結果
| 問題 |
No.1293 2種類の道路
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-04-11 19:41:25 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 497 ms / 2,000 ms |
| コード長 | 3,456 bytes |
| コンパイル時間 | 3,053 ms |
| コンパイル使用メモリ | 98,448 KB |
| 実行使用メモリ | 86,648 KB |
| 最終ジャッジ日時 | 2024-10-07 13:57:20 |
| 合計ジャッジ時間 | 11,914 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 22 |
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 d = sc.nextInt();
int w = sc.nextInt();
UnionFindTree drive = new UnionFindTree(n);
for (int i = 0; i < d; i++) {
drive.unite(sc.nextInt() - 1, sc.nextInt() - 1);
}
UnionFindTree walk = new UnionFindTree(n);
for (int i = 0; i < w; i++) {
walk.unite(sc.nextInt() - 1, sc.nextInt() - 1);
}
HashMap<Integer, HashSet<Integer>> bridge = new HashMap<>();
for (int i = 0; i < n; i++) {
int x = drive.find(i);
if (!bridge.containsKey(x)) {
bridge.put(x, new HashSet<>());
}
bridge.get(x).add(walk.find(i));
}
HashMap<Integer, Integer> counts = new HashMap<>();
long ans = 0;
for (int x : bridge.keySet()) {
long count = 0;
for (int y : bridge.get(x)) {
count += walk.getCount(y);
}
ans += (count - 1) * drive.getCount(x);
}
System.out.println(ans);
}
static class UnionFindTree {
int[] parents;
int[] counts;
public UnionFindTree(int size) {
parents = new int[size];
counts = new int[size];
for (int i = 0; i < size; i++) {
parents[i] = i;
counts[i] = 1;
}
}
public int find(int x) {
if (x == parents[x]) {
return x;
} else {
return parents[x] = find(parents[x]);
}
}
public boolean same(int x, int y) {
return find(x) == find(y);
}
public void unite(int x, int y) {
int xx = find(x);
int yy = find(y);
if (xx == yy) {
return;
}
parents[xx] = yy;
counts[yy] += counts[xx];
}
public int getCount(int x) {
return counts[find(x)];
}
}
}
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