void FindBrothers (uint node_num, uint padre, uint &left, uint &right);
Clave *ReplaceKeyInFather (uint node_num, uint padre, Clave *k);
Clave *GetKey (uint node_num, char maxmin);
void FindBrothers (uint node_num, uint padre, uint &left, uint &right);
Clave *ReplaceKeyInFather (uint node_num, uint padre, Clave *k);
Clave *GetKey (uint node_num, char maxmin);