#include<stdio.h> int factorial(int n, int m) { int result; else if (n==0 || m==0) { result = 1; } else { result = factorial(n - 1, m) + factorial(n, m - 1); } return result; } int main(){ int n = 0; int m = 0; scanf("%d %d", &n, &m); printf("%d",factorial(n, m)); return 0; }