Submission #1076720

#	Time	Username	Problem	Language	Result	Execution time	Memory
1076720		Boas	Rarest Insects (IOI22_insects)	C++17	40.97 / 100	196 ms	6140 KiB

insects

#include "insects.h"

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

#define pb push_back
#define loop(x, i) for (int i = 0; i < x; i++)
#define rev(x, i) for (int i = (int)x - 1; i >= 0; i--)
#define ALL(x) begin(x), end(x)
#define sz(x) (int)x.size()

typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef vector<bool> vb;
typedef vector<int> vi;
typedef vector<vi> vvi;

int min_cardinality(int N)
{
  vi ix(N);
  iota(ALL(ix), 0);
  std::random_device rd;
  std::mt19937 g(rd());
  std::shuffle(ix.begin(), ix.end(), g);
  vvi S(N);
  int iter = 1;
  S[0].pb(0);
  move_inside(ix[0]);
  for (int i = 1; i < N; i++)
  {
    move_inside(ix[i]);
    int res = press_button();
    if (res == 2)
    {
      move_outside(ix[i]);
      S[1].pb(i);
    }
    else
      S[0].pb(i);
  }
  int t = sz(S[0]);
  if (t == 1)
    return N;
  while (sz(S[iter]))
  {
    if (sz(S[iter]) < t)
      return iter;
    int curSize = 1;
    for (int i : S[iter - 1])
      move_outside(ix[i]);
    move_inside(ix[S[iter][0]]);
    vi newCurS = {S[iter][0]};
    for (int s_ix = 1; s_ix < sz(S[iter]); s_ix++)
    {
      int i = S[iter][s_ix];
      move_inside(ix[i]);
      int res = press_button();
      if (res == 2)
      {
        move_outside(ix[i]);
        S[iter + 1].pb(i);
      }
      else
      {
        curSize++;
        newCurS.pb(i);
      }
      if (curSize == t)
      {
        for (int s_ix2 = s_ix + 1; s_ix2 < sz(S[iter]); s_ix2++)
        {
          int i2 = S[iter][s_ix2];
          S[iter + 1].pb(i2);
        }
        break;
      }
    }
    if (curSize < t)
      return iter;
    S[iter] = newCurS;
    iter++;
  }
  return iter;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 15.97 / 75