結果

問題 No.3 ビットすごろく
ユーザー kusomushikusomushi
提出日時 2018-12-18 20:18:43
言語 Java21
(openjdk 21)
結果
AC  
実行時間 546 ms / 5,000 ms
コード長 4,956 bytes
コンパイル時間 3,224 ms
コンパイル使用メモリ 76,816 KB
実行使用メモリ 66,480 KB
最終ジャッジ日時 2023-09-14 01:10:15
合計ジャッジ時間 8,851 ms
ジャッジサーバーID
(参考情報)
judge12 / judge13
このコードへのチャレンジ
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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 43 ms
49,316 KB
testcase_01 AC 44 ms
49,704 KB
testcase_02 AC 44 ms
49,532 KB
testcase_03 AC 59 ms
50,644 KB
testcase_04 AC 48 ms
49,636 KB
testcase_05 AC 90 ms
52,116 KB
testcase_06 AC 60 ms
50,632 KB
testcase_07 AC 57 ms
50,440 KB
testcase_08 AC 87 ms
53,680 KB
testcase_09 AC 139 ms
55,152 KB
testcase_10 AC 209 ms
60,936 KB
testcase_11 AC 121 ms
54,572 KB
testcase_12 AC 86 ms
53,800 KB
testcase_13 AC 59 ms
50,480 KB
testcase_14 AC 191 ms
59,340 KB
testcase_15 AC 419 ms
64,812 KB
testcase_16 AC 239 ms
61,092 KB
testcase_17 AC 391 ms
64,572 KB
testcase_18 AC 59 ms
50,712 KB
testcase_19 AC 546 ms
66,192 KB
testcase_20 AC 49 ms
49,384 KB
testcase_21 AC 44 ms
49,424 KB
testcase_22 AC 189 ms
58,812 KB
testcase_23 AC 525 ms
66,148 KB
testcase_24 AC 534 ms
66,480 KB
testcase_25 AC 427 ms
64,876 KB
testcase_26 AC 44 ms
49,404 KB
testcase_27 AC 60 ms
50,260 KB
testcase_28 AC 231 ms
60,996 KB
testcase_29 AC 121 ms
54,804 KB
testcase_30 AC 45 ms
49,188 KB
testcase_31 AC 45 ms
49,256 KB
testcase_32 AC 110 ms
54,928 KB
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ソースコード

diff #

import java.io.*;
import java.util.*;
import java.util.function.Function;

public class Main {

    static int N;

    public static void main(String[] args) {
        FastScanner sc = new FastScanner(System.in);
        N = sc.nextInt();

        System.out.println(solve());
    }

    static int solve() {
        int[] dist = new int[N+1];
        Arrays.fill(dist, Integer.MAX_VALUE);
        dist[1] = 0;
        ArrayDeque<Integer> q = new ArrayDeque<>();
        q.add(1);
        while( !q.isEmpty() ) {
            int a = q.poll();
            int cnt = Integer.bitCount(a);

            if( a + cnt <= N && dist[a+cnt] >= dist[a] + 1) {
                dist[a+cnt] = dist[a]+1;
                q.add(a+cnt);
            }

            if( a - cnt >= 1 && dist[a-cnt] >= dist[a] + 1) {
                dist[a-cnt] = dist[a]+1;
                q.add(a-cnt);
            }

        }
        if( dist[N] == Integer.MAX_VALUE ) {
            return -1;
        } else {
            return dist[N] + 1;
        }
    }

    @SuppressWarnings("unused")
    static class FastScanner {
        private BufferedReader reader;
        private StringTokenizer tokenizer;

        FastScanner(InputStream in) {
            reader = new BufferedReader(new InputStreamReader(in));
            tokenizer = null;
        }

        String next() {
            if (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        String nextLine() {
            if (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    return reader.readLine();
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken("\n");
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        int[] nextIntArray(int n) {
            int[] a = new int[n];
            for (int i = 0; i < n; i++) a[i] = nextInt();
            return a;
        }

        int[] nextIntArray(int n, int delta) {
            int[] a = new int[n];
            for (int i = 0; i < n; i++) a[i] = nextInt() + delta;
            return a;
        }

        long[] nextLongArray(int n) {
            long[] a = new long[n];
            for (int i = 0; i < n; i++) a[i] = nextLong();
            return a;
        }
    }

    static <A> void writeLines(A[] as, Function<A, String> f) {
        PrintWriter pw = new PrintWriter(System.out);
        for (A a : as) pw.println(f.apply(a));
        pw.flush();
    }

    static void writeLines(int[] as) {
        PrintWriter pw = new PrintWriter(System.out);
        for (int a : as) pw.println(a);
        pw.flush();
    }

    static void writeLines(long[] as) {
        PrintWriter pw = new PrintWriter(System.out);
        for (long a : as) pw.println(a);
        pw.flush();
    }

    static void writeSingleLine(int[] as) {
        PrintWriter pw = new PrintWriter(System.out);
        for (int i = 0; i < as.length; i++) {
            if (i != 0) pw.print(" ");
            pw.print(i);
        }
        pw.println();
        pw.flush();
    }

    static int max(int... as) {
        int max = Integer.MIN_VALUE;
        for (int a : as) max = Math.max(a, max);
        return max;
    }

    static int min(int... as) {
        int min = Integer.MAX_VALUE;
        for (int a : as) min = Math.min(a, min);
        return min;
    }

    static int lowerBound(int[] array, int value) {
        int low = 0;
        int high = array.length;
        int mid;
        while (low < high) {
            mid = ((high - low) >>> 1) + low;
            if (array[mid] < value) low = mid + 1;
            else high = mid;
        }
        return low;
    }

    static int upperBound(long[] array, long value) {
        int low = 0;
        int high = array.length;
        int mid;
        while (low < high) {
            mid = ((high - low) >>> 1) + low;
            if (array[mid] <= value) low = mid + 1;
            else high = mid;
        }
        return low;
    }

    static void debug(Object... args) {
        StringJoiner j = new StringJoiner(" ");
        for (Object arg : args) {
            if (arg instanceof int[]) j.add(Arrays.toString((int[]) arg));
            else if (arg instanceof long[]) j.add(Arrays.toString((long[]) arg));
            else if (arg instanceof double[]) j.add(Arrays.toString((double[]) arg));
            else if (arg instanceof Object[]) j.add(Arrays.toString((Object[]) arg));
            else j.add(arg.toString());
        }
        System.err.println(j.toString());
    }
}
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