#include <boost/heap/skew_heap.hpp>
#include <vector>
#include <iostream>

class thing {
public:
	thing( int a_, int b_, int c_ ) : a(a_), b(b_), c(c_) {}
public:
	int a;
	int b;
	int c;
};

class cmpthings {
public:
	bool operator() ( const thing& lhs, const thing& rhs ) const  {
		return lhs.a > rhs.a;
	}
	bool operator() ( const thing& lhs, const thing& rhs ) {
		return lhs.a > rhs.a;
	}
};

int main(){

     cmpthings ord;
	 boost::heap::skew_heap<thing, boost::heap::compare<cmpthings>> vpq(ord);
     vpq.emplace(5,6,7);	
}