#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
string getfnl(string s, int N){
string p = s + 'A' + s + 'B';
if(press(p) == N){
if(press(s + 'A') == N)s += 'A';
else s += 'B';
}
else{
if(press(s + 'X') == N)s += 'X';
else s += 'Y';
}
return s;
}
string guess_sequence(int N){
string s = getfnl("", 1);
string g = "AXBY";
int ignid = -1;
for(int i = 0; i < 4; i++){
if(s[0] == g[i])ignid = i;
}
string rem;
for(int i = 0; i < 4; i++){
if(i == ignid)continue;
rem += g[i];
}
if(size(s) == N)return s;
for(int i = 2; i < N; i++){
string p = s + rem[0] + s + rem[1] + rem[0] + s + rem[1] + rem[1] + s + rem[1] + rem[2];
if(press(p) == i){
s += rem[0];
}
else if(press(p) == i + 1){
s += rem[1];
}
else{
s += rem[2];
}
}
string p = s + 'A' + s + 'B';
if(press(p) == N){
if(press(s + 'A') == N)s += 'A';
else s += 'B';
}
else{
if(press(s + 'X') == N)s += 'X';
else s += 'Y';
}
return getfnl(s, N);
}
/*
*/
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