結果

問題 No.887 Collatz
ユーザー GoryudyumaGoryudyuma
提出日時 2019-10-04 23:31:49
言語 Scala(Beta)
(3.6.2)
結果
AC  
実行時間 959 ms / 2,000 ms
コード長 6,959 bytes
コンパイル時間 17,758 ms
コンパイル使用メモリ 282,380 KB
実行使用メモリ 63,396 KB
最終ジャッジ日時 2024-10-03 09:46:37
合計ジャッジ時間 49,441 ms
ジャッジサーバーID
(参考情報)
judge2 / judge4
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 28
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

//import java.util.Scanner
import java.io._
import java.nio.file.Files._
import java.nio.file.Path
import java.util.StringTokenizer
import scala.collection.immutable._
import scala.io.Codec
/**
* Scala implementation of a faster java.util.Scanner
* See: http://codeforces.com/blog/entry/7018
*/
class Scanner(reader: LineNumberReader) extends Iterable[String] with AutoCloseable {
def this(reader: BufferedReader) = this(new LineNumberReader(reader))
def this(reader: Reader) = this(new BufferedReader(reader))
def this(inputStream: InputStream)(implicit codec: Codec) = this(new InputStreamReader(inputStream, codec.charSet))
def this(path: Path)(implicit codec: Codec) = this(newBufferedReader(path, codec.charSet))
def this(file: File)(implicit codec: Codec) = this(file.toPath)(codec)
def this(str: String) = this(new StringReader(str))
override def iterator: Iterator[String] = for {
line <- Iterator.continually(reader.readLine()).takeWhile(_ != null)
tokenizer = new StringTokenizer(line)
tokens <- Iterator.continually(tokenizer).takeWhile(_.hasMoreTokens)
} yield tokens.nextToken()
private[this] var current = iterator
def hasNext: Boolean = current.hasNext
@inline def next(): String = current.next()
/**
* This is different from Java's scanner.nextLine
* The Java one is a misnomer since it actually travel to end of current line
* This one actually does fetch the next line
*/
def nextLine(): String = {
val line = reader.readLine()
current = iterator
line
}
def lineNumber: Int = reader.getLineNumber
def nextString(): String = next()
def nextBoolean(): Boolean = next().toBoolean
def nextByte(radix: Int = 10): Byte = java.lang.Byte.parseByte(next(), radix)
def nextShort(radix: Int = 10): Short = java.lang.Short.parseShort(next(), radix)
def nextInt(radix: Int = 10): Int = java.lang.Integer.parseInt(next(), radix)
def nextLong(radix: Int = 10): Long = java.lang.Long.parseLong(next(), radix)
def nextBigInt(radix: Int = 10): BigInt = BigInt(next(), radix)
def nextFloat(): Float = next().toFloat
def nextDouble(): Double = next().toDouble
def nextBigDecimal(): BigDecimal = BigDecimal(next())
override def close(): Unit = reader.close()
}
class IUnionFind(val size: Int) {
private case class Node(var parent: Option[Int], var treeSize: Int)
private val nodes = Array.fill[Node](size)(Node(None, treeSize = 1))
def union(t1: Int, t2: Int): IUnionFind = {
if (t1 == t2) return this
val root1 = root(t1)
val root2 = root(t2)
if (root1 == root2) return this
val node1 = nodes(root1)
val node2 = nodes(root2)
if (node1.treeSize < node2.treeSize) {
node1.parent = Some(t2)
node2.treeSize += node1.treeSize
} else {
node2.parent = Some(t1)
node1.treeSize += node2.treeSize
}
this
}
def connected(t1: Int, t2: Int): Boolean = t1 == t2 || root(t1) == root(t2)
def root(t: Int): Int = nodes(t).parent match {
case None => t
case Some(p) =>
nodes(t).parent = Some(root(p))
nodes(t).parent.get
}
}
object Main {
def solve(sc: => Scanner): Unit = {
val ans = recursive(sc.nextLong(), 0)
println(ans._1)
println(ans._2)
}
def recursive(now: Long, index: Long): (Long, Long) = {
if (now == 1) (index, 1) else {
val ret = recursive(if (now % 2 == 0) now / 2 else now * 3 + 1, index + 1)
(ret._1, Math.max(ret._2, now))
}
}
def time(s: String): Int =
s.substring(0, 2).toInt * 60 + s.substring(3, 5).toInt
def getPermutation(begin: Long = 0): Stream[Long] =
Stream.cons(begin, getPermutation(begin + 1))
def calc(A: Array[Long]): Array[String] = {
if (A.length == 0) Array.fill(0)("")
else {
val last = A.zipWithIndex.map(x => (x._1 - x._2, x._1)).takeWhile(x => x._1 == A.head).last._2
if (last == A.head) "%d".format(A.head) +: calc(A.zipWithIndex.map(x => (x._1 - x._2, x._1)).dropWhile(x => x._1 == A.head).map(x => x._2))
else "%d-%d".format(A.head, last) +: calc(A.zipWithIndex.map(x => (x._1 - x._2, x._1)).dropWhile(x => x._1 == A.head).map(x => x._2))
}
}
var memo: Map[(Long, Long), Long] = Map[(Long, Long), Long]()
def recursive2(X: Set[Long], Y: Stream[Long]): Long = if (X.contains(Y.head)) X.size else recursive2(X + Y.head, Y.tail)
def check(i: Int, X: String): Long = {
if (X == "") 0 else check(i, X.tail) * i + X.head.toString.toLong
}
def shift(n: Long): Long = {
if (n == 0) 0
else if (n == 1) 1
else shift(n - 1) << 1
}
def unShift(n: Long): Long = {
if (n == 0) 0
else unShift(n >> 1) + 1
}
@scala.annotation.tailrec
def gcd(i: Long, j: Long): Long = {
if (i < j) gcd(j, i)
else if (j == 0) i
else gcd(j, i % j)
}
def primeFactors(i: Long): List[Long] = primeFactors_(i, 1).sorted
def primeFactors_(i: Long, j: Long): List[Long] = {
if (j * j > i) List.empty else if (i % j == 0) primeFactors_(i, j + 1) ++ List[Long](j, i / j) else primeFactors_(i, j + 1)
}
def main(args: Array[String]): Unit = {
val sc: Scanner = new Scanner(System.in)
solve(sc)
}
}
object Util {
def getPermutation(begin: Long = 0): Stream[Long] =
Stream.cons(begin, getPermutation(begin + 1))
def getPrimeList: Stream[Long] =
getPrimeListRecursive(getPermutation(begin = 2))
private def getPrimeListRecursive(A: Stream[Long]): Stream[Long] =
Stream.cons(A.head, getPrimeListRecursive(A.tail.filter(_ % A.head != 0)))
def fib(a: Long = 0, b: Long = 1, mod: Long = Long.MaxValue): Stream[Long] = a #:: fib(b % mod, (a + b) % mod, mod)
}
object ArabicRoman {
type =?>[A, B] = PartialFunction[A, B]
val codeTable = List(
(1000, "M"), (900, "CM"), (500, "D"), (400, "CD"), (100, "C"),
(90, "XC"), (50, "L"), (40, "XL"), (10, "X"), (9, "IX"), (5, "V"), (4, "IV"), (1, "I"))
val arabicToRoman: Int =?> String = {
case src if src >= 1 && src <= 3999 =>
def convert(left: Int, cont: String = "", code: List[(Int, String)] = codeTable): String = {
val (unitVal, unitChar) = code.head
left - unitVal match {
case n if n == 0 => cont + unitChar
case n if n > 0 => convert(n, cont + unitChar, code)
case _ => convert(left, cont, code.tail)
}
}
convert(src)
}
val romanToArabic: String =?> Int = {
case src if Option(src).exists { s => {
s.nonEmpty && """[^MDCLXVI]""".r.findFirstMatchIn(s.toUpperCase).isEmpty
}
} =>
def convert(left: String, cont: Int = 0, code: List[(Int, String)] = codeTable): Int = {
val (unitVal, unitChar) = code.head
left.splitAt(unitChar.length) match {
case ("", _) => cont
case (`unitChar`, tail) => convert(tail, cont + unitVal, code)
case _ => convert(left, cont, code.tail)
}
}
convert(src.toUpperCase())
}
}
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