Submission #163994

#	Time	Username	Problem	Language	Result	Execution time	Memory
163994		WLZ	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	12 ms	636 KiB

messy

#include <bits/stdc++.h>
#include "messy.h"
using namespace std;

vector<int> a;
int n;

void solve(int l, int r, set<int> st) {
  if (l == r) {
    a[l] = *st.begin();
    return;
  }
  string s(n, '0');
  for (int i = 0; i < n; i++) {
    if (!st.count(i)) {
      s[i] = '1';
    }
  }
  set<int> tmp_l, tmp_r;
  for (auto& x : st) {
    s[x] = '1';
    if (check_element(s)) {
      tmp_l.insert(x);
    } else {
      tmp_r.insert(x);
    }
    s[x] = '0';
  }
  solve(l, (l + r) / 2, tmp_l);
  solve((l + r) / 2 + 1, r, tmp_r);
}

vector<int> restore_permutation(int _n, int w, int r) {
  n = _n;
  for (int k = 2; k <= n; k += k) {
    for (int i = 0; i + k - 1 < n; i += k) {
      string s(n, '1');
      for (int j = i; j < i + k; j++) {
        s[j] = '0';
      }
      for (int j = i; j < i + k / 2; j++) {
        s[j] = '1';
        add_element(s);
        s[j] = '0';
      }
    }
  }
  compile_set();
  a.assign(n, -1);
  set<int> st;
  for (int i = 0; i < n; i++) {
    st.insert(i);
  }
  solve(0, n - 1, st);  
  vector<int> ans(n);
  for (int i = 0; i < n; i++) {
    ans[a[i]] = i;
  }
  return ans;
}

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