Part 1 : Complete method skipEveryOther().
//method skipEveryOther will remove every other node
public void skipEveryOther(ListNode list)
{
//// Code goes here ////
}
Part 2 : Complete method doubleUp().
//method doubleUp will double the size of the list by adding in
//new nodes with the same values as the original list nodes
public void doubleUp(ListNode list)
{
////// Code goes here //////
}