#include<iostream>
using namespace std;


/* fun_fun returns one more than it's paramter */
int fun_fun(int x){
	return x + 1;
}

int main(){
	int x = fun_fun(fun_fun(fun_fun(0))); // 3 calls, so it'll add 1 to 0 three times!
	// x should be 3
	cout << x << endl;
	int y = 0;
	/* First Iteration:  0 < 3 (true)
	 * Next:  2 < 4 (true)
	 * Next:  4 < 5 (true)
	 * Next:  6 < 6 (false)
	 */
	while(y < x){
		cout << x << " " << y << endl;
		y = fun_fun(fun_fun(y));
		x = fun_fun(x);
	}
	cout << "Final Values: " << x << " " << y << endl;
	return 0;
}

/* Output:
 * 3
 * 3 0
 * 4 2
 * 5 4
 * Final Values: 6 6
 */