結果

問題 No.1916 Making Palindrome on Gird
ユーザー yakamotoyakamoto
提出日時 2022-04-29 22:22:28
言語 Kotlin
(1.6.10)
結果
AC  
実行時間 628 ms / 3,000 ms
コード長 4,556 Byte
コンパイル時間 15,268 ms
使用メモリ 198,620 KB
最終ジャッジ日時 2022-04-29 22:22:59
合計ジャッジ時間 26,252 ms
ジャッジサーバーID
(参考情報)
judge11 / judge13
このコードへのチャレンジ(β)

テストケース

テストケース表示
入力 結果 実行時間
使用メモリ
testcase_00 AC 182 ms
44,296 KB
testcase_01 AC 189 ms
44,452 KB
testcase_02 AC 188 ms
44,388 KB
testcase_03 AC 178 ms
44,448 KB
testcase_04 AC 200 ms
44,776 KB
testcase_05 AC 195 ms
44,564 KB
testcase_06 AC 186 ms
44,704 KB
testcase_07 AC 181 ms
44,464 KB
testcase_08 AC 181 ms
44,452 KB
testcase_09 AC 181 ms
44,584 KB
testcase_10 AC 186 ms
44,432 KB
testcase_11 AC 182 ms
44,832 KB
testcase_12 AC 195 ms
44,488 KB
testcase_13 AC 370 ms
84,104 KB
testcase_14 AC 324 ms
83,564 KB
testcase_15 AC 437 ms
112,284 KB
testcase_16 AC 389 ms
74,664 KB
testcase_17 AC 519 ms
151,164 KB
testcase_18 AC 515 ms
198,416 KB
testcase_19 AC 555 ms
198,560 KB
testcase_20 AC 506 ms
198,344 KB
testcase_21 AC 542 ms
198,300 KB
testcase_22 AC 528 ms
198,472 KB
testcase_23 AC 412 ms
198,200 KB
testcase_24 AC 451 ms
198,056 KB
testcase_25 AC 485 ms
198,272 KB
testcase_26 AC 447 ms
198,336 KB
testcase_27 AC 409 ms
197,792 KB
testcase_28 AC 628 ms
198,444 KB
testcase_29 AC 593 ms
198,388 KB
testcase_30 AC 553 ms
198,396 KB
testcase_31 AC 601 ms
198,620 KB
testcase_32 AC 573 ms
198,268 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:168:11: 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:172:11: 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:176:11: 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:180:11: 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:182:11: 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:189:11: 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:196:11: 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:213:11: 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 (H, W) = na(2)
    val grid = Array(H){ns()}
    val N = H + W - 1
    val dp = Array(N){Array(H){LongArray(H)}}
    if (N == 1) {
      out.println(1)
      return
    }

    val (m00, m01) = if (N % 2 == 1) {
      val m = N/2
      for (h in 0 until H) {
        val w = m - h
        if (w !in 0 until W) continue
        dp[m][h][h] = 1
      }
      Pair(N/2 - 1, N/2 + 1)
    }
    else {
      val m = N/2 - 1
      for (h in 0 until H) {
        val w = m - h
        if (w !in 0 until W) continue
        debug{"m:$m h:$h"}
        if (h + 1 in 0 until H && grid[h][w] == grid[h + 1][w]) dp[m][h][h + 1] = 1
        if (w + 1 in 0 until W && grid[h][w] == grid[h][w + 1]) dp[m][h][h] = 1
      }
      Pair(N/2 - 2, N/2 + 1)
    }
    debug{"$m00:$m01"}
    for (i in 0 until N) {
      debug{"dp[$i]"}
      debug { dp[i].map { it.joinToString(" ") }.joinToString("\n") }
    }

    for (i in 0 .. min(N - m01, m00)) {
      val m0 = m00 - i
      val m1 = m01 + i
      for (h0 in 0 until H) {
        val w0 = m0 - h0
        if (w0 !in 0 until W) continue

        for (h1 in 0 until H) {
          val w1 = m1 - h1
          if (w1 !in 0 until W) continue

          if (grid[h0][w0] != grid[h1][w1]) continue

          for (dh0 in 0 until 2) {
            for (dh1 in -1 .. 0) {
              if (h0 + dh0 !in 0 until H) continue
              if (h1 + dh1 !in 0 until H) continue

              dp[m0][h0][h1] = (dp[m0][h0][h1] + dp[m0 + 1][h0 + dh0][h1 + dh1]) % MOD
            }
          }
        }
      }
    }
    out.println(dp[0][0][H - 1])
  }













































  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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