結果
問題 | No.3 ビットすごろく |
ユーザー | wdkkou |
提出日時 | 2019-08-06 22:57:57 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 84 ms / 5,000 ms |
コード長 | 4,095 bytes |
コンパイル時間 | 2,373 ms |
コンパイル使用メモリ | 79,580 KB |
実行使用メモリ | 50,920 KB |
最終ジャッジ日時 | 2024-07-01 09:27:34 |
合計ジャッジ時間 | 5,836 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
(要ログイン)
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 | 55 ms
50,320 KB |
testcase_01 | AC | 56 ms
49,948 KB |
testcase_02 | AC | 57 ms
50,300 KB |
testcase_03 | AC | 60 ms
50,140 KB |
testcase_04 | AC | 57 ms
49,940 KB |
testcase_05 | AC | 67 ms
50,448 KB |
testcase_06 | AC | 61 ms
50,156 KB |
testcase_07 | AC | 58 ms
50,064 KB |
testcase_08 | AC | 65 ms
50,380 KB |
testcase_09 | AC | 78 ms
50,616 KB |
testcase_10 | AC | 81 ms
50,696 KB |
testcase_11 | AC | 69 ms
50,740 KB |
testcase_12 | AC | 67 ms
49,928 KB |
testcase_13 | AC | 63 ms
50,104 KB |
testcase_14 | AC | 80 ms
50,552 KB |
testcase_15 | AC | 83 ms
50,868 KB |
testcase_16 | AC | 80 ms
50,772 KB |
testcase_17 | AC | 73 ms
50,892 KB |
testcase_18 | AC | 59 ms
50,120 KB |
testcase_19 | AC | 75 ms
50,756 KB |
testcase_20 | AC | 59 ms
50,180 KB |
testcase_21 | AC | 55 ms
50,104 KB |
testcase_22 | AC | 80 ms
50,624 KB |
testcase_23 | AC | 84 ms
50,628 KB |
testcase_24 | AC | 84 ms
50,788 KB |
testcase_25 | AC | 82 ms
50,640 KB |
testcase_26 | AC | 55 ms
50,232 KB |
testcase_27 | AC | 60 ms
50,272 KB |
testcase_28 | AC | 74 ms
50,920 KB |
testcase_29 | AC | 68 ms
50,368 KB |
testcase_30 | AC | 55 ms
50,132 KB |
testcase_31 | AC | 55 ms
50,316 KB |
testcase_32 | AC | 65 ms
49,808 KB |
ソースコード
import java.util.*; import java.io.*; public class Main { public static void main(String[] args) { FastScanner sc = new FastScanner(); int n = sc.nextInt(); int ans = solve(n); if (ans == INF) { System.out.println(-1); return; } System.out.println(ans); } static int INF = 1000000007; public static int solve(int n) { boolean[] v = new boolean[n + 1]; int[] dist = new int[n + 1]; Arrays.fill(dist, INF); dist[1] = 1; v[0] = true; Queue<Integer> que = new LinkedList<>(); que.offer(1); while (!que.isEmpty()) { int num = que.poll(); // System.out.println("num = " + num); if (num == n) { break; } if (v[num]) { continue; } v[num] = true; int next1 = num + bitCnt(num); int next2 = num - bitCnt(num); // System.out.println("next1 = " + next1); // System.out.println("next2 = " + next2); if (next1 > n) { dist[next2] = Math.min(dist[next2], dist[num] + 1); que.offer(next2); } else { dist[next1] = Math.min(dist[next1], dist[num] + 1); dist[next2] = Math.min(dist[next2], dist[num] + 1); que.offer(next1); que.offer(next2); } // System.out.println(Arrays.toString(v)); } // System.out.println(Arrays.toString(dist)); return dist[n]; } public static int bitCnt(int num) { int cnt = 0; for (int bit = 0; bit < 20; bit++) { if ((num & (1 << bit)) >= 1) { cnt++; } } return cnt; } } class FastScanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; private boolean hasNextByte() { if (ptr < buflen) { return true; } else { ptr = 0; try { buflen = in.read(buffer); } catch (IOException e) { e.printStackTrace(); } if (buflen <= 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1; } private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126; } public boolean hasNext() { while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte(); } public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while (isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while (true) { if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; } else if (b == -1 || !isPrintableChar(b)) { return minus ? -n : n; } else { throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { long nl = nextLong(); if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException(); return (int) nl; } public double nextDouble() { return Double.parseDouble(next()); } }