結果
問題 | No.2290 UnUnion Find |
ユーザー | tenten |
提出日時 | 2023-07-26 20:39:01 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 820 ms / 2,000 ms |
コード長 | 2,942 bytes |
コンパイル時間 | 2,690 ms |
コンパイル使用メモリ | 85,832 KB |
実行使用メモリ | 75,984 KB |
最終ジャッジ日時 | 2024-04-14 10:04:42 |
合計ジャッジ時間 | 38,672 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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 | 55 ms
50,184 KB |
testcase_01 | AC | 56 ms
50,236 KB |
testcase_02 | AC | 399 ms
59,164 KB |
testcase_03 | AC | 631 ms
65,280 KB |
testcase_04 | AC | 659 ms
69,852 KB |
testcase_05 | AC | 669 ms
69,804 KB |
testcase_06 | AC | 653 ms
71,684 KB |
testcase_07 | AC | 648 ms
68,604 KB |
testcase_08 | AC | 661 ms
72,336 KB |
testcase_09 | AC | 649 ms
67,632 KB |
testcase_10 | AC | 661 ms
70,532 KB |
testcase_11 | AC | 653 ms
71,140 KB |
testcase_12 | AC | 663 ms
69,352 KB |
testcase_13 | AC | 650 ms
69,572 KB |
testcase_14 | AC | 660 ms
71,360 KB |
testcase_15 | AC | 653 ms
71,380 KB |
testcase_16 | AC | 645 ms
68,776 KB |
testcase_17 | AC | 663 ms
73,684 KB |
testcase_18 | AC | 644 ms
71,472 KB |
testcase_19 | AC | 745 ms
66,840 KB |
testcase_20 | AC | 820 ms
75,876 KB |
testcase_21 | AC | 424 ms
58,672 KB |
testcase_22 | AC | 542 ms
63,180 KB |
testcase_23 | AC | 537 ms
63,220 KB |
testcase_24 | AC | 766 ms
69,948 KB |
testcase_25 | AC | 517 ms
61,108 KB |
testcase_26 | AC | 791 ms
75,984 KB |
testcase_27 | AC | 777 ms
71,176 KB |
testcase_28 | AC | 632 ms
63,368 KB |
testcase_29 | AC | 756 ms
66,604 KB |
testcase_30 | AC | 469 ms
61,004 KB |
testcase_31 | AC | 737 ms
65,912 KB |
testcase_32 | AC | 504 ms
60,968 KB |
testcase_33 | AC | 623 ms
63,380 KB |
testcase_34 | AC | 802 ms
75,540 KB |
testcase_35 | AC | 784 ms
75,084 KB |
testcase_36 | AC | 523 ms
61,240 KB |
testcase_37 | AC | 594 ms
63,292 KB |
testcase_38 | AC | 528 ms
61,172 KB |
testcase_39 | AC | 539 ms
63,004 KB |
testcase_40 | AC | 775 ms
72,596 KB |
testcase_41 | AC | 506 ms
60,856 KB |
testcase_42 | AC | 717 ms
65,804 KB |
testcase_43 | AC | 687 ms
65,256 KB |
testcase_44 | AC | 648 ms
71,532 KB |
testcase_45 | AC | 655 ms
65,364 KB |
testcase_46 | AC | 675 ms
65,456 KB |
ソースコード
import java.io.*; import java.util.*; import java.util.stream.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); int n = sc.nextInt(); int q = sc.nextInt(); UnionFindTree uft = new UnionFindTree(n); StringBuilder sb = new StringBuilder(); while (q-- > 0) { if (sc.nextInt() == 1) { uft.unite(sc.nextInt() - 1, sc.nextInt() - 1); } else { sb.append(uft.notUnion(sc.nextInt() - 1) + 1).append("\n"); } } System.out.print(sb); } static class UnionFindTree { int[] parents; TreeSet<Integer> points = new TreeSet<>(); public UnionFindTree(int size) { parents = new int[size]; for (int i = 0; i < size; i++) { parents[i] = i; points.add(i); } } public int find(int x) { if (x == parents[x]) { return x; } else { return parents[x] = find(parents[x]); } } public void unite(int x, int y) { int xx = find(x); int yy = find(y); if (xx != yy) { parents[xx] = yy; points.remove(xx); } } public int notUnion(int x) { if (points.size() == 1) { return -2; } int xx = find(x); if (points.first() == xx) { return points.last(); } else { return points.first(); } } } } class Utilities { static String arrayToLineString(Object[] arr) { return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n")); } static String arrayToLineString(int[] arr) { return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new)); } } class Scanner { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(""); StringBuilder sb = new StringBuilder(); public Scanner() throws Exception { } public int nextInt() throws Exception { return Integer.parseInt(next()); } public long nextLong() throws Exception { return Long.parseLong(next()); } public double nextDouble() throws Exception { return Double.parseDouble(next()); } public int[] nextIntArray() throws Exception { return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray(); } public String next() throws Exception { while (!st.hasMoreTokens()) { st = new StringTokenizer(br.readLine()); } return st.nextToken(); } }