#include<iostream>
#include<fstream>
using namespace std;

struct node
{
	int val;
	node* next;
};

void insert(node*& H, int x);
void remove(node*& H);
void show(node* H);
//void zadanie1(??);
//void zadanie2(??);


int main()
{
	node* H = NULL;
	insert(H, 10);
	insert(H, 7);
	insert(H, 12);
	insert(H, 8);
	insert(H, 5);
	insert(H, 1);
	show(H);
	//zadanie1(???);
	//zadanie2(???);
	//show(H);


	system("PAUSE");
	return 0;
}

//void zadanie1(??)
//{
//}

//void zadanie2(??)
//{
//}


void insert(node*& H, int x)
{
	node* p;
	p = new node;
	p->val = x;
	p->next = H;
	H = p;
}

void remove(node*& H)
{
	if (H != NULL)
	{
		node* p = H;
		H = p->next;
		delete p;
	}
}

void show(node* H)
{
	node* p = H;
	cout << "H -> ";
	while (p != NULL)
	{
		cout << p->val << " -> ";
		p = p->next;
	}
	cout << "NULL" << endl;
}