//Basic libraries
#include <iostream>
#include <fstream>
#include <stdio.h>//cerut de evaluator (cred...)
using namespace std;
void rot ( int n, int *x, int *y, int rx, int ry )
{
	if ( ry == 0 )
	{
		if ( rx == 1 )
		{
			*x = n - 1 - *x;
			*y = n - 1 - *y;
		}

		int t  = *x;
		*x = *y;
		*y = t;
	}
}

int xy2d ( int n, int x, int y )
{
	int rx, ry, s, d = 0;

	for ( s = n / 2; s > 0; s /= 2 )
	{
		rx = ( x & s ) > 0;
		ry = ( y & s ) > 0;
		d += s * s * ( ( 3 * rx ) ^ ry );
		rot ( s, &x, &y, rx, ry );
	}

	return d;
}


int main()
{
	ifstream f ( "fractal.in" );
	ofstream g ( "fractal.out" );
	int k, x, y;
	f >> k >> x >> y;
	//flip x and y to appropriate coordinates
	int W = 1;

	for ( int i = 0; i < k; i++ ) W *= 2; //W = 2^k;

	//normalize coordinates
	x -= 1;
	y -= 1;
	g << xy2d ( W, x, y );
	f.close();
	g.close();
	return 0;
}