結果

問題 No.875 Range Mindex Query
コンテスト
ユーザー hiromi_ayase
提出日時 2019-09-06 21:25:52
言語 Java
(openjdk 23)
結果
AC  
実行時間 627 ms / 2,000 ms
コード長 5,094 bytes
コンパイル時間 2,615 ms
コンパイル使用メモリ 90,788 KB
実行使用メモリ 51,988 KB
最終ジャッジ日時 2024-06-24 16:26:35
合計ジャッジ時間 9,574 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 1
other AC * 18
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;

class SegmentTreeRMQPos {
  public int M, H, N;
  public int[] st;
  public int[] pos;

  public SegmentTreeRMQPos(int n) {
    N = n;
    M = Integer.highestOneBit(Math.max(N - 1, 1)) << 2;
    H = M >>> 1;
    st = new int[M];
    pos = new int[M];
    for (int i = 0; i < N; i++)
      pos[H + i] = i;
    Arrays.fill(st, 0, M, Integer.MAX_VALUE);
    for (int i = H - 1; i >= 1; i--)
      propagate(i);
  }

  public SegmentTreeRMQPos(int[] a) {
    N = a.length;
    M = Integer.highestOneBit(Math.max(N - 1, 1)) << 2;
    H = M >>> 1;
    st = new int[M];
    pos = new int[M];
    for (int i = 0; i < N; i++) {
      st[H + i] = a[i];
      pos[H + i] = i;
    }
    Arrays.fill(st, H + N, M, Integer.MAX_VALUE);
    for (int i = H - 1; i >= 1; i--)
      propagate(i);
  }

  public void update(int pos, int x) {
    st[H + pos] = x;
    for (int i = (H + pos) >>> 1; i >= 1; i >>>= 1)
      propagate(i);
  }

  private void propagate(int i) {
    if (st[2 * i] <= st[2 * i + 1]) {
      st[i] = st[2 * i];
      pos[i] = pos[2 * i];
    } else {
      st[i] = st[2 * i + 1];
      pos[i] = pos[2 * i + 1];
    }
  }

  public int minpos;
  public int minval;

  public int minx(int l, int r) {
    minval = Integer.MAX_VALUE;
    minpos = -1;
    if (l >= r)
      return minval;
    while (l != 0) {
      int f = l & -l;
      if (l + f > r)
        break;
      int v = st[(H + l) / f];
      if (v < minval) {
        minval = v;
        minpos = pos[(H + l) / f];
      }
      l += f;
    }

    while (l < r) {
      int f = r & -r;
      int v = st[(H + r) / f - 1];
      if (v < minval) {
        minval = v;
        minpos = pos[(H + r) / f - 1];
      }
      r -= f;
    }
    return minval;
  }

  public int min(int l, int r) {
    minpos = -1;
    minval = Integer.MAX_VALUE;
    min(l, r, 0, H, 1);
    return minval;
  }

  private void min(int l, int r, int cl, int cr, int cur) {
    if (l <= cl && cr <= r) {
      if (st[cur] < minval) {
        minval = st[cur];
        minpos = pos[cur];
      }
    } else {
      int mid = cl + cr >>> 1;
      if (cl < r && l < mid)
        min(l, r, cl, mid, 2 * cur);
      if (mid < r && l < cr)
        min(l, r, mid, cr, 2 * cur + 1);
    }
  }
}



public class Main {

  private static void solve() {
    int n = ni();
    int q = ni();
    int[] a = na(n);
    SegmentTreeRMQPos st = new SegmentTreeRMQPos(a);

    for (int i = 0; i < q; i++) {
      int t = ni();
      int l = ni() - 1;
      int r = ni() - 1;
      if (t == 1) {
        int x = st.min(l, l + 1);
        int y = st.min(r, r + 1);
        st.update(l, y);
        st.update(r, x);
      } else {
        st.min(l, r + 1);
        out.println(st.minpos + 1);
      }
    }
  }

  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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