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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int a, b;
    cin >> a >> b;
    if((a & b) != a){
        cout << "0\n";
        return 0;
    }
    cout << (1ll << __builtin_popcount(a & b)) << '\n';
}