Submission #340111

#	Time	Username	Problem	Language	Result	Execution time	Memory
340111		MilosMilutinovic	Secret (JOI14_secret)	C++14	100 / 100	764 ms	4588 KiB

secret

/**
 *  author: milos
 *  created: 26.12.2020 00:20:30
**/
#include "secret.h"
#include <bits/stdc++.h>

using namespace std;

vector<int> a;

/*#define MAX_VALUE        1000000000

int Secret(int X, int Y) {
  return (X + 2 * (Y / 2) < MAX_VALUE) ? (X + 2 * (Y / 2)) : MAX_VALUE;  
}*/

vector<pair<int, pair<vector<int>, vector<int>>>> ans;

int Query(int l, int r) {
  for (auto c : ans) {
    if (c.first >= l && c.first <= r) {
      if (r == c.first) {
        int j = c.first - l;
        return c.second.first[j];
      }
      int j = c.first - l, z = r - c.first - 1;
      return Secret(c.second.first[j], c.second.second[z]);
    }
  }
  return 0;  
}

void Solve(int l, int r) {
  if (l > r) {
    return;
  }
  int mid = (l + r) / 2; 
  vector<int> pref, suf;
  int x = a[mid];
  pref.push_back(x);
  for (int i = mid - 1; i >= l; i--) {
    x = Secret(a[i], x);
    pref.push_back(x);  
  }
  if (mid + 1 < (int) a.size()) {
    x = a[mid + 1];
    suf.push_back(x);
    for (int i = mid + 2; i <= r; i++) {
      x = Secret(x, a[i]);
      suf.push_back(x);
    }
  }
  ans.push_back({mid, {pref, suf}});
  Solve(l, mid - 1);
  Solve(mid + 1, r);    
}

void Init(int N, int* A) {
  for (int i = 0; i < N; i++) {
    a.push_back(A[i]);
  }
  Solve(0, N - 1);    
}

• Subtask 1: 100 / 100