結果
| 問題 |
No.1854 Limited Bubble Sort
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2022-03-14 00:17:47 |
| 言語 | Scala(Beta) (3.6.2) |
| 結果 |
AC
|
| 実行時間 | 1,104 ms / 2,000 ms |
| コード長 | 1,965 bytes |
| コンパイル時間 | 11,773 ms |
| コンパイル使用メモリ | 269,760 KB |
| 実行使用メモリ | 67,268 KB |
| 最終ジャッジ日時 | 2024-09-19 08:01:27 |
| 合計ジャッジ時間 | 40,206 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 25 |
ソースコード
import java.io.PrintWriter
import scala.collection.mutable.*
import scala.io.StdIn.*
import scala.util.chaining.*
import scala.math.*
import scala.reflect.ClassTag
import scala.util.*
import scala.annotation.tailrec
import scala.collection.mutable
def solve(permutation: Array[Int]): Option[ArrayBuffer[Int]] =
if permutation.forall(permutation.indices.contains(_)) then
permutation.indices.find(i => permutation(i) == i) match
case Some(i) =>
solve(permutation.slice(0, i)).flatMap(result => solve(permutation.slice(i + 1, permutation.length).map(_ - i - 1)).map(_.map(_ + i + 1) ++ result))
case None =>
Some(solveFlat(permutation))
else
None
def solveFlat(array: Array[Int]): ArrayBuffer[Int] =
if array.isEmpty then
return ArrayBuffer.empty
val indices = Array.fill(array.length){0}
val leftCount = Array.fill(array.length){0}
for (a, i) <- array.zipWithIndex do
indices(a) = i
leftCount(a) = (0 until i).count(j => array(j) < array(i))
val result = ArrayBuffer[Int]()
val current = array.clone()
def swap(i: Int) =
if current(i) < current(i + 1) then
leftCount(current(i + 1)) -= 1
else
leftCount(current(i)) += 1
val temp = current(i)
current(i) = current(i + 1)
current(i + 1) = temp
indices(current(i)) = i
indices(current(i + 1)) = i + 1
result.addOne(i + 1)
for i <- array.indices do
for j <- i until indices(i) do
if current(j) != j + 1 && current(j + 1) == j + 2 && leftCount(j + 2) + 1 != j + 2 then
swap(j)
for j <- indices(i) until i by -1 do
swap(j - 1)
result
@main def main =
val testCount = readLine().toInt
for testCase <- 1 to testCount do
val n = readLine().toInt
val permutation = readLine().split(' ').map(_.toInt - 1)
solve(permutation) match
case Some(result) =>
println(result.size)
println(result.mkString(" "))
case None =>
println(-1)