#include <iostream>
#include <string>
#include <fstream>
#include <queue>
#include <functional>

using namespace std;


int comp (int i1, int i2)
{
	return abs(i1) < abs(i2);
}

int main (){

	priority_queue<int> Q (0, 1000000, ptr_fun(comp));

	return 0;
}

/*
The error i get

milk2.cpp: In function ‘int main()’:
milk2.cpp:42: error: no matching function for call to ‘std::priority_queue<int, std::vector<int, std::allocator<int> >, std::less<int> >::priority_queue(int, int, std::pointer_to_binary_function<int, int, int>)’
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/stl_queue.h:365: note: candidates are: std::priority_queue<_Tp, _Sequence, _Compare>::priority_queue(const _Compare&, const _Sequence&) [with _Tp = int, _Sequence = std::vector<int, std::allocator<int> >, _Compare = std::less<int>]
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/stl_queue.h:338: note:                 std::priority_queue<int, std::vector<int, std::allocator<int> >, std::less<int> >::priority_queue(const std::priority_queue<int, std::vector<int, std::allocator<int> >, std::less<int> >&)
*/