結果

問題 No.1657 Sum is Prime (Easy Version)
ユーザー yakamotoyakamoto
提出日時 2021-08-27 21:55:22
言語 Kotlin
(1.9.23)
結果
AC  
実行時間 324 ms / 2,000 ms
コード長 3,932 bytes
コンパイル時間 21,703 ms
コンパイル使用メモリ 437,432 KB
実行使用メモリ 57,668 KB
最終ジャッジ日時 2023-08-13 08:48:37
合計ジャッジ時間 27,660 ms
ジャッジサーバーID
（参考情報） 		judge11 / judge14
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 266 ms
50,312 KB
testcase_01 AC 264 ms
50,184 KB
testcase_02 AC 319 ms
57,324 KB
testcase_03 AC 266 ms
50,380 KB
testcase_04 AC 264 ms
50,292 KB
testcase_05 AC 268 ms
50,000 KB
testcase_06 AC 270 ms
50,216 KB
testcase_07 AC 264 ms
50,400 KB
testcase_08 AC 270 ms
49,996 KB
testcase_09 AC 282 ms
50,124 KB
testcase_10 AC 271 ms
50,208 KB
testcase_11 AC 274 ms
50,288 KB
testcase_12 AC 324 ms
57,112 KB
testcase_13 AC 306 ms
57,068 KB
testcase_14 AC 314 ms
57,124 KB
testcase_15 AC 316 ms
57,148 KB
testcase_16 AC 299 ms
54,408 KB
testcase_17 AC 308 ms
55,048 KB
testcase_18 AC 308 ms
57,132 KB
testcase_19 AC 319 ms
57,132 KB
testcase_20 AC 310 ms
57,012 KB
testcase_21 AC 323 ms
57,668 KB
testcase_22 AC 317 ms
57,320 KB
testcase_23 AC 324 ms
57,584 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:158:11: 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:162:11: 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:166:11: 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:170:11: 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: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<LongArray>) {
          ^
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<IntArray>) {
          ^
Main.kt:186:11: 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:203:11: 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 (L, R) = na(2)

    val MAX = 2*R + 100
    val flg = BooleanArray(MAX + 1){true}
    val primes = mutableListOf<Int>()
    flg[0] = false
    flg[1] = false

    for (i in 2 ..MAX) {
      if (!flg[i]) continue
      primes += i

      var j = i * 2
      while (j <= MAX) {
        flg[j] = false
        j += i
      }
    }

    /**
     * R^2　までの数値を判定できる
     */
    fun isPrime(a: Int): Boolean {
      for (p in primes) {
        if (a <= p) return true
        if (a % p == 0) return false
      }
      return true
    }

    var ans = 0L
    for (a in L .. R) {
      run { // a-b = 1
        val b = a - 1
        if (b + 1 in (L..R)) {
          val x = a + b + 1
          if (x % 2 == 0 && flg[x / 2]) ans++
        }
      }

      run { // a - b = 2
        val b = a - 2
        if (b + 1 in (L..R)) {
          val x = a + b + 1
          if (flg[x]) ans++
        }
      }
    }

    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())}

  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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