結果
問題 | No.1995 CHIKA Road |
ユーザー | tenten |
提出日時 | 2022-07-12 10:49:24 |
言語 | Java21 (openjdk 21) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,783 bytes |
コンパイル時間 | 2,250 ms |
コンパイル使用メモリ | 80,036 KB |
実行使用メモリ | 85,480 KB |
最終ジャッジ日時 | 2024-06-23 06:19:37 |
合計ジャッジ時間 | 20,820 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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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 | 44 ms
37,324 KB |
testcase_01 | AC | 45 ms
37,272 KB |
testcase_02 | AC | 44 ms
37,212 KB |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | AC | 406 ms
48,820 KB |
testcase_11 | WA | - |
testcase_12 | AC | 746 ms
68,996 KB |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | WA | - |
testcase_36 | WA | - |
testcase_37 | WA | - |
testcase_38 | WA | - |
testcase_39 | WA | - |
ソースコード
import java.io.*; import java.util.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); int n = sc.nextInt(); int m = sc.nextInt(); int[] lefts = new int[m]; int[] rights = new int[m]; TreeMap<Integer, Integer> compress = new TreeMap<>(); for (int i = 0; i < m; i++) { lefts[i] = sc.nextInt(); compress.put(lefts[i], null); rights[i] = sc.nextInt(); compress.put(rights[i], null); } int idx = 0; for (int x : compress.keySet()) { compress.put(x, idx++); } ArrayList<ArrayList<Integer>> graph = new ArrayList<>(); for (int i = 0; i < idx; i++) { graph.add(new ArrayList<>()); } for (int i = 0; i < m; i++) { graph.get(compress.get(lefts[i])).add(compress.get(rights[i])); } int[] counts = new int[idx + 1]; Arrays.fill(counts, -1); counts[idx] = Integer.MAX_VALUE; PriorityQueue<Path> queue = new PriorityQueue<>(); queue.add(new Path(0, 0)); while (queue.size() > 0) { Path p = queue.poll(); if (counts[p.idx] >= p.value) { continue; } counts[p.idx] = p.value; for (int x : graph.get(p.idx)) { queue.add(new Path(x, p.value + 1)); } if (counts[p.idx + 1] == -1) { queue.add(new Path(p.idx + 1, p.value)); } } System.out.println((n - 1) * 2 - counts[idx - 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) { if (another.value == value) { return idx - another.idx; } else { return another.value - value; } } } } class Scanner { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(""); 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 String next() throws Exception { if (!st.hasMoreTokens()) { st = new StringTokenizer(br.readLine()); } return st.nextToken(); } }