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 "combo.h"
#include<bits/stdc++.h>
//#include"grader.cpp"
using namespace std;
char cha[5]={'A','B','X','Y'};
std::string guess_sequence(int N) {
std::string p = "",ans="";
int coins;
char a=cha[0],b=cha[1],x=cha[2],y=cha[3];
p=ans+a+ans+b;
coins=press(p);
if(coins<1){
p=ans+x;
coins=press(p);
if(coins<1){
ans+=y;
}
else{
ans+=x;
swap(x,y);
}
}else{
p=ans+a;
coins=press(p);
if(coins<1){
ans+=b;
swap(b,y);
}else{
ans+=a;
swap(a,y);
}
}
// a b x
for (int i = 1; i < N;i+=2) {
// cout<< ans<<'\n';
// aa ab ax bb ba bx xx xa xb
if(i+3>N){
if(i+1==N){
p=ans+a+ans+b;
coins=press(p);
if(coins==i){
ans+=x;
}else{
p=ans+a;
coins=press(p);
if(coins==i){
ans+=b;
}else{
ans+=a;
}
}
}else{
p=ans+a+ans+b+a+ans+b+b+ans+b+x;
coins=press(p);
if(coins==i+2){// ba bb bx
p=ans+b+a+ans+b+b;
coins=press(p);
if(coins==i+1){
ans=ans+b+x;
}else{
p=ans+b+a;
coins=press(p);
if(coins==i+2){
ans=ans+b+a;
}else ans=ans+b+b;
}
}else if(coins==i+1){//ab aa ax
p=ans+a+a+ans+a+b;
coins=press(p);
if(coins==i+1){
ans=ans+a+x;
}else{
p=ans+a+a;
coins=press(p);
if(coins==i+2){
ans=ans+a+a;
}else ans=ans+a+b;
}
}else{//xa xb xx
p=ans+x+a+ans+x+b;
coins=press(p);
if(coins==i+1){
ans=ans+x+x;
}else{
p=ans+x+a;
coins=press(p);
if(coins==i+2){
ans=ans+x+a;
}else ans=ans+x+b;
}
}
}
break;
}
p=ans+a+a+ans+b+b+ans+a+x;
coins = press(p);
// cout<<p<<" "<<coins<<'\n';
if(coins==i+2){//aa or bb or ax
p=ans+a+ans+a+x;
coins=press(p);
if(coins==i){//bb
ans=ans+b+b;
}else if(coins==i+1){//aa
ans=ans+a+a;
}else{//ax
ans=ans+a+x;
}
}else if(coins==i+1){
// ab ba bx
p=ans+a+b+ans+b+a+a+ans+b+a+b+ans+b+a+x;
coins=press(p);
if(coins==i+1){
ans=ans+b+x;
}else if(coins==i+2){
ans=ans+a+b;
}else{
ans=ans+b+a;
}
}else{
//xa xb xx
p=ans+x+a+ans+x+b+a+ans+x+b+b+ans+x+b+x;
coins=press(p);
if(coins==i+1){
ans=ans+x+x;
}else if(coins==i+2){
ans=ans+x+a;
}else{
ans=ans+x+b;
}
}
}
return ans;
}
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