#include <iostream>
#include <string>
#include <algorithm>
#include "combo.h"
using namespace std;
string guess_sequence(int n){
string curr = "";
char x[4];
x[0] = 'A'; x[1] = 'B'; x[2] = 'X'; x[3] = 'Y';
if (press("AB") > 0){
if (press("A") > 0)
curr = "A";
else
curr = "B";
}
else{
if (press("X") > 0)
curr = "X";
else
curr = "Y";
}
for (int i = 0; i < 4; i++)
if (x[i] == curr[0])
x[i] = 'Y' + 1;
int t = 1;
sort(x, x + 4);
while(t < n){
if (t == n - 1){
if (press(curr + x[0]) == n)
return curr + x[0];
if (press(curr + x[1]) == n)
return curr + x[1];
return curr + x[2];
}
string s = "";
for (int i = 0; i < 3; i++)
s += (string)((string)(curr + x[0]) + x[i]);
s += (string)((string)(curr + x[1]) + curr[0]);
int res = press(s);
if (res >= 2)
curr += x[0];
else if (res >= 1)
curr += x[1];
else
curr += x[2];
t++;
}
return curr;
}
