結果
| 問題 |
No.1576 織姫と彦星
|
| ユーザー |
tenten
|
| 提出日時 | 2023-02-21 09:33:18 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 114 ms / 2,000 ms |
| コード長 | 3,106 bytes |
| コンパイル時間 | 5,764 ms |
| コンパイル使用メモリ | 84,264 KB |
| 実行使用メモリ | 39,464 KB |
| 最終ジャッジ日時 | 2024-07-21 22:31:21 |
| 合計ジャッジ時間 | 11,912 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 5 |
| other | AC * 54 |
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[] values = new int[n + 2];
ArrayList<ArrayList<Integer>> graph = new ArrayList<>();
for (int i = 0; i < n + 2; i++) {
values[i] = sc.nextInt();
graph.add(new ArrayList<>());
}
for (int i = 0; i < n + 2; i++) {
for (int j = i + 1; j < n + 2; j++) {
if (getPop(values[i] ^ values[j]) <= 1) {
graph.get(i).add(j);
graph.get(j).add(i);
}
}
}
PriorityQueue<Path> queue = new PriorityQueue<>();
int[] costs = new int[n + 2];
Arrays.fill(costs, Integer.MAX_VALUE);
queue.add(new Path(0, 0));
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 int getPop(int x) {
int pop = 0;
while (x > 0) {
pop += x % 2;
x >>= 1;
}
return pop;
}
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