#include <iostream>

using namespace std;

int recur_ex(int m, int n);

// This assignment is worth 4 points

int main()
{
	unsigned int x, y;
	cout << "Enter two numbers: ";
	cin >> x >> y;
	cin.ignore();

	cout << "f(" << x << ", " << y << ") = " << recur_ex(x, y) << endl;
	return 0;
}

int recur_ex(int m, int n)
{
	if(m == 0 && n > 0)
		return n+1;
	else if(n == 0 && m > 0)
		return m+1;
	else if(m > 0 && n > 0)
		return recur_ex(m-1, n) + recur_ex(m, n-1);
}