結果
問題 | No.1390 Get together |
ユーザー | tzyvrn |
提出日時 | 2021-02-12 23:20:26 |
言語 | Kotlin (1.9.23) |
結果 |
TLE
|
実行時間 | - |
コード長 | 2,822 bytes |
コンパイル時間 | 15,576 ms |
コンパイル使用メモリ | 449,316 KB |
実行使用メモリ | 117,984 KB |
最終ジャッジ日時 | 2024-07-20 01:01:22 |
合計ジャッジ時間 | 27,426 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
(要ログイン)
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 | 349 ms
54,316 KB |
testcase_01 | AC | 358 ms
87,096 KB |
testcase_02 | AC | 358 ms
56,604 KB |
testcase_03 | AC | 611 ms
59,672 KB |
testcase_04 | AC | 557 ms
57,368 KB |
testcase_05 | AC | 611 ms
59,340 KB |
testcase_06 | AC | 621 ms
58,216 KB |
testcase_07 | AC | 576 ms
58,036 KB |
testcase_08 | AC | 616 ms
58,224 KB |
testcase_09 | AC | 580 ms
59,536 KB |
testcase_10 | AC | 353 ms
51,004 KB |
testcase_11 | AC | 355 ms
51,096 KB |
testcase_12 | AC | 354 ms
51,372 KB |
testcase_13 | AC | 357 ms
51,124 KB |
testcase_14 | AC | 353 ms
51,256 KB |
testcase_15 | AC | 347 ms
50,936 KB |
testcase_16 | TLE | - |
testcase_17 | -- | - |
testcase_18 | -- | - |
testcase_19 | -- | - |
testcase_20 | -- | - |
testcase_21 | -- | - |
testcase_22 | -- | - |
testcase_23 | -- | - |
testcase_24 | -- | - |
testcase_25 | -- | - |
testcase_26 | -- | - |
testcase_27 | -- | - |
testcase_28 | -- | - |
testcase_29 | -- | - |
testcase_30 | -- | - |
testcase_31 | -- | - |
ソースコード
import java.util.* fun main() { val sc = Scanner(System.`in`) val n = sc.nextInt() val m = sc.nextInt() val slimes = List(n) { Pair(sc.nextInt() - 1, sc.nextInt() - 1) } val dsu = DSU(m) val color_leaders = MutableList(n) { -1 } for ((box, color) in slimes) { if (color_leaders[color] == -1) { color_leaders[color] = box } else { dsu.merge(box, color_leaders[color]) } } val seen = mutableListOf<Int>() var ans = 0 for (i in 0 until m) { if (seen.contains(dsu.leader(i))) { continue } ans += dsu.size(i) - 1 seen.add(dsu.leader(i)) } println(ans) } fun eprintln(obj: Any) = System.err.println(obj.toString()) /** * Disjoint set union. * * convert from [AtCoderLibraryForJava - DSU](https://github.com/NASU41/AtCoderLibraryForJava/blob/8b3a3b599790a9ca8c7dd92e036af4ddc5be1b05/DSU/DSU.java) */ class DSU(private val n: Int) { private val parentOrSize: IntArray = IntArray(n) { -1 } /** * Merge nodes. */ fun merge(a: Int, b: Int): Int { if (a !in 0 until n) throw IndexOutOfBoundsException("a=$a") if (b !in 0 until n) throw IndexOutOfBoundsException("b=$b") var x = leader(a) var y = leader(b) if (x == y) return x if (-parentOrSize[x] < -parentOrSize[y]) { val tmp = x x = y y = tmp } parentOrSize[x] += parentOrSize[y] parentOrSize[y] = x return x } /** * True if two nodes are connected. */ fun same(a: Int, b: Int): Boolean { if (a !in 0 until n) throw IndexOutOfBoundsException("a=$a") if (b !in 0 until n) throw IndexOutOfBoundsException("b=$b") return leader(a) == leader(b) } /** * Get its leader node. */ fun leader(a: Int): Int { return if (parentOrSize[a] < 0) { a } else { parentOrSize[a] = leader(parentOrSize[a]) parentOrSize[a] } } /** * A group's size. */ fun size(a: Int): Int { if (a !in 0 until n) throw IndexOutOfBoundsException("" + a) return -parentOrSize[leader(a)] } /** * Group by leader. */ fun groups(): ArrayList<ArrayList<Int>> { val leaderBuf = IntArray(n) val groupSize = IntArray(n) for (i in 0 until n) { leaderBuf[i] = leader(i) groupSize[leaderBuf[i]]++ } val result = ArrayList<ArrayList<Int>>(n) for (i in 0 until n) { result.add(ArrayList(groupSize[i])) } for (i in 0 until n) { result[leaderBuf[i]].add(i) } result.removeIf { it.isEmpty() } return result } }