結果
| 問題 |
No.1817 Reversed Edges
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-03-28 09:01:20 |
| 言語 | Java (openjdk 23) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,893 bytes |
| コンパイル時間 | 3,805 ms |
| コンパイル使用メモリ | 96,080 KB |
| 実行使用メモリ | 94,028 KB |
| 最終ジャッジ日時 | 2024-09-20 00:28:02 |
| 合計ジャッジ時間 | 15,552 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 4 WA * 19 |
ソースコード
import java.io.*;
import java.util.*;
import java.util.stream.*;
public class Main {
static int n;
static ArrayList<ArrayList<Integer>> graph = new ArrayList<>();
static int[] counts;
static int[] reverses;
static int[] ans;
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
for (int i = 0; i < n; i++) {
graph.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);
}
counts = new int[n];
reverses = new int[n];
getCount(0, 0);
ans = new int[n];
setAns(0, 0, 0);
System.out.println(String.join("\n", Arrays.stream(ans).mapToObj(String::valueOf).toArray(String[]::new)));
}
static int getCount(int idx, int p) {
counts[idx] = 1;
for (int x : graph.get(idx)) {
if (x == p) {
continue;
}
if (x < idx) {
reverses[idx]++;
}
counts[idx] += getCount(x, idx);
reverses[idx] += reverses[x];
}
return counts[idx];
}
static void setAns(int idx, int p, int r) {
ans[idx] = r + reverses[idx];
for (int x : graph.get(idx)) {
if (x == p) {
continue;
}
int next = r + reverses[idx] - reverses[x];
if (x > idx) {
next++;
}
setAns(x, idx, next);
}
}
}
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();
}
}
tenten