remove removes e from its list, decrements l.len, and returns e.

Returns the value at the front of the queue. i.e. the oldest value in the queue. Note: this function does mutate the queue. go-routine safe.

pointers to all 3 stacks * returns index of the top of the stack "stackNum", in absolute terms */

Returns k-th most-significant bit.

lazyInit lazily initializes a zero List value.

Returns false if the queue is empty i. e function used to identify whether the queue is empty

Push a new element onto the stack

Set (x, y) and fill the surrounding area until the color changes.

* Add the elements till the middle of LL to a stack and check the rest elements */

Return a new Screen object, initialized with 'pixels'.