Submission #1037025

#	Time	Username	Problem	Language	Result	Execution time	Memory
1037025		JuanJL	Combo (IOI18_combo)	C++17	100 / 100	24 ms	1724 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"

#define SZ(x) (int)x.size()
typedef long long ll;

using namespace std;

std::string guess_sequence(int N) {
  std::string p = "";

  string options = "";
  ll coins = press("AB");

  if(coins>=1){
	coins=press("A");
	if(coins==1) options = "BXY", p+="A";
	else options = "AXY", p+="B";
  }else{
	coins = press("X");
	if(coins==1) options = "ABY",p+="X";
	else options = "ABX",p+="Y";
  }

  //cout<<p<<'\n';

  string aux = "";
  for(int i = 1; i < N-1; i++){
  	aux=p+options[0]+options[0];
  	aux+=p+options[0]+options[1];
  	aux+=p+options[0]+options[2];
  	aux+=p+options[1];
  	//cout<<aux<<"   ";
	coins = press(aux);
	if(coins==SZ(p)+2) p+=options[0];
	else if(coins==SZ(p)+1) p+=options[1];
	else p+=options[2];
	//cout<<p<<'\n';
  }

  if(N==1) return p;

  aux=p+options[0];
  coins=press(aux);
  if(coins>=SZ(p)+1) p+=options[0];
  else{ 
  	aux=p+options[1];
  	coins=press(aux);
  	if(coins>=SZ(p)+1) p+=options[1];
  	else p+=options[2];
  }
  //cout<<p<<'\n';
  return p;
}

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