結果

問題 No.1646 Avoid Palindrome
ユーザー yakamotoyakamoto
提出日時 2021-08-13 23:29:54
言語 Kotlin
(1.9.23)
結果
AC  
実行時間 837 ms / 3,000 ms
コード長 4,630 bytes
コンパイル時間 18,169 ms
コンパイル使用メモリ 473,156 KB
実行使用メモリ 81,200 KB
最終ジャッジ日時 2024-11-08 16:03:09
合計ジャッジ時間 48,014 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge2
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 295 ms
53,404 KB
testcase_01 AC 294 ms
53,444 KB
testcase_02 AC 296 ms
53,196 KB
testcase_03 AC 297 ms
53,136 KB
testcase_04 AC 786 ms
79,116 KB
testcase_05 AC 706 ms
78,224 KB
testcase_06 AC 785 ms
78,348 KB
testcase_07 AC 754 ms
78,992 KB
testcase_08 AC 720 ms
78,308 KB
testcase_09 AC 750 ms
78,152 KB
testcase_10 AC 704 ms
78,172 KB
testcase_11 AC 782 ms
78,300 KB
testcase_12 AC 701 ms
78,228 KB
testcase_13 AC 814 ms
79,648 KB
testcase_14 AC 755 ms
77,752 KB
testcase_15 AC 764 ms
78,112 KB
testcase_16 AC 758 ms
77,692 KB
testcase_17 AC 791 ms
78,732 KB
testcase_18 AC 759 ms
78,064 KB
testcase_19 AC 760 ms
77,960 KB
testcase_20 AC 758 ms
78,300 KB
testcase_21 AC 791 ms
78,616 KB
testcase_22 AC 762 ms
77,680 KB
testcase_23 AC 791 ms
78,540 KB
testcase_24 AC 794 ms
79,520 KB
testcase_25 AC 784 ms
79,592 KB
testcase_26 AC 800 ms
79,644 KB
testcase_27 AC 796 ms
79,556 KB
testcase_28 AC 781 ms
79,528 KB
testcase_29 AC 732 ms
80,244 KB
testcase_30 AC 795 ms
80,744 KB
testcase_31 AC 773 ms
80,536 KB
testcase_32 AC 765 ms
80,532 KB
testcase_33 AC 761 ms
80,492 KB
testcase_34 AC 790 ms
79,632 KB
testcase_35 AC 293 ms
53,480 KB
testcase_36 AC 292 ms
53,404 KB
testcase_37 AC 301 ms
53,324 KB
testcase_38 AC 289 ms
53,132 KB
testcase_39 AC 295 ms
53,320 KB
testcase_40 AC 292 ms
53,412 KB
testcase_41 AC 294 ms
53,316 KB
testcase_42 AC 293 ms
53,192 KB
testcase_43 AC 837 ms
81,200 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:178:11: 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:182:11: 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:186:11: 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:190:11: 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:192:11: 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:199:11: 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:206:11: 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:223:11: 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 = 998244353

fun powMod(a: Long, n: Long, mod: Int): Long {
  if (n == 0L) return 1
  val res = powMod(a * a % mod, n / 2, mod)
  return if (n % 2 == 1L) res * a % mod else res
}
class Solver(stream: InputStream, private val out: java.io.PrintWriter) {
  private val reader = BufferedReader(InputStreamReader(stream), 32768)

  fun solve() {
    val N = ni()
    val S = ns()

    val R = 28
    var cur = Array(2){LongArray(R*R)}
    var next = Array(2){LongArray(R*R)}
    cur[0][26*R + 27] = 1
    
    fun countPal(): Long {
      for (i in 0 until N) {
        next[0].fill(0)
        next[1][0] = 0

        val sum1 = LongArray(R)
        val sum2 = LongArray(R)
        for (c1 in 0 until R) {
          for (c2 in 0 until R) {
            val s = c1 * R + c2
            sum1[c1] += cur[0][s]
            sum2[c2] += cur[0][s]
          }
        }
        debug{"i:$i"}
        debug(sum1)
        debug(sum2)

        fun doIt(c3: Int) {
          next[1][0] += sum1[c3] + sum2[c3]
          for (c2 in 0 until R) {
            if (c2 == c3) continue
            next[0][c2*R + c3] += sum2[c2] + MOD - (cur[0][c3*R+c2])%MOD
          }
        }

        if (S[i] == '?') {
          for (c3 in 0 until 26) {
            doIt(c3)
            next[1][0] += cur[1][0]
          }
        }
        else {
          val c3 = S[i]-'a'
          doIt(c3)
          next[1][0] += cur[1][0]
        }

        for (c1 in 0 until R) {
          for (c2 in 0 until R) {
            val s = c1*R + c2
            next[0][s] = next[0][s] % MOD
            next[1][0] = next[1][0] % MOD
          }
        }

        val tmp = cur
        cur = next
        next = tmp
      }

      return cur[1][0]
    }

    val M = S.count{it == '?'}
    val ans = (powMod(26, M.toLong(), MOD) + (MOD - countPal())) % 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())}

  companion object {
    // TestRunnerから呼びたいので単純なmainじゃだめ
    fun main() {
      val out = java.io.PrintWriter(System.out)
      Solver(System.`in`, out).solve()
      out.flush()
    }
  }
}

/**
 * judgeから呼ばれる
 */
fun main() = Solver.main()
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