#include <iostream>
using namespace std;

int f(int x){
	cout << "in f x = " << x << endl;
	if(x==1){
		cout << "returning 1" << endl;
		return 1;
	}
	
	int z = x * f(x-1);
	cout << "in f z = " << z << endl;
	return z;
}

void main(){
   cout << f(5) << endl;
}