#include <iostream>
#include <vector>
#include <fstream>
#include <queue>
using namespace std;
typedef long long ll;

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

    ll F = n / 8;
    ll rem = n % 8;

    ll a = solve(x, 8);

    ll d = solve(a, rem) - solve(x, rem);

    cout << solve(x, rem) + F * d;

    return 0;
}