## [30DaysofCode](https://www.hackerrank.com/domains/tutorials/30-days-of-code)

|Problem Name|Problem Link|Language|Solution Link|
---|---|---|---
|Day 0: Hello, World.|[Problem](https://www.hackerrank.com/challenges/30-hello-world/problem)|java|[Solution](./Day0:Hello,World..java)|
|Day 10: Binary Numbers|[Problem](https://www.hackerrank.com/challenges/30-binary-numbers/problem)|java|[Solution](./Day10:BinaryNumbers.java)|
|Day 11: 2D Arrays|[Problem](https://www.hackerrank.com/challenges/30-2d-arrays/problem)|java|[Solution](./Day11:2DArrays.java)|
|Day 12: Inheritance|[Problem](https://www.hackerrank.com/challenges/30-inheritance/problem)|java|[Solution](./Day12:Inheritance.java)|
|Day 13: Abstract Classes|[Problem](https://www.hackerrank.com/challenges/30-abstract-classes/problem)|java|[Solution](./Day13:AbstractClasses.java)|
|Day 14: Scope|[Problem](https://www.hackerrank.com/challenges/30-scope/problem)|java|[Solution](./Day14:Scope.java)|
|Day 15: Linked List|[Problem](https://www.hackerrank.com/challenges/30-linked-list/problem)|java|[Solution](./Day15:LinkedList.java)|
|Day 16: Exceptions - String to Integer|[Problem](https://www.hackerrank.com/challenges/30-exceptions-string-to-integer/problem)|java|[Solution](./Day16:Exceptions-StringtoInteger.java)|
|Day 17: More Exceptions|[Problem](https://www.hackerrank.com/challenges/30-more-exceptions/problem)|java|[Solution](./Day17:MoreExceptions.java)|
|Day 18: Queues and Stacks|[Problem](https://www.hackerrank.com/challenges/30-queues-stacks/problem)|java|[Solution](./Day18:QueuesandStacks.java)|
|Day 19: Interfaces|[Problem](https://www.hackerrank.com/challenges/30-interfaces/problem)|java|[Solution](./Day19:Interfaces.java)|
|Day 1: Data Types|[Problem](https://www.hackerrank.com/challenges/30-data-types/problem)|java|[Solution](./Day1:DataTypes.java)|
|Day 20: Sorting|[Problem](https://www.hackerrank.com/challenges/30-sorting/problem)|java|[Solution](./Day20:Sorting.java)|
|Day 21: Generics|[Problem](https://www.hackerrank.com/challenges/30-generics/problem)|java|[Solution](./Day21:Generics.java)|
|Day 22: Binary Search Trees|[Problem](https://www.hackerrank.com/challenges/30-binary-search-trees/problem)|java|[Solution](./Day22:BinarySearchTrees.java)|
|Day 23: BST Level-Order Traversal|[Problem](https://www.hackerrank.com/challenges/30-binary-trees/problem)|java|[Solution](./Day23:BSTLevel-OrderTraversal.java)|
|Day 24: More Linked Lists|[Problem](https://www.hackerrank.com/challenges/30-linked-list-deletion/problem)|java|[Solution](./Day24:MoreLinkedLists.java)|
|Day 25: Running Time and Complexity|[Problem](https://www.hackerrank.com/challenges/30-running-time-and-complexity/problem)|java|[Solution](./Day25:RunningTimeandComplexity.java)|
|Day 26: Nested Logic|[Problem](https://www.hackerrank.com/challenges/30-nested-logic/problem)|java|[Solution](./Day26:NestedLogic.java)|
|Day 27: Testing|[Problem](https://www.hackerrank.com/challenges/30-testing/problem)|java|[Solution](./Day27:Testing.java)|
|Day 28: RegEx, Patterns, and Intro to Databases|[Problem](https://www.hackerrank.com/challenges/30-regex-patterns/problem)|java|[Solution](./Day28:RegEx,Patterns,andIntrotoDatabases.java)|
|Day 29: Bitwise AND|[Problem](https://www.hackerrank.com/challenges/30-bitwise-and/problem)|java|[Solution](./Day29:BitwiseAND.java)|
|Day 2: Operators|[Problem](https://www.hackerrank.com/challenges/30-operators/problem)|java|[Solution](./Day2:Operators.java)|
|Day 3: Intro to Conditional Statements|[Problem](https://www.hackerrank.com/challenges/30-conditional-statements/problem)|java|[Solution](./Day3:IntrotoConditionalStatements.java)|
|Day 4: Class vs. Instance|[Problem](https://www.hackerrank.com/challenges/30-class-vs-instance/problem)|java|[Solution](./Day4:Classvs.Instance.java)|
|Day 5: Loops|[Problem](https://www.hackerrank.com/challenges/30-loops/problem)|java|[Solution](./Day5:Loops.java)|
|Day 6: Let's Review|[Problem](https://www.hackerrank.com/challenges/30-review-loop/problem)|java|[Solution](./Day6:Let'sReview.java)|
|Day 7: Arrays|[Problem](https://www.hackerrank.com/challenges/30-arrays/problem)|cpp|[Solution](./30-arrays.cpp)|
|Day 8: Dictionaries and Maps|[Problem](https://www.hackerrank.com/challenges/30-dictionaries-and-maps/problem)|java|[Solution](./Day8:DictionariesandMaps.java)|
|Day 9: Recursion 3  |[Problem](https://www.hackerrank.com/challenges/30-recursion/problem)|java|[Solution](./Day9:Recursion3.java)|