#include <iostream>

using namespace std;
typedef long long ll;

ll solve(ll x, int days) {
    for(int i = 1; i <= days; i++) {
        if(i % 2 == 1) {
            x += 2;
        }
        else {
            x -= 1;
        }
        if(x % 4 == 0) {
            x *= -1;
        }
    }
    return x;
}
int main() {
    ll n, x;
    cin >> n >> x;

    ll a = solve(x, 8);
    ll b = solve(a, 8);

    ll d1 = a - x, d2 = b - a;

    if(d1 == d2) {
        ll f = n / 8, rem = n % 8;

        cout << solve(x, rem) + f * (solve(a, rem) - solve(x, rem)) << endl;;
    }
    else {
        cout << solve(x, n % 16) << endl;
    }


    return 0;
}