The following code implements the pop method of the Stack class for stacks that hold int values. The variable size holds the amount of values currently on the stack. In the pop method, the value at the top of the stack is assigned to number, the size of the stack is decremented by $1,$ and the number is returned.

public $\_\_\_\_\_$ pop$()\{$

$\_\_\_\_\_$ number $=$ elements$[\_\_\_\_\_\_-1]$;

size$\_\_\_\_$;

return $\_\_\_\_\_\_\_\_\_$;

$\}$