Submission #167106

#	Time	Username	Problem	Language	Result	Execution time	Memory
167106		minseo852	Combo (IOI18_combo)	C++11	Compilation error	0 ms	0 KiB

combo

#include <string>
#include <vector>
#include <iostream>

using namespace std;


string guess_sequence(int N)
{
	string start;
	if (press("AB") == 1)
	{
		start = (press("A") == 1 ? "A" : "B");
	}
	else
		start = (press("X") == 1 ? "X" : "Y");
	
	vector<string> others = { "A", "B", "X", "Y" };
	for (int i = 0; i < 4; i++)
	if (others[i] == start)
	{
		others.erase(others.begin() + i);
		break;
	}
	
	string check;
	int count = 0;
	int digit = 1;
	string result;
	while (true)
	{
		check.clear();
		for (int i = 0; i < 4; i++, count++)
		{
			check += start;
			digit = 1;
			for (int j = 0; j < N-1; digit*=3, j++)
			{
				check += others[count%(digit*3)/digit];
			}
		}
		if (press(check) == N)
		{
			if (press(check.substr(0, 2 * N)) == N)
			{
				result = (press(check.substr(0, N)) == N ? check.substr(0, N) : check.substr(N, N));
			}
			else
			{
				result = (press(check.substr(2 * N, N)) == N ? check.substr(2 * N, N) : check.substr(3 * N, N));
			}

			break;
		}
	}


	return result;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:11:6: error: 'press' was not declared in this scope
   11 |  if (press("AB") == 1)
      |      ^~~~~
combo.cpp:42:7: error: 'press' was not declared in this scope
   42 |   if (press(check) == N)
      |       ^~~~~