1. partial_sort( b, se, e )

2. partial_sort( b, se, e, p )

3. partial_sort_copy( sb, se, db, de )

4. partial_sort_copy( sb, se, db, de,  p )

#include <iostream>
#include <algorithm>
#include <vector>
#include <list>
#include <deque>
#include <functional>

using namespace std;

template<typename T>
void Print(const T& t)
{
	for(typename T::const_iterator itr=t.begin(); itr!=t.end(); ++itr)
	{
		cout<<*itr<<' ';
	}cout<<endl;
}

int main( int argc, char** argv )
{
	deque<int> deq;

	for(int i=3; i<=7; ++i)
	{
		deq.push_back(i);
	}
	for(int i=2; i<=6; ++i)
	{
		deq.push_back(i);
	}
	for(int i=1; i<=5; ++i)
	{
		deq.push_back(i);
	}
	Print(deq);

	partial_sort(deq.begin(), deq.begin()+5, deq.end());
	Print(deq);
	partial_sort(deq.begin(), deq.begin()+5, deq.end(), greater<int>());
	Print(deq);


	return 0;
}
 

#include <iostream>
#include <algorithm>
#include <iterator>
#include <vector>
#include <list>
#include <deque>
#include <functional>

using namespace std;

template<typename T>
void Print(const T& t)
{
	for(typename T::const_iterator itr=t.begin(); itr!=t.end(); ++itr)
	{
		cout<<*itr<<' ';
	}cout<<endl;
}

int main( int argc, char** argv )
{
	deque<int> deq;
	vector<int> vec6(6);
	vector<int> vec30(30);

	for(int i=3; i<=7; ++i)
	{
		deq.push_back(i);
	}
	for(int i=2; i<=6; ++i)
	{
		deq.push_back(i);
	}
	for(int i=1; i<=5; ++i)
	{
		deq.push_back(i);
	}
	Print(deq);

	partial_sort_copy(deq.begin(), deq.end(), vec6.begin(), vec6.end());
	Print(vec6);
	vector<int>::iterator pos;
	pos = partial_sort_copy(deq.begin(), deq.end(), vec30.begin(), vec30.end(), 
			greater<int>());
	Print(vec30);
	copy(vec30.begin(), pos, ostream_iterator<int>(cout, " "));
	cout<<endl;


	return 0;
}