#include <iostream>
using namespace std;
int akm(int m, int n)
{
    if (m == 0)
    return (n+1);
    else if (n == 0)
    return (akm(m - 1,1));
    else
    return (akm(m - 1, akm(m,n-1)));
}
int main()
{
    int m, n;
    cin >> m >> n;
    cout << akm(m,n) << endl;
    return 0;
}