This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#include "combo.h"
using namespace std;
string guess_sequence(int N){
string ans = "";
vector<char> opcje = {'A','B','X','Y'};
int res;
res = press("AB");
if (res){
res = press("A");
if (res){
ans += 'A';
swap(opcje[0], opcje[3]);
opcje.pop_back();
}
else{
ans += 'B';
swap(opcje[1], opcje[3]);
opcje.pop_back();
}
}
else{
res = press("X");
if (res){
ans += 'X';
swap(opcje[2], opcje[3]);
opcje.pop_back();
}
else{
ans += 'Y';
opcje.pop_back();
}
}
for (int i = 2; i <= N-1; i++){
res = press(ans+opcje[0] + ans+opcje[1]+opcje[0] + ans+opcje[1]+opcje[1] + ans+opcje[1]+opcje[2]);
if (res == i){
ans += opcje[0];
}
else if (res == i+1){
ans += opcje[1];
}
else{
ans += opcje[2];
}
}
if (N != 1){
res = press(ans+opcje[0] + ans+opcje[1]);
if (res != N){
ans += opcje[2];
}
else if (press(ans+opcje[0]) == N){
ans += opcje[0];
}
else ans += opcje[1];
}
return ans;
}
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