#include <iostream>
#include <cstring>

using namespace std;

const int N = 40;

int n,m;
int f[N][N];

int main(){
    cin >> n >> m;
    f[1][1] = 1;
    for(int i = 1;i <= n;i++){
        for (int j = 1;j <= m;j++){
            if(i==1 && j==1) continue ;
            if(i%2 ||j%2){
                f[i][j] = f[i-1][j] +f[i][j-1];
            }
        }
    }
    cout <<f[n][m]<<endl;
    return 0;
}