結果
| 問題 |
No.1577 織姫と彦星2
|
| ユーザー |
tenten
|
| 提出日時 | 2023-01-13 10:57:59 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 484 ms / 2,000 ms |
| コード長 | 3,053 bytes |
| コンパイル時間 | 2,641 ms |
| コンパイル使用メモリ | 86,008 KB |
| 実行使用メモリ | 58,132 KB |
| 最終ジャッジ日時 | 2024-12-24 04:59:38 |
| 合計ジャッジ時間 | 19,603 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 * 5 |
| other | AC * 53 |
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();
ArrayList<ArrayList<Integer>> graph = new ArrayList<>();
int[] values = new int[n + 2];
HashMap<Integer, Integer> places = new HashMap<>();
for (int i = 0; i < n + 2; i++) {
values[i] = sc.nextInt();
places.put(values[i], i);
graph.add(new ArrayList<>());
}
for (int i = 0; i < n + 2; i++) {
for (int j = 0; j <= 30; j++) {
if (places.containsKey(values[i] ^ (1 << j))) {
int idx = places.get(values[i] ^ (1 << j));
graph.get(i).add(idx);
}
}
}
PriorityQueue<Path> queue = new PriorityQueue<>();
queue.add(new Path(0, 0));
int[] costs = new int[n + 2];
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 : graph.get(p.idx)) {
queue.add(new Path(x, p.value + 1));
}
}
if (costs[1] == Integer.MAX_VALUE) {
System.out.println(-1);
} else {
System.out.println(costs[1] - 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 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