結果
| 問題 |
No.2277 Honest or Dishonest ?
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-07-26 19:05:30 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 302 ms / 2,000 ms |
| コード長 | 3,462 bytes |
| コンパイル時間 | 3,147 ms |
| コンパイル使用メモリ | 91,820 KB |
| 実行使用メモリ | 59,968 KB |
| 最終ジャッジ日時 | 2024-10-03 05:41:43 |
| 合計ジャッジ時間 | 16,550 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 * 3 |
| other | AC * 50 |
ソースコード
import java.io.*;
import java.util.*;
import java.util.stream.*;
public class Main {
static final int MOD = 998244353;
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
int q = sc.nextInt();
UnionFindTree uft = new UnionFindTree(n);
while (q-- > 0) {
int a = sc.nextInt() - 1;
int b = sc.nextInt() - 1;
int c = sc.nextInt();
if (uft.same(a, b)) {
if ((uft.getCount(a) + uft.getCount(b)) % 2 != c) {
System.out.println(0);
return;
}
} else {
uft.unite(a, b, c);
}
}
HashSet<Integer> counts = new HashSet<>();
for (int i = 0; i < n; i++) {
counts.add(uft.find(i));
}
System.out.println(pow(2, counts.size()));
}
static long pow(long x, int p) {
if (p == 0) {
return 1;
} else if (p % 2 == 0) {
return pow(x * x % MOD, p / 2);
} else {
return pow(x, p - 1) * x % MOD;
}
}
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;
}
}
public int find(int x) {
if (x == parents[x]) {
return x;
} else {
int p = find(parents[x]);
counts[x] += counts[parents[x]];
return parents[x] = p;
}
}
public boolean same(int x, int y) {
return find(x) == find(y);
}
public int getCount(int x) {
find(x);
return counts[x];
}
public void unite(int x, int y, int v) {
int xx = find(x);
int yy = find(y);
if ((getCount(x) + getCount(y)) % 2 != v) {
counts[xx] = 1;
}
parents[xx] = yy;
}
}
}
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