popravni-2014-zad5-f(f(f(f(n))))

#include <iostream>
#include <vector>
#include <stdexcept>
#include <functional>


using namespace std;

template < typename T, typename FunkTip>
auto Fja(T x,FunkTip f, int n)->decltype (x)
 {
 auto rez=f(x);
for (int i=1; i<=n; i++) {
   rez=f(rez);
}
return rez;
}



int main () {
cout<<Fja(10, [] (int x) {return 3*x*x-5;} ,5);

return 0;
}