满分求助（递归）

#include<bits/stdc++.h>
using namespace std;
int mm,nm;
int A(int m,int n){
	if(m==0)return n+1;
	if(m!=0&&n==0)return A(m-1,1);
	if(m!=0&&n!=0)return A(m-1,A(m,n-1));
}
int main(){
	cin>>mm>>nm;
	cout<<A(mm,nm);
	return 0;
}