Submission #258726

#	Time	Username	Problem	Language	Result	Execution time	Memory
258726		sckmd	Colors (BOI20_colors)	C++14	0 / 100	0 ms	256 KiB

Colors

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
map <ll,bool> bio;

int main()
{
  int n;
  cin >> n;
  int mx = 62;
  ll ans = 0LL;
  cout << "? 1\n";
  bio[1]=true;
  ll lastask = 1;
  for(int i = mx; i >= 0; i--)
  {
    ll now = ans + (1LL<<i);
    if(lastask-now > 1 && !bio[lastask-now])
    {
      cout << "? " << lastask-now << "\n";
      int rez;
      cin >> rez;
      if(rez==1)
      {
        bio[lastask-now]=true;
        lastask -= now;
        continue;
      }
      else
      {
        bio[lastask-now]=true;
        ans += (1LL<<i);
        lastask -= now;
        continue;
      }
    }
    if(lastask+now <= n && !bio[lastask+now])
    {
      cout << "? " << lastask+now << "\n";
      int rez;
      cin >> rez;
      lastask += now;
      bio[lastask]=true;
      if(rez==0)
      {
        ans += (1LL<<i);
      }
    }
  }
  cout << ans;
  return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 33