結果
問題 | No.2325 Skill Tree |
ユーザー |
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提出日時 | 2023-05-30 14:10:56 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 1,549 ms / 3,000 ms |
コード長 | 3,108 bytes |
コンパイル時間 | 5,308 ms |
コンパイル使用メモリ | 85,536 KB |
実行使用メモリ | 88,960 KB |
最終ジャッジ日時 | 2024-12-28 11:49:56 |
合計ジャッジ時間 | 42,452 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 36 |
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(); ArrayList<ArrayList<Integer>> graph = new ArrayList<>(); for (int i = 0; i < n; i++) { graph.add(new ArrayList<>()); } int[] levels = new int[n]; for (int i = 1; i < n; i++) { levels[i] = sc.nextInt(); int x = sc.nextInt() - 1; graph.get(x).add(i); } int[] needs = new int[n]; int[] tmp = new int[n]; Arrays.fill(needs, -1); Arrays.fill(tmp, Integer.MAX_VALUE); ArrayDeque<Path> queue = new ArrayDeque<>(); queue.add(new Path(0, 0)); while (queue.size() > 0) { Path p = queue.poll(); p.value = Math.max(p.value, levels[p.idx]); needs[p.idx] = p.value; tmp[p.idx] = p.value; for (int x : graph.get(p.idx)) { queue.add(new Path(x, p.value)); } } TreeMap<Integer, Integer> counts = new TreeMap<>(); Arrays.sort(tmp); for (int i = 0; i < n; i++) { counts.put(tmp[i], i + 1); } int q = sc.nextInt(); StringBuilder sb = new StringBuilder(); while (q-- > 0) { int type = sc.nextInt(); int v = sc.nextInt(); if (type == 1) { sb.append(counts.floorEntry(v).getValue()).append("\n"); } else { sb.append(needs[v - 1]).append("\n"); } } System.out.print(sb); } static class Path { int idx; int value; public Path(int idx, int value) { this.idx = idx; this.value = value; } } } 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(); } }