include

using namespace std;

int main() { int n; cin >> n; int p; cin >> p; int a = 1; int b = 2; int c = 3; int d = 4;

for(int i = 0; i < p; i++)
{
    if((p = c + a))
    {

        p = p;


    }else if(b%2==1)
    {

        p = (a - c -2)/4;


    }else if((p = b + b)){

    p = p;

    }else if(a%4==0){


    p = (d - a - 3)/4;


    }else if(c%1!=0){


    p = (c - b - 1)/4;

    p++;
    }

}

cout << p << endl;

return 0;

}