結果
| 問題 |
No.2325 Skill Tree
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2024-07-31 10:23:06 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 1,336 ms / 3,000 ms |
| コード長 | 2,802 bytes |
| コンパイル時間 | 2,382 ms |
| コンパイル使用メモリ | 95,420 KB |
| 実行使用メモリ | 97,952 KB |
| 最終ジャッジ日時 | 2024-07-31 10:23:45 |
| 合計ジャッジ時間 | 36,685 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
(要ログイン)
| 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.function.*;
import java.util.stream.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
List<List<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);
}
TreeMap<Integer, Integer> counts = new TreeMap<>();
Deque<Path> deq = new ArrayDeque<>();
deq.add(new Path(0, 1));
boolean[] visited = new boolean[n];
while (deq.size() > 0) {
Path p = deq.poll();
p.value = Math.max(p.value, levels[p.idx]);
levels[p.idx] = p.value;
visited[p.idx] = true;
counts.put(p.value, counts.getOrDefault(p.value, 0) + 1);
for (int x : graph.get(p.idx)) {
deq.add(new Path(x, p.value));
}
}
int current = 0;
for (int x : counts.keySet()) {
current += counts.get(x);
counts.put(x, current);
}
int q = sc.nextInt();
String result = IntStream.range(0, q).mapToObj(i -> {
int type = sc.nextInt();
int x = sc.nextInt();
if (type == 1) {
return counts.floorEntry(x).getValue().toString();
} else {
return visited[x - 1] ? String.valueOf(levels[x - 1]) : "-1";
}
}).collect(Collectors.joining("\n"));
System.out.println(result);
}
static class Path {
int idx;
int value;
public Path(int idx, int value) {
this.idx = idx;
this.value = value;
}
}
}
class Scanner {
BufferedReader br;
StringTokenizer st = new StringTokenizer("");
StringBuilder sb = new StringBuilder();
public Scanner() {
try {
br = new BufferedReader(new InputStreamReader(System.in));
} catch (Exception e) {
}
}
public int nextInt() {
return Integer.parseInt(next());
}
public long nextLong() {
return Long.parseLong(next());
}
public double nextDouble() {
return Double.parseDouble(next());
}
public String next() {
try {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
} catch (Exception e) {
e.printStackTrace();
} finally {
return st.nextToken();
}
}
}
tenten