結果

問題 No.2 素因数ゲーム
ユーザー yakamotoyakamoto
提出日時 2018-12-25 02:56:40
言語 Scala(Beta)
(3.4.0)
結果
AC  
実行時間 949 ms / 5,000 ms
コード長 3,202 bytes
コンパイル時間 9,675 ms
コンパイル使用メモリ 257,120 KB
実行使用メモリ 62,772 KB
最終ジャッジ日時 2023-09-13 21:57:28
合計ジャッジ時間 41,873 ms
ジャッジサーバーID
(参考情報)
judge15 / judge11
このコードへのチャレンジ
(要ログイン)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 919 ms
62,448 KB
testcase_01 AC 913 ms
62,324 KB
testcase_02 AC 906 ms
62,492 KB
testcase_03 AC 920 ms
62,324 KB
testcase_04 AC 904 ms
62,428 KB
testcase_05 AC 922 ms
62,564 KB
testcase_06 AC 914 ms
62,772 KB
testcase_07 AC 932 ms
62,324 KB
testcase_08 AC 935 ms
62,344 KB
testcase_09 AC 914 ms
62,200 KB
testcase_10 AC 918 ms
62,612 KB
testcase_11 AC 920 ms
62,336 KB
testcase_12 AC 924 ms
62,720 KB
testcase_13 AC 929 ms
62,324 KB
testcase_14 AC 924 ms
62,456 KB
testcase_15 AC 949 ms
62,344 KB
testcase_16 AC 920 ms
62,356 KB
testcase_17 AC 925 ms
62,388 KB
testcase_18 AC 907 ms
62,308 KB
testcase_19 AC 914 ms
62,360 KB
testcase_20 AC 912 ms
62,232 KB
testcase_21 AC 916 ms
62,372 KB
testcase_22 AC 914 ms
62,284 KB
testcase_23 AC 916 ms
62,584 KB
testcase_24 AC 915 ms
62,336 KB
testcase_25 AC 927 ms
62,336 KB
testcase_26 AC 930 ms
62,248 KB
testcase_27 AC 929 ms
62,348 KB
testcase_28 AC 923 ms
62,360 KB
testcase_29 AC 922 ms
62,216 KB
testcase_30 AC 916 ms
62,508 KB
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ソースコード

diff #

object Main {
  def main(args: Array[String]): Unit = {
    val s = new Main()
    s.solve()
    s.out.flush()
  }
}

class Main {
  import java.io._
  import java.util.StringTokenizer

  import scala.collection.mutable
  import scala.util.Sorting
  import math.{abs, max, min}
  import mutable.{ArrayBuffer, ListBuffer}
  import scala.reflect.ClassTag

  val MOD = 1000000007
  val out = new PrintWriter(System.out)

  def solve(): Unit = {
    val N = ni()
    val F = factorize(N)
    val xor = F.values.reduce(_ ^ _)
    if (xor != 0) out.println("Alice") else out.println("Bob")
  }

  /**
    * *注意* 10^12以上ぐらいからは使わないこと
    */
  def factorize(n: Long): mutable.Map[Long, Long] = {
    import scala.collection.mutable
    val res = mutable.Map[Long, Long]() withDefaultValue 0

    def minFactor(n0: Long, rt: Int, i: Int): Long = {
      if (i > rt) n0 // √n まで見つからなかったら n0は素数か1
      else if (n0 % i == 0) i
      else minFactor(n0, rt, i + 1)
    }

    def step(n0: Long): Unit = {
      minFactor(n0, math.sqrt(n0).toInt, 2) match {
        case 1 =>
        case f =>
          res(f) = res(f) + 1
          step(n0 / f)
      }
    }

    step(n)
    res
  }

  class InputReader(val stream: InputStream) {
    private val reader = new BufferedReader(new InputStreamReader(stream), 32768)
    private var tokenizer: StringTokenizer = _

    def next(): String = {
      while (tokenizer == null || !tokenizer.hasMoreTokens)
        tokenizer = new StringTokenizer(reader.readLine)
      tokenizer.nextToken
    }

    def nextInt(): Int = next().toInt
    def nextLong(): Long = next().toLong
    def nextChar(): Char = next().charAt(0)
  }
  val sc = new InputReader(System.in)
  def ni(): Int = sc.nextInt()
  def nl(): Long = sc.nextLong()
  def nc(): Char = sc.nextChar()
  def ns(): String = sc.next()
  def ns(n: Int): Array[Char] = ns().toCharArray
  def na(n: Int, offset: Int = 0): Array[Int] = map(n)(_ => ni() + offset)
  def na2(n: Int, offset: Int = 0): (Array[Int], Array[Int]) = {
    val A1, A2 = Array.ofDim[Int](n)
    REP(n) { i =>
      A1(i) = ni() + offset
      A2(i) = ni() + offset
    }
    (A1, A2)
  }
  def nm(n: Int, m: Int): Array[Array[Int]] = {
    val A = Array.ofDim[Int](n, m)
    REP(n) { i =>
      REP(m) { j =>
        A(i)(j) = ni()
      }
    }
    A
  }
  def nal(n: Int): Array[Long] = map(n)(_ => nl())
  def nm_c(n: Int, m: Int): Array[Array[Char]] = map(n) (_ => ns(m))
  def REP(n: Int, offset: Int = 0)(f: Int => Unit): Unit = {
    var i = offset
    val N = n + offset
    while(i < N) { f(i); i += 1 }
  }
  def REP_r(n: Int, offset: Int = 0)(f: Int => Unit): Unit = {
    var i = n - 1 + offset
    while(i >= offset) { f(i); i -= 1 }
  }

  def map[@specialized A: ClassTag](n: Int, offset: Int = 0)(f: Int => A): Array[A] = {
    val res = Array.ofDim[A](n)
    REP(n)(i => res(i) = f(i + offset))
    res
  }


  def sumL(as: Array[Int]): Long = {
    var s = 0L
    REP(as.length)(i => s += as(i))
    s
  }

  def cumSum(as: Array[Int]) = {
    val cum = Array.ofDim[Long](as.length + 1)
    REP(as.length) { i =>
      cum(i + 1) = cum(i) + as(i)
    }
    cum
  }
}
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