結果
| 問題 |
No.1718 Random Squirrel
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2021-10-28 10:00:30 |
| 言語 | Java (openjdk 23) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,683 bytes |
| コンパイル時間 | 3,214 ms |
| コンパイル使用メモリ | 80,720 KB |
| 実行使用メモリ | 112,304 KB |
| 最終ジャッジ日時 | 2024-10-07 07:56:47 |
| 合計ジャッジ時間 | 21,397 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 29 WA * 2 |
ソースコード
import java.io.*;
import java.util.*;
public class Main {
static ArrayList<ArrayList<Integer>> graph = new ArrayList<>();
static ArrayList<ArrayList<Integer>> part = new ArrayList<>();
static int[] counts;
static int k;
static int base;
static int total = 0;
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
k = sc.nextInt();
counts = new int[n];
for (int i = 0; i < n; i++) {
graph.add(new ArrayList<>());
part.add(new ArrayList<>());
}
for (int i = 0; i < n - 1; i++) {
int a = sc.nextInt() - 1;
int b = sc.nextInt() - 1;
graph.get(a).add(b);
graph.get(b).add(a);
}
for (int i = 0; i < k; i++) {
counts[sc.nextInt() - 1] = 1;
}
getCount(0, 0);
PriorityQueue<Path> queue = new PriorityQueue<>();
int[] costsA = new int[n];
queue.add(new Path(base, 0));
doBTS(queue, costsA);
int maxA = 0;
int maxAIdx = 0;
for (int i = 0; i < n; i++) {
if (costsA[i] < Integer.MAX_VALUE && maxA < costsA[i]) {
maxA = costsA[i];
maxAIdx = i;
}
}
int[] costsB = new int[n];
queue.add(new Path(maxAIdx, 0));
doBTS(queue, costsB);
int maxB = 0;
int maxBIdx = 0;
for (int i = 0; i < n; i++) {
if (costsB[i] < Integer.MAX_VALUE && maxB < costsB[i]) {
maxB = costsB[i];
maxBIdx = i;
}
}
int[] costsC = new int[n];
queue.add(new Path(maxBIdx, 0));
doBTS(queue, costsC);
int maxC = 0;
int maxCIdx = 0;
for (int i = 0; i < n; i++) {
if (costsC[i] < Integer.MAX_VALUE && maxC < costsC[i]) {
maxC = costsC[i];
maxCIdx = i;
}
}
for (int i = 0; i < n; i++) {
if (costsA[i] == Integer.MAX_VALUE) {
continue;
}
queue.add(new Path(i, total * 2 - Math.max(costsB[i], costsC[i])));
}
int[] ans = new int[n];
Arrays.fill(ans, Integer.MAX_VALUE);
while (queue.size() > 0) {
Path p = queue.poll();
if (ans[p.idx] <= p.value) {
continue;
}
ans[p.idx] = p.value;
for (int x : graph.get(p.idx)) {
queue.add(new Path(x, p.value + 1));
}
}
StringBuilder sb = new StringBuilder();
for (int x : ans) {
sb.append(x).append("\n");
}
System.out.print(sb);
}
static int getCount(int idx, int p) {
if (counts[idx] == 1) {
base = idx;
}
for (int x : graph.get(idx)) {
if (x == p) {
continue;
}
int tmp = getCount(x, idx);
if (tmp > 0 && tmp < k) {
part.get(idx).add(x);
part.get(x).add(idx);
total++;
}
counts[idx] += tmp;
}
return counts[idx];
}
static void doBTS(PriorityQueue<Path> queue, int[] costs) {
Arrays.fill(costs, Integer.MAX_VALUE);
while (queue.size() > 0) {
Path p = queue.poll();
if (costs[p.idx] <= p.value) {
continue;
}
costs[p.idx] = p.value;
for (int x : part.get(p.idx)) {
queue.add(new Path(x, p.value + 1));
}
}
}
static class Path implements Comparable<Path> {
int idx;
int value;
public Path(int idx, int value) {
this.idx = idx;
this.value = value;
}
public int compareTo(Path another) {
return value - another.value;
}
}
}
class Scanner {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer("");
public Scanner() throws Exception {
}
public int nextInt() throws Exception {
return Integer.parseInt(next());
}
public long nextLong() throws Exception {
return Long.parseLong(next());
}
public String nextLine() throws Exception {
return br.readLine();
}
public String next() throws Exception {
if (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
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