Submission #937046

#	Time	Username	Problem	Language	Result	Execution time	Memory
937046		Yazan_SA	Combo (IOI18_combo)	C++14	100 / 100	13 ms	1732 KiB

combo

#include<bits/stdc++.h>
#include"combo.h"
using namespace std;
std::string guess_sequence(int N)
{
    std::string ans="";
    std::string bts="ABXY";
    int mx=1;
    ans+=(press(ans+bts[0]+bts[1])?press(ans+bts[0])?bts[0]:bts[1]:(press(ans+bts[2])?bts[2]:bts[3]));
    bts.erase(bts.begin()+bts.find(ans[0]));
    while((int)ans.size()!=N)
    {
        //cout<<ans+bts[0]+ans+bts[1]+bts[0]+ans+bts[1]+bts[1]+ans+bts[1]+bts[2]<<endl;
        if((int)ans.size()+1==N){
          if(press(ans+bts[0]+ans+bts[1])>(int)ans.size())
          {
            if(mx!=press(ans+bts[0]))ans+=bts[0];
            else ans+=bts[1];
          }
          else ans+=bts[2];
        }
        else{
          int tm=press(ans+bts[0]+ans+bts[1]+bts[0]+ans+bts[1]+bts[1]+ans+bts[1]+bts[2]);
          if(tm>(int)ans.size())
          {
              if(tm-2==ans.size())ans+=bts[1];
              else ans+=bts[0];
          }
          else ans+=bts[2];
        }
        mx=ans.size();
    }
    return ans;
}
//int main()
//{
//    string s="abcd";
//    s.erase(s.begin()+s.find('a'));
//    cout<<s;
//}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:26:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |               if(tm-2==ans.size())ans+=bts[1];
      |                  ~~~~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95