T.

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

int main() {
    int n, m;
    cin >> n >> m;
    vector<vector<int>> dp(n + 2, vector<int> (m + 2));
    dp[2][2] = 1;
    for(int i = 2; i <= n + 1; ++i){
        for(int j = 2; j <= m + 1; ++j){
            if(i != 2 || j != 2)
                dp[i][j] = dp[i-2][j-1] + dp[i-1][j - 2];
        }
    }
    cout << dp[n + 1][m + 1];
    return 0;
}