#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
/*
c = "abxy"
n = 8
abbxyxxb
y = n
x = n
b = n
udah pasti a
abax
*/
string guess_sequence(int n) {
// guess 1st char of s
// sisa question: n + 2 - 2 = n
string s;
int val = press("AB");
if (val == 2) {
s = "A";
} else if (val == 1) {
if (press("A") == 1) {
s = "A";
} else {
s = "B";
}
} else {
if (press("X") == 1) {
s = "X";
} else {
s = "Y";
}
}
// length sisa (n - 1), questions sisa n
vector<string> ch;
if (s[0] != 'A') {
ch.push_back("A");
}
if (s[0] != 'B') {
ch.push_back("B");
}
if (s[0] != 'X') {
ch.push_back("X");
}
if (s[0] != 'Y') {
ch.push_back("Y");
}
for (int i = 2; i <= n - 1; ++i) {
val = press(s + ch[0] + s + ch[1] + ch[0] + s + ch[1] + ch[1] + s + ch[1] + ch[2]);
if (val == i - 1) {
s += ch[2];
} else if (val == i) {
s += ch[0];
} else { // val == i + 1
s += ch[1];
}
}
if (press(s + ch[0]) == n) {
s += ch[0];
} else if (press(s + ch[1]) == n) {
s += ch[1];
} else {
s += ch[2];
}
return s;
}
