結果
| 問題 | No.2 素因数ゲーム |
| コンテスト | |
| ユーザー |
yakamoto
|
| 提出日時 | 2018-12-25 02:56:40 |
| 言語 | Scala(Beta) (3.6.2) |
| 結果 |
AC
|
| 実行時間 | 927 ms / 5,000 ms |
| コード長 | 3,202 bytes |
| コンパイル時間 | 10,121 ms |
| コンパイル使用メモリ | 274,276 KB |
| 実行使用メモリ | 65,188 KB |
| 最終ジャッジ日時 | 2024-07-01 06:16:01 |
| 合計ジャッジ時間 | 40,372 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 31 |
ソースコード
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
}
}
yakamoto