結果

問題 No.1115 二つの数列 / Two Sequences
ユーザー hiromi_ayasehiromi_ayase
提出日時 2020-07-18 02:45:56
言語 Java21
(openjdk 21)
結果
AC  
実行時間 423 ms / 2,000 ms
コード長 3,325 bytes
コンパイル時間 2,823 ms
コンパイル使用メモリ 83,540 KB
実行使用メモリ 58,784 KB
最終ジャッジ日時 2024-05-07 22:41:03
合計ジャッジ時間 12,022 ms
ジャッジサーバーID
(参考情報)
judge1 / judge3
このコードへのチャレンジ
(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 156 ms
43,940 KB
testcase_01 AC 71 ms
38,056 KB
testcase_02 AC 73 ms
38,332 KB
testcase_03 AC 361 ms
55,084 KB
testcase_04 AC 421 ms
58,784 KB
testcase_05 AC 386 ms
55,040 KB
testcase_06 AC 373 ms
52,052 KB
testcase_07 AC 404 ms
56,900 KB
testcase_08 AC 135 ms
42,232 KB
testcase_09 AC 283 ms
48,828 KB
testcase_10 AC 377 ms
55,780 KB
testcase_11 AC 69 ms
38,608 KB
testcase_12 AC 408 ms
56,696 KB
testcase_13 AC 423 ms
57,348 KB
testcase_14 AC 417 ms
56,800 KB
testcase_15 AC 69 ms
38,328 KB
testcase_16 AC 70 ms
38,488 KB
testcase_17 AC 69 ms
38,488 KB
testcase_18 AC 74 ms
38,056 KB
testcase_19 AC 76 ms
38,320 KB
testcase_20 AC 70 ms
38,452 KB
testcase_21 AC 70 ms
38,376 KB
testcase_22 AC 71 ms
38,416 KB
testcase_23 AC 151 ms
44,084 KB
testcase_24 AC 268 ms
49,216 KB
testcase_25 AC 348 ms
53,248 KB
testcase_26 AC 184 ms
46,144 KB
testcase_27 AC 287 ms
47,900 KB
testcase_28 AC 307 ms
48,856 KB
testcase_29 AC 336 ms
51,868 KB
testcase_30 AC 384 ms
55,980 KB
testcase_31 AC 206 ms
47,440 KB
testcase_32 AC 173 ms
47,076 KB
testcase_33 AC 356 ms
54,656 KB
testcase_34 AC 71 ms
38,144 KB
testcase_35 AC 70 ms
38,056 KB
testcase_36 AC 70 ms
38,200 KB
testcase_37 AC 71 ms
38,180 KB
testcase_38 AC 71 ms
38,048 KB
testcase_39 AC 70 ms
38,544 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

public class Main {

  private static void solve() {
    int n = ni();
    int[] a = na(n);
    int[] b = na(n);

    Map<Integer, Integer> map = new HashMap<>();
    for (int i = 0; i < n; i++) {
      map.put(b[i], i);
    }
    for (int i = 0; i < n; i++) {
      a[i] = map.get(a[i]);
    }
    System.out.println(bubbleCount(a, 0, n));
  }

  public static long bubbleCount(int[] a, int l, int r) {
    if (r - l <= 1)
      return 0;
    int m = (l + r) / 2;
    long ret = bubbleCount(a, l, m) + bubbleCount(a, m, r);
    int[] temp = Arrays.copyOfRange(a, l, r);
    for (int p0 = 0, p1 = m - l, p = l; p < r;) {
      if (p0 == m - l) {
        a[p++] = temp[p1++];
      } else if (p1 == r - l) {
        a[p++] = temp[p0++];
      } else if (temp[p0] <= temp[p1]) {
        a[p++] = temp[p0++];
      } else {
        a[p++] = temp[p1++];
        ret += m - l - p0;
      }
    }
    return ret;
  }

  public static void main(String[] args) {
    new Thread(null, new Runnable() {
      @Override
      public void run() {
        long start = System.currentTimeMillis();
        String debug = args.length > 0 ? args[0] : null;
        if (debug != null) {
          try {
            is = java.nio.file.Files.newInputStream(java.nio.file.Paths.get(debug));
          } catch (Exception e) {
            throw new RuntimeException(e);
          }
        }
        reader = new java.io.BufferedReader(new java.io.InputStreamReader(is), 32768);
        solve();
        out.flush();
        tr((System.currentTimeMillis() - start) + "ms");
      }
    }, "", 64000000).start();
  }

  private static java.io.InputStream is = System.in;
  private static java.io.PrintWriter out = new java.io.PrintWriter(System.out);
  private static java.util.StringTokenizer tokenizer = null;
  private static java.io.BufferedReader reader;

  public static String next() {
    while (tokenizer == null || !tokenizer.hasMoreTokens()) {
      try {
        tokenizer = new java.util.StringTokenizer(reader.readLine());
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }
    return tokenizer.nextToken();
  }

  private static double nd() {
    return Double.parseDouble(next());
  }

  private static long nl() {
    return Long.parseLong(next());
  }

  private static int[] na(int n) {
    int[] a = new int[n];
    for (int i = 0; i < n; i++)
      a[i] = ni();
    return a;
  }

  private static char[] ns() {
    return next().toCharArray();
  }

  private static long[] nal(int n) {
    long[] a = new long[n];
    for (int i = 0; i < n; i++)
      a[i] = nl();
    return a;
  }

  private static int[][] ntable(int n, int m) {
    int[][] table = new int[n][m];
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < m; j++) {
        table[i][j] = ni();
      }
    }
    return table;
  }

  private static int[][] nlist(int n, int m) {
    int[][] table = new int[m][n];
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < m; j++) {
        table[j][i] = ni();
      }
    }
    return table;
  }

  private static int ni() {
    return Integer.parseInt(next());
  }

  private static void tr(Object... o) {
    if (is != System.in)
      System.out.println(java.util.Arrays.deepToString(o));
  }
}
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