import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static int findWays(int n, int m) { if (n == 1) { return m + 1; } else if (m == 1) { return n + 1; } else { return findWays(n, m - 1) + findWays(n - 1, m); } } public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); int m = in.nextInt(); int result = findWays(n, m); System.out.print(result); } }