#include <bits/stdc++.h>
using namespace std;

int main()
{
    int A, B;
    cin >> A >> B;
    int N = 255;
    long long ans = 1;
    for (int bit = 0; bit <= 8; bit++)
    {
        int A_bit = (A >> bit) & 1;
        int B_bit = (B >> bit) & 1;
        if (A_bit == 1 && B_bit == 0)
        {
            ans *= 0;
        }
        if (A_bit == 1 && B_bit == 1)
        {
            ans *= 2;
        }
    }
    cout << ans;
}