結果

問題 No.1580 I like Logarithm！
ユーザー yakamotoyakamoto
提出日時 2021-07-02 22:20:32
言語 Kotlin
(1.9.23)
結果
AC  
実行時間 326 ms / 2,000 ms
コード長 3,393 bytes
コンパイル時間 15,738 ms
コンパイル使用メモリ 433,456 KB
実行使用メモリ 52,644 KB
最終ジャッジ日時 2023-09-11 22:26:58
合計ジャッジ時間 31,593 ms
ジャッジサーバーID
（参考情報） 		judge15 / judge12
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
実行使用メモリ
testcase_00 AC 260 ms
50,160 KB
testcase_01 AC 262 ms
50,324 KB
testcase_02 AC 263 ms
50,300 KB
testcase_03 AC 265 ms
50,168 KB
testcase_04 AC 266 ms
50,308 KB
testcase_05 AC 266 ms
50,252 KB
testcase_06 AC 301 ms
52,548 KB
testcase_07 AC 322 ms
52,344 KB
testcase_08 AC 264 ms
50,192 KB
testcase_09 AC 275 ms
50,184 KB
testcase_10 AC 283 ms
50,288 KB
testcase_11 AC 318 ms
52,436 KB
testcase_12 AC 318 ms
52,488 KB
testcase_13 AC 307 ms
52,256 KB
testcase_14 AC 320 ms
52,440 KB
testcase_15 AC 321 ms
52,552 KB
testcase_16 AC 261 ms
50,184 KB
testcase_17 AC 269 ms
50,264 KB
testcase_18 AC 267 ms
50,260 KB
testcase_19 AC 266 ms
50,260 KB
testcase_20 AC 269 ms
50,308 KB
testcase_21 AC 266 ms
50,164 KB
testcase_22 AC 266 ms
50,328 KB
testcase_23 AC 265 ms
50,344 KB
testcase_24 AC 266 ms
50,176 KB
testcase_25 AC 266 ms
50,172 KB
testcase_26 AC 319 ms
52,396 KB
testcase_27 AC 323 ms
52,360 KB
testcase_28 AC 321 ms
52,368 KB
testcase_29 AC 325 ms
52,448 KB
testcase_30 AC 322 ms
52,644 KB
testcase_31 AC 326 ms
52,352 KB
testcase_32 AC 323 ms
52,424 KB
testcase_33 AC 324 ms
52,332 KB
testcase_34 AC 322 ms
52,364 KB
testcase_35 AC 322 ms
52,500 KB
testcase_36 AC 319 ms
52,364 KB
testcase_37 AC 319 ms
52,500 KB
testcase_38 AC 317 ms
52,528 KB
testcase_39 AC 316 ms
52,516 KB
testcase_40 AC 320 ms
52,448 KB
testcase_41 AC 317 ms
52,420 KB
testcase_42 AC 318 ms
52,508 KB
testcase_43 AC 320 ms
52,384 KB
testcase_44 AC 322 ms
52,372 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: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: LongArray) {
          ^
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 debug(a: IntArray) {
          ^
Main.kt:139:11: 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:143:11: 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:145:11: 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:152:11: 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:159:11: 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:176:11: 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 A = ni()
    val B = ns().map{it-'0'}
    val N = B.size
    var ans = 0L

    val pows = LongArray(N + 1)
    pows[N] = 1
    for (i in N - 1 downTo 0) {
      pows[i] = pows[i + 1] *A %MOD
    }
    var total = 0L
    for (i in 0 until N) {
      val log = N - 1 - i
      val c = (pows[i] + (MOD-pows[i + 1])) %MOD
      if (i > 0) ans = (ans + c*log) %MOD
      total = (total + pows[i + 1]*B[i]) %MOD
    }

    val remain = (total + (MOD - pows[1]) + 1) %MOD
    debug{"total:$total remain:$remain pow:${pows[1]}"}
    ans = (ans + remain*(N - 1)) %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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