Must-do problems: Lists

140 min · Intermediate

Every problem here is solved with a list: read the input into an ArrayList (or a LinkedList), then add, insert, remove and search, and print the list with its own toString(). Mind remove(int) against remove(Object), never remove inside a for-each loop, and run every test before opening a hint.

What you will learn

Read input into an ArrayList and use add, add(index), get, remove and set correctly
Choose between remove(int) and remove(Object) on an Integer list
Remove items safely with removeIf and search with indexOf and contains
Use a LinkedList at both ends for queue-style problems

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