Submission #963930

#	Time	Username	Problem	Language	Result	Execution time	Memory
963930		Mardonbekhazratov	Combo (IOI18_combo)	C++17	5 / 100	1 ms	504 KiB

combo

#include "combo.h"
#include<vector>

using namespace std;

string guess_sequence(int n) {
  string p = "";
  if(press("AB")){
    if(press("A")) p+="A";
    else p+="B";
  }
  else{
    if(press("X")) p+="X";
    else p+="Y";
  }
  vector<char>d={'A','B','X','Y'};
  for(int i=0;i<4;i++){
    if(d[i]==p[0]){
      d.erase(d.begin()+i);
    }
  }
  for(int i=2;i<n;i++){
    string f1=p+d[0]+d[0];
    string f2=p+d[0]+d[1];
    string f3=p+d[0]+d[2];
    string f4=p+d[1];
    int x=press(f1+f2+f3+f4);
    if(x==i-1){
      p+=d[2];
    }
    else if(x==i){
      p+=d[1];
    }
    else{
      p+=d[0];
    }
  }
  for(int i=0;i<2;i++){
    string f=p+d[i];
    if(press(f)==n){
      p+=d[i];
      break;
    }
    if(i==1) p+=d[2];
  }
  return p;
}

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