| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 309721 | lukameladze | Combo (IOI18_combo) | C++14 | 0 ms | 0 KiB |
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 <cstdio>
#include <cstdlib>
#include <algorithm>
# include <iostream>
#include <string>
using namespace std;
namespace {
const int MAX_N = 2000;
const int MAX_NUM_MOVES = 8000;
int N;
std::string S;
int num_moves;
void wrong_answer(const char *MSG) {
printf("Wrong Answer: %s\n", MSG);
exit(0);
}
} // namespace
int press(std::string p) {
cout<<p<<endl<<endl;
if (++num_moves > MAX_NUM_MOVES) {
wrong_answer("too many moves");
}
int len = p.length();
if (len > 4 * N) {
cout<<p<<endl;
wrong_answer("invalid press");
}
for (int i = 0; i < len; ++i) {
if (p[i] != 'A' && p[i] != 'B' && p[i] != 'X' && p[i] != 'Y') {
cout<<p<<endl;
wrong_answer("invalid press");
}
}
int coins = 0;
for (int i = 0, j = 0; i < len; ++i) {
if (j < N && S[j] == p[i]) {
++j;
} else if (S[0] == p[i]) {
j = 1;
} else {
j = 0;
}
coins = std::max(coins, j);
}
return coins;
}
std::string guess_sequence(int N)
{
std::string pref;
std::string p="AB";
int c=press(p);
if (c)
{
p="A";
c=press(p);
if (c)
pref="A";
else pref="B";
}
else
{
p="X";
c=press(p);
if (c)
pref="X";
else pref="Y";
}
if (pref=="A")
{ while (pref.size()<N-1)
{
cout<<pref<<" 1"<<endl;
p=pref+"B"+pref+"XY"+pref+"XB"+pref+"XX";
c=press(p);
if(c==pref.size()+1)
{
pref+="B";
}
else
if (c==pref.size()+2)
{
pref+="X";
}
else pref+="Y";
}
c=press(pref+"X");
if (c==N)
pref+="X";
else
{
c=press(pref+"Y");
if (c==N)
pref+="Y";
if (pref.size()!=N)
pref+="B";
}
}
if (pref=="X")
{
while (pref.size()<N-1)
{
// cout<<pref<<" 1"<<endl;
p=pref+"B"+pref+"AY"+pref+"AB"+pref+"AA";
c=press(p);
if(c==pref.size()+1)
{
pref+="B";
}
else
if (c==pref.size()+2)
{
pref+="A";
}
else pref+="Y";
}
c=press(pref+"A");
if (c==N)
pref+="A";
else
{
c=press(pref+"Y");
if (c==N)
pref+="Y";
if (pref.size()!=N)
pref+="B";
}
}
if (pref=="B")
{
while (pref.size()<N-1)
{
p=pref+"A"+pref+"XY"+pref+"XA"+pref+"XX";
c=press(p);
if(c==pref.size()+1)
{
pref+="A";
}
else
if (c==pref.size()+2)
{
pref+="X";
}
else pref+="Y";
}
c=press(pref+"X");
if (c==N)
pref+="X";
else
{
c=press(pref+"Y");
if (c==N)
pref+="Y";
if (pref.size()!=N)
pref+="A";
}
}
if (pref=="Y")
{
while (pref.size()<N-1)
{
p=pref+"B"+pref+"XA"+pref+"XB"+pref+"XX";
c=press(p);
if(c==pref.size()+1)
{
pref+="B";
}
else
if (c==pref.size()+2)
{
pref+="X";
}
else pref+="A";
}
// cout<<pref<<endl;
c=press(pref+"X");
if (c==N)
pref+="X";
else
{
c=press(pref+"A");
if (c==N)
pref+="A";
if (pref.size()!=N)
pref+="B";
}
}
return pref;
}
int main() {
char buffer[MAX_N + 1];
if (scanf("%s", buffer) != 1) {
fprintf(stderr, "Error while reading input\n");
exit(1);
}
S = buffer;
N = S.length();
num_moves = 0;
std::string answer = guess_sequence(N);
if (answer != S) {
wrong_answer("wrong guess");
exit(0);
}
printf("Accepted: %d\n", num_moves);
return 0;
}