#include <iostream>
#include <fstream>

using namespace std;
ifstream f ("pascal.in");
ofstream g ("pascal.out");

int main()
{
    int r,c=1,s,i,j,ct=0,d;
    f>>r;
    f>>d;
    r++;
    for(i=0;i<r;i++)
    {
        for(s=1;s<=r-i;s++)
            for(j=0;j<=i;j++)
            {
                if (j==0||i==0)
                    c=1;
                else
                   c=c*(i-j+1)/j;
                if (i==r-1)
                    if (c%2==0)
                        ct++;
            }
    }
    g<<ct;
    f.close();
    g.close();
}