Submission #239407

#	Time	Username	Problem	Language	Result	Execution time	Memory
239407		ctziapo	Combo (IOI18_combo)	C++14	5 / 100	1 ms	200 KiB

combo

#include "combo.h"
using namespace std;

std::string guess_sequence(int N) {
  std::string p = "";
  string s;
  string s1;
  string s2;
  string s3;

  int t=press("AB");

  if(t!=0){
    int t2=press("A");
    if(t2==1){
        s="A";
        s1="B";
        s2="X";
        s3="Y";
    }
    else{
        s="B";
        s1="A";
        s2="X";
        s3="Y";
    }
  }
  else
  {
    int t2=press("X");
    if(t2==1){
        s="X";
        s1="B";
        s2="Y";
        s3="A";
    }
    else{
        s="Y";
        s1="B";
        s2="X";
        s3="A";
    }
  }

//  cout<<"first letter is "<<s<<endl;

  int cou=1;
  string ans;
  ans=s;
  for(int i=1;i<N-1;i++){
//   cout<<ans<<" "<<ans.size()<<endl;
    string f;
    f=ans + s1 + ans + s2 + s1 + ans + s2 + s2 + ans + s2 + s3;
    int t=press(f);

//    cout<<f<<" "<<t<<" "<<f.size()<<"/"<<N<<endl;
//    cout<<endl;
    if(t==cou+1){
        cou++;
        ans=ans+s1;
    }
    else
    if(t==cou+2){
        cou++;
        ans=ans + s2;
    }
    else
    {
        cou++;
        ans=ans + s3;
    }

  }
//  cout<<"answeeer "<<ans<<endl;

  if(press(ans + s1)==N){
    ans = ans + s1;
  }
  else
    if(press(ans + s2)==N){
    ans = ans + s2;
  }
  else
    ans = ans + s3;
  return ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95