Submission #167120

#	Time	Username	Problem	Language	Result	Execution time	Memory
167120		minseo852	Combo (IOI18_combo)	C++11	5 / 100	722 ms	424 KiB

combo

#include <combo.h>
#include <bits/stdc++.h>
#include <string>
#include <vector>
#include <iostream>

using namespace std;

int countchar[2000] = { 0 };

void countup()
{
	countchar[0] += 1;
	for (int i = 0; i < 1999; i++)
	{
		if (countchar[i] > 2)
		{
			countchar[i] = 0;
			countchar[i + 1] += 1;
			continue;
		}
		break;
	}
}

string guess_sequence(int N)
{
	string start;
	if (press("AB") >= 1)
	{
		start = (press("A") == 1 ? "A" : "B");
	}
	else
		start = (press("X") == 1 ? "X" : "Y");
	
	if (N == 1)
		return start;

	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;
	string result;
	while (true)
	{
		check.clear();
		for (int i = 0; i < 4; i++)
		{
			check += start;
			for (int j = 0; j < N-1; j++)
			{
				check += others[countchar[j]];
			}
			countup();
		}

		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;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95