結果

問題 No.1647 Travel in Mitaru city 2
ユーザー yakamotoyakamoto
提出日時 2021-08-14 15:59:12
言語 Kotlin
(1.9.23)
結果
AC  
実行時間 1,322 ms / 2,500 ms
コード長 5,411 bytes
コンパイル時間 20,384 ms
コンパイル使用メモリ 471,040 KB
実行使用メモリ 112,476 KB
最終ジャッジ日時 2024-10-13 03:31:15
合計ジャッジ時間 72,189 ms
ジャッジサーバーID
（参考情報） 		judge3 / 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 335 ms
56,048 KB
testcase_01 AC 294 ms
50,712 KB
testcase_02 AC 332 ms
56,024 KB
testcase_03 AC 354 ms
55,968 KB
testcase_04 AC 428 ms
59,040 KB
testcase_05 AC 350 ms
56,128 KB
testcase_06 AC 362 ms
56,260 KB
testcase_07 AC 424 ms
59,684 KB
testcase_08 AC 1,172 ms
109,388 KB
testcase_09 AC 1,131 ms
107,648 KB
testcase_10 AC 1,236 ms
110,160 KB
testcase_11 AC 922 ms
102,500 KB
testcase_12 AC 926 ms
100,088 KB
testcase_13 AC 894 ms
102,824 KB
testcase_14 AC 1,163 ms
107,212 KB
testcase_15 AC 1,249 ms
109,524 KB
testcase_16 AC 1,222 ms
109,364 KB
testcase_17 AC 899 ms
106,456 KB
testcase_18 AC 900 ms
102,188 KB
testcase_19 AC 1,122 ms
106,232 KB
testcase_20 AC 977 ms
106,380 KB
testcase_21 AC 1,089 ms
105,404 KB
testcase_22 AC 1,322 ms
107,644 KB
testcase_23 AC 1,221 ms
108,260 KB
testcase_24 AC 1,092 ms
106,988 KB
testcase_25 AC 1,163 ms
109,196 KB
testcase_26 AC 1,275 ms
107,288 KB
testcase_27 AC 1,294 ms
108,748 KB
testcase_28 AC 1,086 ms
111,680 KB
testcase_29 AC 1,129 ms
109,488 KB
testcase_30 AC 1,049 ms
107,012 KB
testcase_31 AC 1,078 ms
110,036 KB
testcase_32 AC 998 ms
111,952 KB
testcase_33 AC 1,022 ms
106,284 KB
testcase_34 AC 1,084 ms
108,656 KB
testcase_35 AC 1,045 ms
110,516 KB
testcase_36 AC 1,122 ms
112,476 KB
testcase_37 AC 1,100 ms
111,920 KB
testcase_38 AC 1,165 ms
103,488 KB
testcase_39 AC 1,045 ms
101,256 KB
testcase_40 AC 1,028 ms
103,068 KB
testcase_41 AC 975 ms
101,708 KB
testcase_42 AC 1,172 ms
102,560 KB
testcase_43 AC 294 ms
50,732 KB
testcase_44 AC 351 ms
62,940 KB
testcase_45 AC 807 ms
93,552 KB
testcase_46 AC 827 ms
92,360 KB
testcase_47 AC 802 ms
93,644 KB
testcase_48 AC 860 ms
94,200 KB
testcase_49 AC 779 ms
92,852 KB
testcase_50 AC 800 ms
93,476 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: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: LongArray) {
          ^
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 debug(a: IntArray) {
          ^
Main.kt:217:11: 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:221:11: 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:223:11: 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:230:11: 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:237:11: 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:254:11: 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

fun findCycle(n: Int, m: Int, from: IntArray, to: IntArray): List<Int>? {
  data class Edge(val i: Int, val v: Int) // 外に出せ
  val que = IntArray(n + 10)
  val nodeFlag = IntArray(n)
  val visitedEdge = BooleanArray(m)
  val g = Array(n){ mutableListOf<Edge>()}
  for (i in 0 until m) {
    g[from[i]].add(Edge(i, to[i]))
    g[to[i]].add(Edge(i, from[i]))
  }
  fun dfs(rt: Int): List<Int>?  {
    fun step(pos: Int, v: Int): List<Int>? {
      que[pos] = v
      nodeFlag[v] = 1
      for (i in g[v].indices) {
        val e = g[v][i]
        if (visitedEdge[e.i]) continue
        visitedEdge[e.i] = true
        when(nodeFlag[e.v]) {
          1 -> {
            val ix = que.indexOf(e.v)
            val ans = mutableListOf<Int>()
            for (j in ix..pos) {
              ans += que[j]
            }
            return ans
          }
          0 -> {
            val res = step(pos + 1, e.v)
            if (res != null) return res
          }
          else -> {}
        }
      }
      nodeFlag[v] = 2
      return null
    }

    return step(0, rt)
  }

  for (u in 0 until n) {
    if (nodeFlag[u] == 0) {
      val res = dfs(u)
      if (res != null) return res
    }
  }
  return null
}

fun packUGraph(n: Int, from: IntArray, to: IntArray): Array<IntArray> {
  val p = IntArray(n)
  val m = from.size
  for (i in 0 until m) {
    ++p[from[i]]
    ++p[to[i]]
  }
  val g = Array(n){IntArray(p[it])}
  for (i in 0 until m) {
    g[from[i]][--p[from[i]]] = to[i]
    g[to[i]][--p[to[i]]] = from[i]
  }
  return g
}
data class Point(val h: Int, val w: Int)
class Solver(stream: InputStream, private val out: java.io.PrintWriter) {
  private val reader = BufferedReader(InputStreamReader(stream), 32768)

  fun solve() {
    val th = Thread(null, Runnable {
      solve2()
    }, "solve", 1 shl 26)
    th.start()
    th.join()
  }

  fun solve2() {
    val (H, W, M) = na(3)
    val (from, to) = na2(M, -1)
    for (i in 0 until M) {
      to[i] += H
    }
    val toP = Array(M){
      Pair(Point(from[it], to[it]), it)
    }.toMap()
    val cycle = findCycle(H + W, M, from, to)
    if (cycle == null) {
      out.println(-1)
      return
    }

    debug{"cycle:$cycle"}

    val N = cycle.size
    var i = if (cycle.first() < H) 0 else 1 // Hスタートかどうか
    val ans = IntArray(N)
    for (j in 0 until N) {
      val i2 = (i + 1) % N
      val p = if (j % 2 == 0) Point(cycle[i], cycle[i2]) else Point(cycle[i2], cycle[i])
      debug{"$j $p"}
      ans[j] = toP[p]!!
      i = i2
    }
    out.println(N)
    out.println(ans.map{it+1}.joinToString(" "))
  }













































  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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