#ifndef T_ITERATORH
#define T_ITERATORH
#include <iterator>
using namespace std;

//T must be copy constructable (line 13), incrementable (line 16),
//and equality comparable (line 25).

template <class T = int>
class t_iterator: public iterator<forward_iterator_tag, T> {
	T t;
public:
	t_iterator(const T& initial_t = T()): t(initial_t) {}
	const T& operator*() const {return t;}

	t_iterator& operator++() {++t; return *this;}

	const t_iterator operator++(int) {
		const t_iterator old = *this;
		++*this;
		return old;
	}

	friend bool operator==(const t_iterator& it1, const t_iterator& it2) {
		return it1.t == it2.t;
	}
};

template <class T>
inline bool operator!=(const t_iterator<T>& it1, const t_iterator<T>& it2) {
	return !(it1 == it2);
}
#endif