#include <iterator>	// provides istream_iterator and inserter

#include <vector>

#include <list>

#include <set>

#include <algorithm>	// provides copy, copy_backward

#include <numeric>	// provides accumulate

#include <iostream>

#include <ctype.h> // provides toupper

using namespace std;



void main()

{

	vector<int> v;

	// read a stream of integers from cin into v. The inserter function is described elsewhere in this chapter.

	copy(istream_iterator<int>(cin), istream_iterator<int>(), inserter(v, v.begin()));

	

	list<int> l(v.size());

	// copy_backward expects input iterators as its first two arguments and v both meets and exceeds that by 

	// providing random access iterators. The third argument must be at least an output iterator and l does

	// better by providing bidirectional iterators.

	copy_backward(v.begin(), v.end(), l.begin());



	set<int> s;

	// copy requires at least input iterators as its first arguments and an output iterator as its third

	copy(l.begin(), l.end(), inserter(s, s.begin()));	// make list of unique integers

	copy(s.begin(), s.end(), ostream_iterator<int>(cout," "));

	// accumulate requires at least input iterators as its two first arguments and s exceeds that by 

	// providing bidirectional iterators.

	cout << endl << "Accumulated sum: " << accumulate(s.begin(), s.end(), 0) << endl;

}