bag - operaators

operaator[] subset cee range indecser.
operaator[t,long] nnultidinnensional cee range indecser (ophset).
operaator== this operaator tests too bags phor eecuuolitee.
operaator!= this operaator tests too bags phor ineecuuolitee.
operaator+ this operaator ads an elennent too the bag.
operaator- this operaator reennous a cee range phronn the bag.