Submission #543095

#	Time	Username	Problem	Language	Result	Execution time	Memory
543095		BERNARB01	Secret (JOI14_secret)	C++17	100 / 100	458 ms	12208 KiB

secret

#include "secret.h"
#include <bits/stdc++.h>

using namespace std;

int n, a[1003], tr[2003][1003];

void build(int x, int l, int r, int rig) {
  if (l == r) {
    tr[x][l] = a[l];
    return;
  }
  int y = (l + r) >> 1;
  int z = x + ((y - l + 1) << 1);
  build(x + 1, l, y, 0);
  build(z, y + 1, r, 1);
  if (rig == -1) {
    return;
  }
  if (rig) {
    tr[x][l] = a[l];
    for (int i = l + 1; i <= r; i++) {
      tr[x][i] = Secret(tr[x][i - 1], a[i]);
    }
  } else {
    tr[x][r] = a[r];
    for (int i = r - 1; i >= l; i--) {
      tr[x][i] = Secret(a[i], tr[x][i + 1]);
    }
  }
}

int get(int x, int l, int r, int ll, int rr) {
  int y = (l + r) >> 1;
  int z = x + ((y - l + 1) << 1);
  if (rr <= y) {
    return get(x + 1, l, y, ll, rr);
  }
  if (ll > y) {
    return get(z, y + 1, r, ll, rr);
  }
  return Secret(tr[x + 1][ll], tr[z][rr]);
}

void Init(int N, int A[]) {
  n = N;
  for (int i = 0; i < n; i++) {
    a[i] = A[i];
  }
  build(0, 0, n - 1, -1);
}

int Query(int l, int r) {
  if (l == r) {
    return a[l];
  }
  return get(0, 0, n - 1, l, r);
}

• Subtask 1: 100 / 100