結果
問題 | No.1420 国勢調査 (Easy) |
ユーザー |
![]() |
提出日時 | 2023-07-12 10:17:37 |
言語 | Java (openjdk 23) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,116 bytes |
コンパイル時間 | 2,710 ms |
コンパイル使用メモリ | 86,348 KB |
実行使用メモリ | 63,756 KB |
最終ジャッジ日時 | 2024-09-14 00:22:47 |
合計ジャッジ時間 | 16,258 ms |
ジャッジサーバーID (参考情報) |
judge6 / judge5 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 7 WA * 15 RE * 8 |
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 m = sc.nextInt();UnionFindTree uft = new UnionFindTree(n);for (int i = 0; i < n; i++) {int left = sc.nextInt() - 1;int right = sc.nextInt() - 1;int value = sc.nextInt();if (uft.same(left, right)) {if ((uft.getValue(left) ^ uft.getValue(right)) != value) {System.out.println(-1);return;}} else {uft.unite(left, right, value);}}System.out.println(String.join("\n", Arrays.stream(uft.values).mapToObj(String::valueOf).toArray(String[]::new)));}static class UnionFindTree {int[] parents;int[] values;public UnionFindTree(int size) {parents = new int[size];values = 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]);values[x] ^= values[parents[x]];return parents[x] = p;}}public boolean same(int x, int y) {return find(x) == find(y);}public void unite(int x, int y, int v) {int xx = find(x);int yy = find(y);parents[yy] = xx;values[yy] ^= values[x] ^ values[y] ^ v;}public int getValue(int x) {find(x);return values[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();}}