結果

問題 No.1493 隣接xor
ユーザー yakamotoyakamoto
提出日時 2021-05-01 18:27:12
言語 Kotlin
(1.9.23)
結果
AC  
実行時間 652 ms / 2,000 ms
コード長 3,159 bytes
コンパイル時間 15,766 ms
コンパイル使用メモリ 434,344 KB
実行使用メモリ 72,928 KB
最終ジャッジ日時 2023-09-27 08:16:23
合計ジャッジ時間 35,191 ms
ジャッジサーバーID
（参考情報） 		judge14 / judge12
このコードへのチャレンジ
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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 266 ms
50,356 KB
testcase_01 AC 268 ms
50,424 KB
testcase_02 AC 270 ms
50,632 KB
testcase_03 AC 636 ms
72,492 KB
testcase_04 AC 652 ms
72,652 KB
testcase_05 AC 628 ms
72,908 KB
testcase_06 AC 627 ms
72,612 KB
testcase_07 AC 635 ms
72,660 KB
testcase_08 AC 628 ms
72,620 KB
testcase_09 AC 644 ms
72,480 KB
testcase_10 AC 617 ms
72,928 KB
testcase_11 AC 632 ms
72,604 KB
testcase_12 AC 645 ms
72,548 KB
testcase_13 AC 516 ms
64,448 KB
testcase_14 AC 464 ms
57,948 KB
testcase_15 AC 268 ms
50,580 KB
testcase_16 AC 266 ms
50,644 KB
testcase_17 AC 269 ms
50,368 KB
testcase_18 AC 269 ms
50,344 KB
testcase_19 AC 271 ms
50,340 KB
testcase_20 AC 514 ms
64,352 KB
testcase_21 AC 534 ms
62,328 KB
testcase_22 AC 466 ms
58,096 KB
testcase_23 AC 515 ms
64,816 KB
testcase_24 AC 612 ms
72,884 KB
testcase_25 AC 458 ms
58,328 KB
testcase_26 AC 539 ms
62,784 KB
testcase_27 AC 444 ms
56,044 KB
testcase_28 AC 565 ms
66,704 KB
testcase_29 AC 520 ms
62,168 KB
権限があれば一括ダウンロードができます
コンパイルメッセージ
Main.kt:123:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
  private inline fun debug(a: LongArray) {
          ^
Main.kt:127:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
  private inline fun debug(a: IntArray) {
          ^
Main.kt:131:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
  private inline fun debug(a: BooleanArray) {
          ^
Main.kt:135:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
  private inline fun toString(a: BooleanArray) = run{a.map { if (it) 1 else 0 }.joinToString("")}
          ^
Main.kt:137:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
  private inline fun debugDim(A: Array<LongArray>) {
          ^
Main.kt:144:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
  private inline fun debugDim(A: Array<IntArray>) {
          ^
Main.kt:151:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
  private inline fun debugDim(A: Array<BooleanArray>) {
          ^
Main.kt:168:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
  private inline fun assert(b: Boolean) = run{if (!b) throw AssertionError()}
          ^

ソースコード

diff # 

import java.io.BufferedReader
import java.io.InputStream
import java.io.InputStreamReader
import java.lang.AssertionError
import java.util.*
import kotlin.math.abs
import kotlin.math.max
import kotlin.math.min

val MOD = 1_000_000_007

class Solver(stream: InputStream, private val out: java.io.PrintWriter) {
  private val reader = BufferedReader(InputStreamReader(stream), 32768)

  fun solve() {
    val N = ni()
    val A = na(N)
    val cum = IntArray(N + 1)
    for (i in 0 until N) {
      cum[i + 1] = cum[i] xor A[i]
    }
    debug(cum)
    var ans = 1L
    val dp = HashMap<Int, Long>()
    for (i in N - 1 downTo 1) {
      val prev = dp[cum[i]] ?: 0
      dp[cum[i]] = ans
      ans = (ans*2 + (MOD - prev)) % MOD
    }
    out.println(ans)
  }













































  private val isDebug = try {
    // なんか本番でエラーでる
    System.getenv("MY_DEBUG") != null
  } catch (t: Throwable) {
    false
  }

  private var tokenizer: StringTokenizer? = null
  private fun next(): String {
    while (tokenizer == null || !tokenizer!!.hasMoreTokens()) {
      tokenizer = StringTokenizer(reader.readLine())
    }
    return tokenizer!!.nextToken()
  }

  private fun ni() = next().toInt()
  private fun nl() = next().toLong()
  private fun ns() = next()
  private fun na(n: Int, offset: Int = 0): IntArray {
    return IntArray(n) { ni() + offset }
  }
  private fun nal(n: Int, offset: Int = 0): LongArray {
    val res = LongArray(n)
    for (i in 0 until n) {
      res[i] = nl() + offset
    }
    return res
  }

  private fun na2(n: Int, offset: Int = 0): Array<IntArray> {
    val a  = Array(2){IntArray(n)}
    for (i in 0 until n) {
      for (e in a) {
        e[i] = ni() + offset
      }
    }
    return a
  }

  private inline fun debug(msg: () -> String) {
    if (isDebug) System.err.println(msg())
  }

  /**
   * コーナーケースでエラー出たりするので、debug(dp[1])のように添え字付きの場合はdebug{}をつかうこと
   */
  private inline fun debug(a: LongArray) {
    debug { a.joinToString(" ") }
  }

  private inline fun debug(a: IntArray) {
    debug { a.joinToString(" ") }
  }

  private inline fun debug(a: BooleanArray) {
    debug { toString(a) }
  }

  private inline fun toString(a: BooleanArray) = run{a.map { if (it) 1 else 0 }.joinToString("")}

  private inline fun debugDim(A: Array<LongArray>) {
    if (isDebug) {
      for (a in A) {
        debug(a)
      }
    }
  }
  private inline fun debugDim(A: Array<IntArray>) {
    if (isDebug) {
      for (a in A) {
        debug(a)
      }
    }
  }
  private inline fun debugDim(A: Array<BooleanArray>) {
    if (isDebug) {
      for (a in A) {
        debug(a)
      }
    }
  }

  /**
   * 勝手にimport消されるのを防ぎたい
   */
  private fun hoge() {
    min(1, 2)
    max(1, 2)
    abs(-10)
  }

  private inline fun assert(b: Boolean) = run{if (!b) throw AssertionError()}
  private inline fun assert(b: Boolean, f: () -> String) = run{if (!b) throw AssertionError(f())}
}

fun main() {
  val out = java.io.PrintWriter(System.out)
  Solver(System.`in`, out).solve()
  out.flush()
}
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