結果
問題 | No.2100 [Cherry Alpha C] Two-way Steps |
ユーザー | tenten |
提出日時 | 2023-03-02 17:24:01 |
言語 | Java21 (openjdk 21) |
結果 |
TLE
|
実行時間 | - |
コード長 | 4,894 bytes |
コンパイル時間 | 3,055 ms |
コンパイル使用メモリ | 98,124 KB |
実行使用メモリ | 64,840 KB |
最終ジャッジ日時 | 2024-09-17 11:43:02 |
合計ジャッジ時間 | 12,485 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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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 | 57 ms
37,248 KB |
testcase_01 | AC | 56 ms
37,248 KB |
testcase_02 | AC | 56 ms
37,040 KB |
testcase_03 | AC | 54 ms
37,048 KB |
testcase_04 | AC | 621 ms
64,696 KB |
testcase_05 | AC | 531 ms
60,088 KB |
testcase_06 | AC | 225 ms
47,700 KB |
testcase_07 | AC | 243 ms
49,116 KB |
testcase_08 | AC | 624 ms
64,840 KB |
testcase_09 | AC | 498 ms
55,848 KB |
testcase_10 | TLE | - |
testcase_11 | -- | - |
testcase_12 | -- | - |
testcase_13 | -- | - |
testcase_14 | -- | - |
testcase_15 | -- | - |
testcase_16 | -- | - |
testcase_17 | -- | - |
testcase_18 | -- | - |
testcase_19 | -- | - |
testcase_20 | -- | - |
testcase_21 | -- | - |
testcase_22 | -- | - |
testcase_23 | -- | - |
testcase_24 | -- | - |
testcase_25 | -- | - |
testcase_26 | -- | - |
testcase_27 | -- | - |
testcase_28 | -- | - |
testcase_29 | -- | - |
testcase_30 | -- | - |
testcase_31 | -- | - |
testcase_32 | -- | - |
testcase_33 | -- | - |
testcase_34 | -- | - |
testcase_35 | -- | - |
testcase_36 | -- | - |
testcase_37 | -- | - |
testcase_38 | -- | - |
testcase_39 | -- | - |
testcase_40 | -- | - |
testcase_41 | -- | - |
testcase_42 | -- | - |
testcase_43 | -- | - |
testcase_44 | -- | - |
testcase_45 | -- | - |
testcase_46 | -- | - |
testcase_47 | -- | - |
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[] heights = new int[n]; ArrayList<ArrayList<Integer>> graph = new ArrayList<>(); ArrayList<ArrayList<Integer>> reverse = new ArrayList<>(); for (int i = 0; i < n; i++) { heights[i] = sc.nextInt(); graph.add(new ArrayList<>()); reverse.add(new ArrayList<>()); } for (int i = 0; i < m; i++) { int a = sc.nextInt() - 1; int b = sc.nextInt() - 1; graph.get(a).add(b); reverse.get(b).add(a); } PriorityQueue<Path> queue = new PriorityQueue<>(); queue.add(new Path(0, 0, 0)); long[][] lefts = new long[2][n]; Arrays.fill(lefts[0], Long.MIN_VALUE); Arrays.fill(lefts[1], Long.MIN_VALUE); while (queue.size() > 0) { Path p = queue.poll(); if (lefts[p.type][p.idx] >= p.value) { continue; } lefts[p.type][p.idx] = p.value; for (int x : graph.get(p.idx)) { int nType; long nValue; if (heights[p.idx] < heights[x]) { if (p.type == 1) { continue; } nType = 1; nValue = p.value + heights[x] - heights[p.idx]; } else { nType = 0; nValue = p.value; } queue.add(new Path(x, nType, nValue)); } } if (lefts[0][n - 1] == Long.MIN_VALUE && lefts[1][n - 1] == Long.MIN_VALUE) { System.out.println(-1); } else { System.out.println(Math.max(lefts[0][n - 1], lefts[1][n - 1])); } queue.add(new Path(n - 1, 0, 0)); long[][] rights = new long[2][n]; Arrays.fill(rights[0], Long.MIN_VALUE); Arrays.fill(rights[1], Long.MIN_VALUE); while (queue.size() > 0) { Path p = queue.poll(); if (rights[p.type][p.idx] >= p.value) { continue; } rights[p.type][p.idx] = p.value; for (int x : reverse.get(p.idx)) { int nType; long nValue; if (heights[p.idx] < heights[x]) { if (p.type == 1) { continue; } nType = 1; nValue = p.value + heights[x] - heights[p.idx]; } else { nType = 0; nValue = p.value; } queue.add(new Path(x, nType, nValue)); } } if (rights[0][0] == Long.MIN_VALUE && rights[1][0] == Long.MIN_VALUE) { System.out.println(-1); } else { System.out.println(Math.max(rights[0][0], rights[1][0])); } } static class Path implements Comparable<Path> { int idx; int type; long value; public Path(int idx, int type, long value) { this.idx = idx; this.type = type; this.value = value; } public int compareTo(Path another) { if (value == another.value) { return 0; } else if (value < another.value) { return 1; } else { return -1; } } } } 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(); } }