結果
問題 | No.1244 Black Segment |
ユーザー | tenten |
提出日時 | 2023-04-11 16:08:13 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 658 ms / 2,000 ms |
コード長 | 3,029 bytes |
コンパイル時間 | 3,591 ms |
コンパイル使用メモリ | 84,832 KB |
実行使用メモリ | 78,248 KB |
最終ジャッジ日時 | 2024-10-07 09:23:49 |
合計ジャッジ時間 | 19,705 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 56 ms
50,224 KB |
testcase_01 | AC | 55 ms
50,460 KB |
testcase_02 | AC | 56 ms
50,372 KB |
testcase_03 | AC | 54 ms
50,192 KB |
testcase_04 | AC | 55 ms
50,432 KB |
testcase_05 | AC | 55 ms
50,120 KB |
testcase_06 | AC | 55 ms
50,428 KB |
testcase_07 | AC | 56 ms
50,644 KB |
testcase_08 | AC | 55 ms
50,452 KB |
testcase_09 | AC | 55 ms
50,452 KB |
testcase_10 | AC | 55 ms
50,040 KB |
testcase_11 | AC | 55 ms
50,504 KB |
testcase_12 | AC | 56 ms
50,448 KB |
testcase_13 | AC | 138 ms
52,272 KB |
testcase_14 | AC | 414 ms
65,324 KB |
testcase_15 | AC | 142 ms
52,604 KB |
testcase_16 | AC | 415 ms
65,216 KB |
testcase_17 | AC | 126 ms
52,240 KB |
testcase_18 | AC | 456 ms
65,092 KB |
testcase_19 | AC | 590 ms
68,408 KB |
testcase_20 | AC | 582 ms
73,236 KB |
testcase_21 | AC | 432 ms
67,096 KB |
testcase_22 | AC | 588 ms
73,556 KB |
testcase_23 | AC | 604 ms
73,472 KB |
testcase_24 | AC | 558 ms
73,520 KB |
testcase_25 | AC | 569 ms
73,576 KB |
testcase_26 | AC | 539 ms
71,428 KB |
testcase_27 | AC | 499 ms
73,372 KB |
testcase_28 | AC | 588 ms
73,708 KB |
testcase_29 | AC | 541 ms
73,852 KB |
testcase_30 | AC | 548 ms
73,700 KB |
testcase_31 | AC | 539 ms
73,800 KB |
testcase_32 | AC | 540 ms
73,152 KB |
testcase_33 | AC | 541 ms
73,796 KB |
testcase_34 | AC | 627 ms
73,492 KB |
testcase_35 | AC | 541 ms
75,596 KB |
testcase_36 | AC | 575 ms
75,504 KB |
testcase_37 | AC | 573 ms
75,408 KB |
testcase_38 | AC | 658 ms
78,248 KB |
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(); int a = sc.nextInt() - 1; int b = sc.nextInt() - 1; ArrayList<ArrayList<Integer>> graph = new ArrayList<>(); for (int i = 0; i < n + 1; i++) { graph.add(new ArrayList<>()); } for (int i = 0; i < m; i++) { int x = sc.nextInt() - 1; int y = sc.nextInt(); graph.get(x).add(y); graph.get(y).add(x); } PriorityQueue<Path> queue = new PriorityQueue<>(); for (int i = 0; i <= a; i++) { queue.add(new Path(i, 0)); } int[] costs = new int[n + 1]; 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)); } } int ans = Integer.MAX_VALUE; for (int i = b + 1; i <= n; i++) { ans = Math.min(ans, costs[i]); } if (ans == Integer.MAX_VALUE) { System.out.println(-1); } else { System.out.println(ans); } } 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(); } }