水

#include <cstring>
#include <iostream>
#include <algorithm>

using namespace std;
const int N = 35;
int n, m, f[N][N];
int main(){
    cin >> n >> m;
    f[0][1] = 1;
    for(int i = 1; i <= n; i ++ )
        for(int j = 1; j <= m; j ++ ){
            if(i % 2 || j % 2) f[i][j] = f[i - 1][j] + f[i][j - 1];
        }

    cout << f[n][m];
    return 0;
}