Submission #23493

#	Time	Username	Problem	Language	Result	Execution time	Memory
23493		ruhanhabib39	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	7 ms	640 KiB

messy

#include <vector>
#include <string>
#include <iostream>

#include "messy.h"

void build(int n, int l, int r) {
  if(l == r) return;
  int m = (l + r) / 2;
  std::string ss(n, '1');
  for(int i = l; i <= r; i++) {
    ss[i] = '0';
  }
  for(int i = l; i <= m; i++) {
    ss[i] = '1';
    add_element(ss);
    ss[i] = '0';
  }
  build(n, l, m); build(n, m+1, r);
}

void work(int n, std::vector<int>& res, std::vector<int> v, int l, int r) {
  // std::cerr << l << " " << r << " " << v.size() << "\n";
  if(l == r) {
    res[v[0]] = l;
    return;
  }
  int m = (l + r) / 2;
  std::string ss(n, '1');
  for(int i : v) {
    ss[i] = '0';
  }
  std::vector<int> lf, rh;
  for(int i : v) {
    ss[i] = '1';
    if(check_element(ss)) lf.push_back(i);
    else rh.push_back(i);
    ss[i] = '0';
  }
  work(n, res, lf, l, m);
  work(n, res, rh, m+1, r);
}

std::vector<int> restore_permutation(int n, int w, int r) {
    build(n, 0, n-1);
    compile_set();
    std::vector<int> res(n, 0);
    std::vector<int> vec(n);
    for(int i = 0; i < n; i++) {
      vec[i] = i;
    }
    work(n, res, vec, 0, n-1);
    return res;
}

• Subtask 1: 20 / 20
• Subtask 2: 18 / 18
• Subtask 3: 11 / 11
• Subtask 4: 21 / 21
• Subtask 5: 30 / 30