advent-of-code/2021
advent-of-code/2021
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day(04): clean up and remove todo

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Signed-off-by: Matej Focko <mfocko@redhat.com>
This commit is contained in:
Matej Focko 2021-12-05 11:23:15 +01:00
parent 2d4eb2b19e
commit f7ea52c685
1 changed files with 10 additions and 12 deletions
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22
src/day04/Day04.kt
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@ -20,22 +20,19 @@ class Bingo(description: List<String>) {
.toMutableList() .toMutableList()
} }
// TODO: Clean up
private fun mark(board: MutableList<MutableList<Int>>, number: Int) { private fun mark(board: MutableList<MutableList<Int>>, number: Int) {
for (i in board.indices) { board.indices
for (j in board[i].indices) { .flatMap { i -> board.indices.map { j -> Pair(i, j) } }
if (board[i][j] == number) { .filter { (i, j) -> board[i][j] == number }
val before = isWinningBoard(board) .forEach { (i, j) ->
board[i][j] = -1 val before = isWinningBoard(board)
val after = isWinningBoard(board) board[i][j] = -1
val after = isWinningBoard(board)
if (before != after) { if (before != after) {
orderOfWin.add(board) orderOfWin.add(board)
}
} }
} }
}
} }
private fun isWinningBoard(board: MutableList<MutableList<Int>>): Boolean = board.indices.any { i -> private fun isWinningBoard(board: MutableList<MutableList<Int>>): Boolean = board.indices.any { i ->
@ -59,6 +56,7 @@ class Bingo(description: List<String>) {
check(nextDraw > 0) check(nextDraw > 0)
return draws[nextDraw - 1] return draws[nextDraw - 1]
} }
fun sumOfLast(): Int = orderOfWin.last().sumOf { row -> row.filter { it != -1 }.sum() } fun sumOfLast(): Int = orderOfWin.last().sumOf { row -> row.filter { it != -1 }.sum() }
} }