Submission #1247624

#	Time	Username	Problem	Language	Result	Execution time	Memory
1247624		julia_08	Unscrambling a Messy Bug (IOI16_messy)	C++20	38 / 100	2 ms	328 KiB

messy

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

using namespace std;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int MAXN = 128;

int to[MAXN], marc[MAXN];

int n;

string str(int x){

  string s;

  for(int i=0; i<n; i++){
    if(x & (1 << i)){
      s.push_back('1'); 
    } else s.push_back('0');
  }

  reverse(s.begin(), s.end());

  return s;

} 

vector<int> restore_permutation(int n_, int w, int r){

  n = n_;

  for(int i=0; i<n; i++) add_element(str((1 << (i + 1)) - 1));

  compile_set();

  vector<int> ans(n);

  int cur = 0;

  vector<int> v;

  for(int i=0; i<n; i++) v.push_back(i);

  for(int i=0; i<n; i++){

    bool ok = false;

    for(int k=0; k<v.size(); k++){

      int j = v[k];
      if(j != i) continue;

      if(check_element(str(cur ^ (1 << j)))){

        cur ^= (1 << j);
        to[n - 1 - i] = n - 1 - j;
        marc[j] = 1;
          
        swap(v[k], v.back());
        v.pop_back();

        ok = true;
        break; 

      }

    }

    if(ok) continue;

    shuffle(v.begin(), v.end(), rng);

    for(int k=0; k<v.size(); k++){

      int j = v[k];

      if(check_element(str(cur ^ (1 << j)))){

        cur ^= (1 << j);
        to[n - 1 - i] = n - 1 - j;
        marc[j] = 1;
          
        swap(v[k], v.back());
        v.pop_back();

        break; 

      }

    }

  }

  for(int i=0; i<n; i++) ans[to[i]] = i;

  return ans;

}

Compilation message (stderr)

messy.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
messy_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

• Subtask 1: 20 / 20
• Subtask 2: 18 / 18
• Subtask 3: 0 / 11
• Subtask 4: 0 / 21
• Subtask 5: 0 / 30