結果
問題 | No.3 ビットすごろく |
ユーザー |
![]() |
提出日時 | 2023-04-14 08:29:48 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 82 ms / 5,000 ms |
コード長 | 2,724 bytes |
コンパイル時間 | 2,903 ms |
コンパイル使用メモリ | 85,244 KB |
実行使用メモリ | 50,724 KB |
最終ジャッジ日時 | 2024-10-10 01:56:41 |
合計ジャッジ時間 | 6,477 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
other | AC * 33 |
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[] costs = new int[n + 1];Arrays.fill(costs, Integer.MAX_VALUE);PriorityQueue<Path> queue = new PriorityQueue<>();queue.add(new Path(1, 1));while (queue.size() > 0) {Path p = queue.poll();if (costs[p.idx] <= p.value) {continue;}costs[p.idx] = p.value;int pop = getPop(p.idx);if (p.idx - pop > 0) {queue.add(new Path(p.idx - pop, p.value + 1));}if (p.idx + pop <= n) {queue.add(new Path(p.idx + pop, p.value + 1));}}if (costs[n] == Integer.MAX_VALUE) {System.out.println(-1);} else {System.out.println(costs[n]);}}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();}}