結果

問題 No.1701 half price
ユーザー yakamotoyakamoto
提出日時 2021-10-08 22:25:10
言語 Kotlin
(1.9.23)
結果
AC  
実行時間 447 ms / 3,000 ms
コード長 3,907 bytes
コンパイル時間 17,237 ms
コンパイル使用メモリ 467,320 KB
実行使用メモリ 54,876 KB
最終ジャッジ日時 2024-07-23 04:58:58
合計ジャッジ時間 24,910 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge3
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 272 ms
54,380 KB
testcase_01 AC 287 ms
54,404 KB
testcase_02 AC 312 ms
54,576 KB
testcase_03 AC 283 ms
54,420 KB
testcase_04 AC 336 ms
54,700 KB
testcase_05 AC 284 ms
54,456 KB
testcase_06 AC 444 ms
54,812 KB
testcase_07 AC 419 ms
54,688 KB
testcase_08 AC 283 ms
54,444 KB
testcase_09 AC 284 ms
54,376 KB
testcase_10 AC 279 ms
54,396 KB
testcase_11 AC 279 ms
54,472 KB
testcase_12 AC 276 ms
54,356 KB
testcase_13 AC 275 ms
54,412 KB
testcase_14 AC 280 ms
54,300 KB
testcase_15 AC 279 ms
54,412 KB
testcase_16 AC 281 ms
54,240 KB
testcase_17 AC 369 ms
54,784 KB
testcase_18 AC 277 ms
54,388 KB
testcase_19 AC 306 ms
54,876 KB
testcase_20 AC 277 ms
54,340 KB
testcase_21 AC 447 ms
54,692 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:151:11: 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:155:11: 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:159:11: 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:163:11: 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:165:11: 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:172:11: 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:179:11: 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:196:11: 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

/**
 * 桁が大きすぎるとBigIntegerで間に合わなくなる
 * 99 -> 100 のようなケースに対応するため、digitsは一桁多めに用意すること
 */
fun incr(digits: IntArray) {
  var i = 0
  digits[i]++
  while (digits[i] == 3) {
    digits[i] = 0
    digits[i + 1]++
    i++
  }
}
class Solver(stream: InputStream, private val out: java.io.PrintWriter) {
  private val reader = BufferedReader(InputStreamReader(stream), 32768)

  fun solve() {
    val (N, W) = na(2)
    val A = na(N)
    val ans = BooleanArray(1 shl N)
    var n = 1
    for (i in 0 until N) {
      n *= 3
    }
    val flg = IntArray(N + 1)
    for (bit in 0 until n - 1) {
      incr(flg)
      var sum = 0L
      for (i in 0 until N) {
        sum += when(flg[i]) {
          1 -> A[i]
          2 -> A[i]/2
          else -> 0
        }
      }
      if (sum == W.toLong()) {
//        debug(flg)
        var f = 0
        for (i in 0 until N) {
          if (flg[i] > 0) {
            f += 1 shl i
          }
        }
        ans[f] = true
      }
    }
    out.println(ans.count { it })
  }













































  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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