ÇIKTIYI BULMAYA ÇALIŞIN !

#include <iostream>
using namespace std;
int f1(int a)
{
    cout<<++a<<endl;
    return a+5;

}
int f2(int a){
cout<<--a<<endl;
return f1(a);

}
int f3(int a)
{
    cout<<a++<<endl;
return f1(a)+f2(a+7);
}
int f4(int a)
{
    cout<<++a<<endl;
    a+=5;
    return a+f3(3);
}
int main()
{
int a=5;
cout<<f3(3)+f3(f2(f1(3)))<<endl;

}