Given a string s, return a list containing of all possible partitions of that string that are palindromes. A palindrome is a string that is the same backwards as forwards. For example, abba is a palindrome.
The string aab can be partitioned as follows: [['a','a','b'], ['aa','b']]. This is because a single character is by definition a palindrome.
Given the head of a linked list, remove all items with val. Afterwards, return the new head.
Given an array nums, delete all items that are equal to val. Return the total number of remaining items and perform the deletion in place.
Traverse a tree where the root node is given with a zig-zag level and return the values in a list with one entry per level. For example:
--> 3
/ \
9 5 <--
/ \
--> 7 8
Returns: [[3], [5,9], [7,8]]
Given the root node of a binary tree, print all values in order, meaning from left to right on the same level.
To solve this, we can use the standard breadth-first-search (BFS) algorithm in an iterative fashion with a queue. As an output we use a list and leverage the position -1 to add the current level to the list. For every level we append one new element to the end of the list.