参考大佬的代码
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int length = sc.nextInt(); int high = sc.nextInt(); System.out.println(cal(length, high)); } public static int cal (int n, int m) { if (n == 1 || m == 1) { return n + m; } return cal(n - 1, m) + cal(n, m - 1); } }