Submission #1077307

#	Time	Username	Problem	Language	Result	Execution time	Memory
1077307		juicy	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	2 ms	860 KiB

messy

#include "messy.h"

#include <bits/stdc++.h>

int n;
std::string s;
std::vector<int> p;

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

void qry(int l, int r, std::vector<int> cands) {
  if (l == r) {
    p[cands[0]] = l;
    return;
  }
  int md = (l + r) / 2;
  s = std::string(n, '1');
  for (auto p : cands) {
    s[p] = '0';
  }
  std::vector<int> lt, rt;
  for (auto p : cands) {
    s[p] = '1';
    (check_element(s) ? lt : rt).push_back(p);
    s[p] = '0';
  }
  qry(l, md, lt);
  qry(md + 1, r, rt);
}

std::vector<int> restore_permutation(int n, int w, int r) {
  ::n = n;
  dc(0, n - 1);
  compile_set();
  std::vector<int> cands(n); iota(cands.begin(), cands.end(), 0);
  p = std::vector<int>(n);
  qry(0, n - 1, cands);
  return p;
}

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