結果

問題 No.1439 Let's Compare!!!!
ユーザー yakamotoyakamoto
提出日時 2021-03-26 21:53:46
言語 Kotlin
(1.9.23)
結果
AC  
実行時間 1,108 ms / 2,000 ms
コード長 4,603 bytes
コンパイル時間 19,354 ms
コンパイル使用メモリ 465,432 KB
実行使用メモリ 94,052 KB
最終ジャッジ日時 2024-05-06 22:22:18
合計ジャッジ時間 29,604 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge5
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 277 ms
56,832 KB
testcase_01 AC 285 ms
56,896 KB
testcase_02 AC 280 ms
56,812 KB
testcase_03 AC 287 ms
56,852 KB
testcase_04 AC 291 ms
56,984 KB
testcase_05 AC 284 ms
56,748 KB
testcase_06 AC 278 ms
56,712 KB
testcase_07 AC 407 ms
59,028 KB
testcase_08 AC 417 ms
59,076 KB
testcase_09 AC 379 ms
59,084 KB
testcase_10 AC 942 ms
89,708 KB
testcase_11 AC 813 ms
90,272 KB
testcase_12 AC 1,108 ms
94,012 KB
testcase_13 AC 927 ms
90,372 KB
testcase_14 AC 801 ms
90,400 KB
testcase_15 AC 956 ms
93,868 KB
testcase_16 AC 937 ms
94,020 KB
testcase_17 AC 931 ms
94,052 KB
testcase_18 AC 774 ms
93,196 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:55:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
  private inline fun sub(a: Int, b: Int) = a - b
          ^
Main.kt:56:11: warning: expected performance impact from inlining is insignificant. Inlining works best for functions with parameters of functional types
  private inline fun lt(a: Int, b: Int) = a < b
          ^
Main.kt:201:11: 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:205:11: 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:209:11: 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:213:11: 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:215:11: 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:222:11: 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:229:11: 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:246:

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

/**
 * RangeUpdateTreeと同等と考える
 */
class BIT(val n: Int) {
  private val N =
    if (Integer.highestOneBit(n) == n) n
    else Integer.highestOneBit(n) shl 1

  private val bit = IntArray(N + 1)

  /**
   * 0-indexed
   */
  fun get(i: Int): Int {
    var x = i + 1
    var s = 0
    while(x > 0) {
      s += bit[x]
      x -= x and -x
    }
    return s
  }

  /**
   * i: 0-indexed
   */
  fun addFrom(i: Int, a: Int) {
    var x = i + 1
    while(x <= N) {
      bit[x] += a
      x += x and -x
    }
  }

  /**
   * i: 0-indexed
   */
  fun addAt(i: Int, a: Int) {
    addFrom(i, a)
    addFrom(i + 1, -a)
  }


  private inline fun sub(a: Int, b: Int) = a - b
  private inline fun lt(a: Int, b: Int) = a < b

  /**
   * ↑の中身変えること
   * 累積後の値が単調増加になっていること
   * @return 0-indexed 見つからなかったら n
   */
  fun lowerBound(W: Int): Int {
    var k = N
    var x = 0
    var w = W
    while(k > 0) {
      if (x + k <= N && lt(bit[x + k], w)) {
        w = sub(w, bit[x + k])
        x += k
      }
      k /= 2
    }
    return min(n, x)
  }
}
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().map{it-'0'}.toIntArray()
    val T = ns().map{it-'0'}.toIntArray()
    val Q = ni()
    val bit = BIT(N)
    for (i in 0 until N) {
      if (S[i] != T[i]) bit.addFrom(i, 1)
    }
    for (q in 0 until Q) {
      val str = when(ns()) {
        "S" -> S
        else -> T
      }
      val i = ni() - 1
      val d = ni()
      val prev = if (S[i] == T[i]) 0 else 1
      str[i] = d
      val next = if (S[i] == T[i]) 0 else 1
      val add = next - prev
      bit.addFrom(i, add)
      val idx = bit.lowerBound(1)
      val ans = if (idx == N) "="
      else {
        if (S[idx] < T[idx]) "<" else ">"
      }

      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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