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 293 ms / 2,000 ms
コード長 3,393 bytes
コンパイル時間 13,943 ms
コンパイル使用メモリ 455,636 KB
実行使用メモリ 51,852 KB
最終ジャッジ日時 2024-06-29 12:01:21
合計ジャッジ時間 27,358 ms
ジャッジサーバーID
（参考情報） 		judge5 / 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 245 ms
49,868 KB
testcase_01 AC 257 ms
50,040 KB
testcase_02 AC 246 ms
49,920 KB
testcase_03 AC 237 ms
49,896 KB
testcase_04 AC 246 ms
50,140 KB
testcase_05 AC 258 ms
49,868 KB
testcase_06 AC 275 ms
50,704 KB
testcase_07 AC 289 ms
51,452 KB
testcase_08 AC 246 ms
50,016 KB
testcase_09 AC 264 ms
49,988 KB
testcase_10 AC 249 ms
50,304 KB
testcase_11 AC 276 ms
51,236 KB
testcase_12 AC 283 ms
51,124 KB
testcase_13 AC 268 ms
51,104 KB
testcase_14 AC 274 ms
51,512 KB
testcase_15 AC 273 ms
51,380 KB
testcase_16 AC 240 ms
50,072 KB
testcase_17 AC 238 ms
49,932 KB
testcase_18 AC 238 ms
50,000 KB
testcase_19 AC 243 ms
50,148 KB
testcase_20 AC 246 ms
50,000 KB
testcase_21 AC 242 ms
49,944 KB
testcase_22 AC 246 ms
49,928 KB
testcase_23 AC 250 ms
49,948 KB
testcase_24 AC 242 ms
49,892 KB
testcase_25 AC 238 ms
50,152 KB
testcase_26 AC 279 ms
51,656 KB
testcase_27 AC 283 ms
51,716 KB
testcase_28 AC 290 ms
51,836 KB
testcase_29 AC 288 ms
51,480 KB
testcase_30 AC 285 ms
51,656 KB
testcase_31 AC 278 ms
51,464 KB
testcase_32 AC 282 ms
51,644 KB
testcase_33 AC 286 ms
51,728 KB
testcase_34 AC 292 ms
51,744 KB
testcase_35 AC 293 ms
51,628 KB
testcase_36 AC 293 ms
51,460 KB
testcase_37 AC 280 ms
51,648 KB
testcase_38 AC 284 ms
51,852 KB
testcase_39 AC 285 ms
51,608 KB
testcase_40 AC 281 ms
51,660 KB
testcase_41 AC 278 ms
51,664 KB
testcase_42 AC 276 ms
51,620 KB
testcase_43 AC 277 ms
51,672 KB
testcase_44 AC 279 ms
51,660 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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