#include <iostream>
using namespace std;
int a=10;
int go(int b)
    {
        if(b<=4)
        return b;
        else 
        return go(b+1)*go(b-2)-(b*2);
        ++a;
        cout<<a;
        return -1;
    }
    
int main() {
	
	cout << "go(2) returns " << go(2);
	// your code goes here
	return 0;
}