Submission #258735

#	Time	Username	Problem	Language	Result	Execution time	Memory
258735		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" << endl;
      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 << endl;
          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 << endl;
          int rez;
          cin >> rez;
          lastask += now;
          bio[lastask]=true;
          if(rez==0)
          {
            ans += (1LL<<i);
          }
          continue;
        }
      }
      cout << "= " << ans+1;
      return 0;
    }

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