結果
問題 | No.367 ナイトの転身 |
ユーザー |
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提出日時 | 2020-05-12 10:49:27 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 982 ms / 2,000 ms |
コード長 | 2,914 bytes |
コンパイル時間 | 2,548 ms |
コンパイル使用メモリ | 79,536 KB |
実行使用メモリ | 71,488 KB |
最終ジャッジ日時 | 2024-09-13 04:04:16 |
合計ジャッジ時間 | 12,021 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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ファイルパターン | 結果 |
---|---|
other | AC * 27 |
ソースコード
import java.util.*;public class Main {public static void main (String[] args) {Scanner sc = new Scanner(System.in);int h = sc.nextInt();int w = sc.nextInt();char[][] field = new char[h][];int sr = 0;int sx = 0;int gr = 0;int gc = 0;int[][] kCosts = new int[h][w];int[][] bCosts = new int[h][w];for (int i = 0; i < h; i++) {field[i] = sc.next().toCharArray();Arrays.fill(kCosts[i], Integer.MAX_VALUE);Arrays.fill(bCosts[i], Integer.MAX_VALUE);for (int j = 0; j < w; j++) {if (field[i][j] == 'S') {sr = i;sx = j;} else if (field[i][j] == 'G') {gr = i;gc = j;}}}PriorityQueue<Path> queue = new PriorityQueue<>();queue.add(new Path(sr, sx, 0, true));while (queue.size() > 0) {Path p = queue.poll();if (p.row < 0 || p.row >= h || p.col < 0 || p.col >= w) {continue;}if (p.isKnight) {if (kCosts[p.row][p.col] <= p.value) {continue;}kCosts[p.row][p.col] = p.value;} else {if (bCosts[p.row][p.col] <= p.value) {continue;}bCosts[p.row][p.col] = p.value;}if (field[p.row][p.col] == 'R') {p.isKnight ^= true;}if (p.isKnight) {queue.add(new Path(p.row - 2, p.col - 1, p.value + 1, p.isKnight));queue.add(new Path(p.row - 2, p.col + 1, p.value + 1, p.isKnight));queue.add(new Path(p.row + 2, p.col - 1, p.value + 1, p.isKnight));queue.add(new Path(p.row + 2, p.col + 1, p.value + 1, p.isKnight));queue.add(new Path(p.row - 1, p.col - 2, p.value + 1, p.isKnight));queue.add(new Path(p.row - 1, p.col + 2, p.value + 1, p.isKnight));queue.add(new Path(p.row + 1, p.col - 2, p.value + 1, p.isKnight));queue.add(new Path(p.row + 1, p.col + 2, p.value + 1, p.isKnight));} else {queue.add(new Path(p.row - 1, p.col - 1, p.value + 1, p.isKnight));queue.add(new Path(p.row - 1, p.col + 1, p.value + 1, p.isKnight));queue.add(new Path(p.row + 1, p.col - 1, p.value + 1, p.isKnight));queue.add(new Path(p.row + 1, p.col + 1, p.value + 1, p.isKnight));}}int ans = Math.min(kCosts[gr][gc], bCosts[gr][gc]);if (ans == Integer.MAX_VALUE) {System.out.println(-1);} else {System.out.println(ans);}}static class Path implements Comparable<Path> {int row;int col;int value;boolean isKnight;public Path(int row, int col, int value, boolean isKnight) {this.row = row;this.col = col;this.value = value;this.isKnight = isKnight;}public int compareTo(Path another) {return value - another.value;}}}