21 Merge Two Sorted Lists - https://leetcode.com/problems/merge-two-sorted-lists/
83 Remove Duplicates from Sorted List - https://leetcode.com/problems/remove-duplicates-from-sorted-list/
141 Linked List Cycle - https://leetcode.com/problems/linked-list-cycle/
160 Intersection of Two Linked Lists - https://leetcode.com/problems/intersection-of-two-linked-lists/
203 Remove Linked List Elements - https://leetcode.com/problems/remove-linked-list-elements/
206 Reverse Linked List - https://leetcode.com/problems/reverse-linked-list/
237 Delete Node in a Linked List - https://leetcode.com/problems/delete-node-in-a-linked-list/
350 Intersection of Two Arrays II - https://leetcode.com/problems/intersection-of-two-arrays-ii/
1221 Split a String in Balanced Strings - https://leetcode.com/problems/split-a-string-in-balanced-strings/
1678 Goal Parser Interpretation - https://leetcode.com/problems/goal-parser-interpretation/
1816 Truncate Sentence - https://leetcode.com/problems/truncate-sentence/
1844 Replace All Digits with Characters - https://leetcode.com/problems/replace-all-digits-with-characters/