Tags » 99 problems 2026 20 Feb Flatten a Nested List, official 8 Feb Find the Kth Element, official 2 Feb Flatten a Nested List Structure 1 Feb Find Out Whether a List is a Palindrome 29 Jan Reverse a List 25 Jan Find the Number of Elements of a List 23 Jan Find the Kth Element of a List 22 Jan Find the Second-to-Last Element of a List 19 Jan Find the Last Element of a List
