, y]!!)
}
}
return newData
}
private fun List<List<Char>>.isMonster(monster: List<List<Char>>): Boolean {
val monsterRe = monster.joinToString("") { it.joinToString("") }.replace(" ", ".").toRegex()
val str = this.joinToString("") { it.joinToString("") }
return monsterRe.matches(str)
}
fun part2() {
val grid = assembleGrid()
TODO()
removeGaps(grid)
val megaTile = gridToTile(grid)
val monster: List<List<Char>> = """
| # |
|# ## ## ###|
| # # # # # # |
""".trimMargin("|").lines().map { it.toCharArray().toList().dropLast(1) }
println(monster)
val monsterWidth = monster[0].size
val monsterHeight = 3
val monsterSquares = monster.joinToString("") { it.joinToString("") }.count { it == '#' }
val squares = megaTile.data.joinToString("") { it.joinToString("") }.count { it == '#' }
for (g: Tile in megaTile.transformations()) {
var count = 0
for (y in 0 until g.lastRowIndex - monsterHeight) {
for (x in 0 until g.lastColumnIndex - monsterWidth) {
val subgrid = g.subGridData(x, y, monsterWidth, monsterHeight)
if (subgrid.isMonster(monster)) {
count++
}
}
}
if (count != 0) {
println(count)
println(squares - (count * monsterSquares))
}
}
}
}
fun main() {
with(createDay<Day20>(
"""
Tile 2311:
..##.#..#.
##..#.....
#...##..#.
####.#...#
##.##.###.
##...#.###
.#.#.#..##
..#....#..
###...#.#.
..###..###
Tile 1951:
#.##...##.
#.####...#
.....#..##
#...######
.##.#....#
.###.#####
###.##.##.
.###....#.
..#.#..#.#
#...##.#..
Tile 1171:
####...##.
#..##.#..#
##.#..#.#.
.###.####.
..###.####
.##....##.
.#...####.
#.##.####.
####..#...
.....##...
Tile 1427:
###.##.#..
.#..#.##..
.#.##.#..#
#.#.#.##.#
....#...##
...##..##.
...#.#####
.#.####.#.
..#..###.#
..##.#..#.
Tile 1489:
##.#.#....
..##...#..
.##..##...
..#...#...
#####...#.
#..#.#.#.#
...#.#.#..
##.#...##.
..##.##.##
###.##.#..
Tile 2473:
#....####.
#..#.##...
#.##..#...
######.#.#
.#...#.#.#
.#########
.###.#..#.
########.#
##...##.#.
..###.#.#.
Tile 2971:
..#.#....#
#...###...
#.#.###...
##.##..#..
.#####..##
.#..####.#
#..#.#..#.
..####.###
..#.#.###.
...#.#.#.#
Tile 2729:
...#.#.#.#
####.#....
..#.#.....
....#..#.#
.##..##.#.
.#.####...
####.#.#..
##.####...
##..#.##..
#.##...##.
Tile 3079:
#.#.#####.
.#..######
..#.......
######....
####.#..#.
.#...#.##.
#.#####.##
..#.###...
..#.......
..#.###...
""".trimIndent()
)) {
println(part1())
println(part2())
}
fun main() = with(createDay<Day20>()) {
println(part1())
println(part2())
}