Submission #958396

#	Time	Username	Problem	Language	Result	Execution time	Memory
958396		AkibAzmain	Mechanical Doll (IOI18_doll)	C++17	53 / 100	94 ms	14668 KiB

doll

#include "doll.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

void create_circuit(int m, std::vector<int> a) {
  int p = 0;
  a.push_back (0);
  vector < vector < int > > adj (m + 1);
  for (auto &x : a) adj[p].push_back (x), p = x;
  vector < int > c (m + 1), x, y;
  x.reserve (a.size () * 2);
  y.reserve (a.size () * 2);
  for (int i = 0; i <= m; ++i)
    {
      if (adj[i].empty ()) continue;
      if (adj[i].size () == 1)
        {
          c[i] = adj[i][0];
          continue;
        }
      int vt = 1, vtt = 0;
      while (vt < adj[i].size ()) vt *= 2, ++vtt;
      vector < int > v (vt, -((int) x.size () + 1));
      for (int j = 0; j < adj[i].size (); ++j)
        {
          int k = vt - adj[i].size () + j, q = 0;
          for (int p = 0; p < vtt; ++p) q = q * 2 + k % 2, k /= 2;
          v[q] = adj[i][j];
        }
      auto f = [&] (auto &self, int l, int r) -> int
      {
        if (l + 1 == r) return v[l];
        int m = (l + r) / 2;
        x.push_back (0), y.push_back (0);
        int i = x.size () - 1;
        x[i] = self (self, l, m);
        y[i] = self (self, m, r);
        return -(i + 1);
      };
      c[i] = f (f, 0, vt);
    }
  answer (c, x, y);
}

Compilation message (stderr)

doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:23:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |       while (vt < adj[i].size ()) vt *= 2, ++vtt;
      |              ~~~^~~~~~~~~~~~~~~~
doll.cpp:25:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |       for (int j = 0; j < adj[i].size (); ++j)
      |                       ~~^~~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 4 / 4
• Subtask 3: 10 / 10
• Subtask 4: 0 / 10
• Subtask 5: 9.0000000036 / 18
• Subtask 6: 28.0000000112 / 56