#define SIZE 4

int move(int direction, int board[SIZE][SIZE]);

void init(int board[SIZE][SIZE]);

void add2(int board[SIZE][SIZE]);

void rotate(int board[SIZE][SIZE]);

int slideLeft(int board[SIZE][SIZE]);
int slideRight(int board[SIZE][SIZE]);
int slideUp(int board[SIZE][SIZE]);
int slideDown(int board[SIZE][SIZE]);
int gameover(int board[SIZE][SIZE]);

int push(int array[SIZE]);