結果

問題 No.728 ギブ and テイク
ユーザー hiromi_ayasehiromi_ayase
提出日時 2018-08-25 06:52:59
言語 Java21
(openjdk 21)
結果
AC  
実行時間 1,546 ms / 3,000 ms
コード長 3,436 bytes
コンパイル時間 2,394 ms
コンパイル使用メモリ 89,568 KB
実行使用メモリ 104,736 KB
最終ジャッジ日時 2023-09-06 14:58:27
合計ジャッジ時間 20,693 ms
ジャッジサーバーID
(参考情報)
judge14 / judge11
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 69 ms
51,204 KB
testcase_01 AC 69 ms
50,852 KB
testcase_02 AC 71 ms
50,796 KB
testcase_03 AC 69 ms
50,900 KB
testcase_04 AC 70 ms
50,952 KB
testcase_05 AC 70 ms
51,096 KB
testcase_06 AC 70 ms
51,016 KB
testcase_07 AC 70 ms
50,940 KB
testcase_08 AC 80 ms
51,872 KB
testcase_09 AC 71 ms
50,900 KB
testcase_10 AC 75 ms
50,888 KB
testcase_11 AC 86 ms
49,652 KB
testcase_12 AC 91 ms
51,528 KB
testcase_13 AC 280 ms
59,516 KB
testcase_14 AC 351 ms
61,240 KB
testcase_15 AC 236 ms
57,280 KB
testcase_16 AC 335 ms
59,468 KB
testcase_17 AC 345 ms
59,188 KB
testcase_18 AC 1,408 ms
78,916 KB
testcase_19 AC 1,430 ms
88,892 KB
testcase_20 AC 1,493 ms
97,900 KB
testcase_21 AC 1,455 ms
90,996 KB
testcase_22 AC 682 ms
70,500 KB
testcase_23 AC 537 ms
66,240 KB
testcase_24 AC 1,215 ms
77,496 KB
testcase_25 AC 1,146 ms
77,484 KB
testcase_26 AC 667 ms
71,876 KB
testcase_27 AC 1,546 ms
104,736 KB
testcase_28 AC 1,100 ms
104,632 KB
testcase_29 AC 70 ms
50,868 KB
testcase_30 AC 69 ms
51,136 KB
testcase_31 AC 69 ms
50,856 KB
testcase_32 AC 69 ms
51,332 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;

public class Main {


  private static void solve() {
    int n = ni();
    int[] a = na(n);
    int[][] r = ntable(n, 2);
    int[] ft = new int[n + 1];

    int[][] b = new int[n * 2][];
    for (int i = 0; i < n; i ++) {
      b[i * 2 + 0] = new int[] {a[i], i, 0};
      b[i * 2 + 1] = new int[] {a[i] - r[i][0], i, 1};
    }
    Arrays.sort(b, (o1, o2) -> o1[0] == o2[0] ? o2[2] - o1[2] : o1[0] - o2[0]);

    long ret = 0;
    for (int i = 0; i < n * 2; i ++) {
      int j = b[i][1];
      if (b[i][2] == 1) {
        addFenwick(ft, j, 1);
      } else {
        int k = Arrays.binarySearch(a, b[i][0] + r[j][1]);
        if (k < 0) k = -k - 2;
        
        ret += sumFenwick(ft, k) - sumFenwick(ft, j);
      }
    }
    System.out.println(ret);
  }

  public static int sumFenwick(int[] ft, int i)
  {
      int sum = 0;
      for(i++;i > 0;i -= i&-i)sum += ft[i];
      return sum;
  }
  
  public static void addFenwick(int[] ft, int i, int v)
  {
      if(v == 0 || i < 0)return;
      int n = ft.length;
      for(i++;i < n;i += i&-i)ft[i] += v;
  }
  
  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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