#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 = -x;
        }
    }
    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;
        ll rem = n % 8;
        ll d = solve(a, rem) - solve(x, rem);
        cout << solve(x, rem) + F * d << endl;
    }
    else {
        cout << solve(x, 16) << endl;
    }

    return 0;
}