#include <iostream>
#include <fstream>
#include <vector>
using namespace std;

ifstream in;
ofstream out;

vector<int> rotate_right(vector<int> directions)
{
	vector<int> rotated;

	for(auto i: directions)
	{
		if(i % 2 == 0)
		{
			rotated.push_back(i - 1);
		}
		else
		{
			rotated.push_back(i + 1);
		}
	}

	return rotated;
}

vector<int> rotate_left(vector<int> directions)
{
	vector<int> rotated;

	for(auto i: directions)
	{
		rotated.push_back(5 - i);
	}

	return rotated;
}

vector<int> next_degree(vector<int> directions)
{
	vector<int> result;
	vector<int> rotated_right = rotate_right(directions);
	vector<int> rotated_left = rotate_left(directions);

	result.insert(result.end(), rotated_right.begin(), rotated_right.end());
	result.push_back(1);
	result.insert(result.end(), directions.begin(), directions.end());
	result.push_back(2);
	result.insert(result.end(), directions.begin(), directions.end());
	result.push_back(3);
	result.insert(result.end(), rotated_left.begin(), rotated_left.end());

	return result;
}

int main() {
	int k, x, y, steps = 0, tempx = 1, tempy = 1;

	vector<int> directions;
	directions.push_back(1);
	directions.push_back(2);
	directions.push_back(3);

	in.open("fractal.in");
	in >> k >> x >> y;
	in.close();

	for(int i = 0; i < k - 1; i++)
	{
		directions = next_degree(directions);
	}

	for(auto i: directions)
	{
		if(tempx == x && tempy == y)
			break;

		switch(i)
		{
			case 1:
				tempy++;
				break;
			case 2:
				tempx++;
				break;
			case 3:
				tempy--;
				break;
			case 4:
				tempx--;
				break;
		}

		steps++;
	}

	out.open("fractal.out");
	out << steps;
	out.close();

	return 0;
}