The Binding of Isaac is a randomly generated action RPG shooter with heavy roguelike elements.

During the game, the player can pick up different items and cause different effects after being used, which adds a lot to the gameplay of this game. Activated items are a special category of items. Each activated item can be used once it is fully charged, thus a charge bar is used to denote the current charging progress. To charge an activated item, the player needs to clear the rooms: a small room fills $$$1$$$ unit of the charge bar, while a large room fills $$$2$$$ units of the charge bar. Specifically, for an activated item with only $$$1$$$ unit uncharged, clearing a large room has the same impact as clearing a small room. Using the activated item will empty the charge bar.

The most powerful activated item in the game, Void, has a charge bar size of 6 units, with 5 units charged.

Now, Shuishui is holding an activated item with a charge bar size of $$$k$$$ units. Initially, the charge bar is empty, and there are $$$x$$$ uncleared small rooms and $$$y$$$ uncleared large rooms on the map. Shuishui can choose to clear the uncleared rooms in arbitrary order. Please calculate the maximum number of times Shuishui uses the item.