Submission #614409

#	Time	Username	Problem	Language	Result	Execution time	Memory
614409		brucecccccc	Unscrambling a Messy Bug (IOI16_messy)	C++14	38 / 100	2 ms	340 KiB

messy

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

using namespace std;

vector<int> restore_permutation(int n, int w, int r) {
  srand(102938);

  set<int> pos;
  for (int i = 0; i < n; i++) pos.insert(i);
  set<int> k = pos;
  vector<int> val(n);
  string x(n, '0');
  for (int i = 0; i < n; i++) {
    auto g = next(k.begin(), rand() % k.size());
    x[*g] = '1';
    val[i] = *g;
    k.erase(g);
    add_element(x);
  }
  compile_set();
  x = string(n, '0');
  int count = 0;
  vector<int> ans(n);
  for (int i = 0; i < n; i++) {
    set<int> guess = pos;
    while (!guess.empty()) {
      auto g = next(guess.begin(), rand() % guess.size());
      string t = x;
      int ind = *g;
      t[ind] = '1';
      guess.erase(g);
      // cout << t << ' ' << x << endl;
      // count++;
      if (guess.empty() || check_element(t)) {
        ans[ind] = val[i];
        x[ind] = '1';
        pos.erase(ind);
        break;
      }
    }
  }
  // cout << count << endl; 
  
  return ans;
}

Compilation message (stderr)

messy.cpp: In function 'std::vector<int> restore_permutation(int, int, int)':
messy.cpp:23:7: warning: unused variable 'count' [-Wunused-variable]
   23 |   int count = 0;
      |       ^~~~~

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