#include <iostream>
#include <vector>
using namespace std;

typedef long long ll;
typedef vector<ll> VLL;

VLL F1(182, -1), F0(182, -1);
int z, u;

ll f1(int n, int z, int u);


ll f0(int n, int z, int u){
    ll& res = F0[n];
    if (z < 0 or u < 0) return 0;
    if (res != -1) return res;
    if (n == 1 and u == 1) return 1;
    if (n == 1) return 0;
    return res = f1(n-1, z-1, u);
}


ll f1(int n, int z, int u){
    ll& res = F1[n];
    if (z < 0 or u < 0) return 0;
    if (res != -1) return res;
    if (n == 1) if (z == 1 or u == 1) return 1;
    if (n == 1) return 0;
    if (n > 2) return res = f0(n-1, z, u-1) + f0(n-2, z, u-2);
    return res = f0(n-1, z, u-1) + f1(n-1, z-1, u);
}


int main(){
    while(cin >> z >> u){
        cout << (z+u == 0 ? 1 : (f0(z+u, z, u) + f1(z+u, z, u))) << endl;
    }
}