#include <iostream>
using namespace std;
struct struktura{
	int x, y;
	struktura *slijedeci;
};
struct strukturaP{
	struktura *front,*rear;
};
typedef strukturaP queue;
typedef struktura atrib;
 
queue *InitQ(queue *&Q){
	Q=new queue;
	atrib *novi=new atrib;
	Q->front=novi;
	Q->rear=novi;
	novi->slijedeci=NULL;    
	return Q;
};
 
atrib FrontQ(queue *Q){
	atrib pom;
	pom.x=pom.y=-1;
	if(Q->rear != Q->front){
		pom.x=Q->front->slijedeci->x;
		pom.y=Q->front->slijedeci->y;
	}
	return pom;
};
 
void EnQueueQ(atrib x, queue *Q){
	atrib *novi=new atrib;
	novi->x=x.x;
	novi->y=x.y;
	novi->slijedeci=NULL;
	Q->rear->slijedeci=novi;
	Q->rear=novi;
};
 
void DeQueueQ(queue *Q){
	if(Q->rear != Q->front){
		atrib *pom=Q->front;
		Q->front=Q->front->slijedeci;
		delete pom;
	}
	else 
		cout<<"Prazan red!"<<endl;
};
 
bool IsEmptyQ(queue *Q){
	if(Q->rear != Q->front)
		return false;
	return true;
};