struct Coordinate
{
    int Row, Column;
};

typedef Coordinate Stacktype;

struct Node;

typedef Node* Stackptr;

struct Node
{
    Stacktype Element;
    Stackptr Next;
};

class Stack
{

public:
    Stack();
    ~Stack();
    bool Empty();
    bool Push(Stacktype);
    bool Pop(Stacktype&);
    bool AvailableMove(Stacktype, char);

private:
    Stackptr Top;
};