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HackerRank-Solutions

★ 34 Open GitHub ↗

HackerRank solutions written in Swift and a little bit in Java 🖖

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## Problem Solving - Algorithms

###### Subdomain: [Warmup](https://www.hackerrank.com/domains/algorithms?filters%5Bsubdomains%5D%5B%5D=warmup)
| # | Title                                            | Max Score |     Solution     | Difficulty |
|:-:|:-------------------------------------------------|:---------:|:----------------:|:-----------|
| 1 | [Solve Me First](https://www.hackerrank.com/challenges/solve-me-first/problem) | 1 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/01%20Warmup/01%20Solve%20Me%20First.swift) | 💚 Easy |
| 2 | [Simple Array Sum](https://www.hackerrank.com/challenges/simple-array-sum/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/01%20Warmup/02%20Simple%20Array%20Sum.swift) | 💚 Easy |
| 3 | [Compare the Triplets](https://www.hackerrank.com/challenges/compare-the-triplets/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/01%20Warmup/03%20Compare%20the%20Triplets.swift) | 💚 Easy |
| 4 | [A Very Big Sum](https://www.hackerrank.com/challenges/a-very-big-sum/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/01%20Warmup/04%20A%20Very%20Big%20Sum.swift) | 💚 Easy |
| 5 | [Diagonal Difference](https://www.hackerrank.com/challenges/diagonal-difference/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/01%20Warmup/05%20Diagonal%20Difference.swift) | 💚 Easy |
| 6 | [Plus Minus](https://www.hackerrank.com/challenges/plus-minus/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/01%20Warmup/06%20Plus%20Minus.swift) | 💚 Easy |
| 7 | [Staircase](https://www.hackerrank.com/challenges/staircase/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/01%20Warmup/07%20Staircase.swift) | 💚 Easy |
| 8 | [Mini-Max Sum](https://www.hackerrank.com/challenges/mini-max-sum/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/01%20Warmup/08%20Mini-Max%20Sum.swift) | 💚 Easy |
| 9 | [Birthday Cake Candles](https://www.hackerrank.com/challenges/birthday-cake-candles/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/01%20Warmup/09%20Birthday%20Cake%20Candles.swift) | 💚 Easy |
| 10 | [Time Conversion](https://www.hackerrank.com/challenges/time-conversion/problem) | 15 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/01%20Warmup/10%20Time%20Conversion.swift) | 💚 Easy |

###### Subdomain: [Implementation](https://www.hackerrank.com/domains/algorithms?filters%5Bsubdomains%5D%5B%5D=implementation)
| # | Title                                            | Max Score |     Solution     | Difficulty |
|:-:|:-------------------------------------------------|:---------:|:----------------:|:-----------|
| 1 | [Grading Students](https://www.hackerrank.com/challenges/grading/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/01%20Grading%20Students.swift) | 💚 Easy |
| 2 | [Apple and Orange](https://www.hackerrank.com/challenges/apple-and-orange/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/02%20Apple%20and%20Orange.swift) | 💚 Easy |
| 3 | [Number Line Jumps](https://www.hackerrank.com/challenges/kangaroo/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/03%20Number%20Line%20Jumps.swift) | 💚 Easy |
| 4 | [Between Two Sets](https://www.hackerrank.com/challenges/between-two-sets/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/04%20Between%20Two%20Sets.swift) | 💚 Easy |
| 5 | [Breaking the Records](https://www.hackerrank.com/challenges/breaking-best-and-worst-records/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/05%20Breaking%20the%20Records.swift) | 💚 Easy |
| 6 | [Subarray Division](https://www.hackerrank.com/challenges/the-birthday-bar/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/06%20Subarray%20Division.swift) | 💚 Easy |
| 7 | [Divisible Sum Pairs](https://www.hackerrank.com/challenges/divisible-sum-pairs/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/07%20Divisible%20Sum%20Pairs.swift) | 💚 Easy |
| 8 | [Migratory Birds](https://www.hackerrank.com/challenges/migratory-birds/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/08%20Migratory%20Birds.swift) | 💚 Easy |
| 9 | [Day of the Programmer](https://www.hackerrank.com/challenges/day-of-the-programmer/problem) | 15 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/09%20Day%20of%20the%20Programmer.swift) | 💚 Easy |
| 10 | [Bill Division](https://www.hackerrank.com/challenges/bon-appetit/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/10%20Bill%20Division.swift) | 💚 Easy |
| 11 | [Sales by Match](https://www.hackerrank.com/challenges/sock-merchant/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/11%20Sales%20by%20Match.swift) | 💚 Easy |
| 12 | [Drawing Book](https://www.hackerrank.com/challenges/drawing-book/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/12%20Drawing%20Book.swift) | 💚 Easy |
| 13 | [Counting Valleys](https://www.hackerrank.com/challenges/counting-valleys/problem) | 15 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/13%20Counting%20Valleys.swift) | 💚 Easy |
| 14 | [Electronics Shop](https://www.hackerrank.com/challenges/electronics-shop/problem) | 15 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/14%20Electronics%20Shop.swift) | 💚 Easy |
| 15 | [Cats and a Mouse](https://www.hackerrank.com/challenges/cats-and-a-mouse/problem) | 15 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/15%20Cats%20and%20a%20Mouse.swift) | 💚 Easy |
| 16 | [Forming a Magic Square](https://www.hackerrank.com/challenges/magic-square-forming/problem) | 20 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/16%20Forming%20a%20Magic%20Square.swift) | 💛 Medium |
| 17 | [Picking Numbers](https://www.hackerrank.com/challenges/picking-numbers/problem) | 20 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/17%20Picking%20Numbers.swift) | 💚 Easy |
| 18 | [Climbing the Leaderboard](https://www.hackerrank.com/challenges/climbing-the-leaderboard/problem) | 20 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/18%20Climbing%20the%20Leaderboard.swift) | 💛 Medium |
| 19 | [The Hurdle Race](https://www.hackerrank.com/challenges/the-hurdle-race/problem) | 15 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/19%20The%20Hurdle%20Race.swift) | 💚 Easy |
| 20 | [Designer PDF Viewer](https://www.hackerrank.com/challenges/designer-pdf-viewer/problem) | 20 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/20%20Designer%20PDF%20Viewer.swift) | 💚 Easy |
| 21 | [Utopian Tree](https://www.hackerrank.com/challenges/utopian-tree/problem) | 20 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/21%20Utopian%20Tree.swift) | 💚 Easy |
| 22 | [Angry Professor](https://www.hackerrank.com/challenges/angry-professor/problem) | 20 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/22%20Angry%20Professor.swift) | 💚 Easy |
| 23 | [Beautiful Days at the Movies](https://www.hackerrank.com/challenges/beautiful-days-at-the-movies/problem) | 15 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/23%20Beautiful%20Days%20at%20the%20Movies.swift) | 💚 Easy |
| 24 | [Viral Advertising](https://www.hackerrank.com/challenges/strange-advertising/problem) | 15 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/24%20Viral%20Advertising.swift) | 💚 Easy |
| 25 | [Save the Prisoner!](https://www.hackerrank.com/challenges/save-the-prisoner/problem) | 15 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/25%20Save%20the%20Prisoner!.swift) | 💚 Easy |
| 26 | [Circular Array Rotation](https://www.hackerrank.com/challenges/circular-array-rotation/problem) | 20 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/26%20Circular%20Array%20Rotation.swift) | 💚 Easy |
| 27 | [Sequence Equation](https://www.hackerrank.com/challenges/permutation-equation/problem) | 20 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Algorithms/Solutions/02%20Implementation/27%20Sequence%20Equation.swift) | 💚 Easy |

## Problem Solving - Data Structures

###### Subdomain: [Arrays](https://www.hackerrank.com/domains/data-structures?filters%5Bsubdomains%5D%5B%5D=arrays)
| # | Title                                            | Max Score |     Solution     | Difficulty |
|:-:|:-------------------------------------------------|:---------:|:----------------:|:-----------|
| 1 | [Arrays - DS](https://www.hackerrank.com/challenges/arrays-ds/problem) | 10 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Data%20Structures/Solutions/01%20Arrays/01%20Arrays%20-%20DS.swift) | 💚 Easy |
| 2 | [2D Array - DS](https://www.hackerrank.com/challenges/2d-array/problem) | 15 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Data%20Structures/Solutions/01%20Arrays/02%202D%20Array%20-%20DS.swift) | 💚 Easy |
| 3 | [Dynamic Array](https://www.hackerrank.com/challenges/dynamic-array/problem) | 15 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Data%20Structures/Solutions/01%20Arrays/03%20Dynamic%20Array.swift) | 💚 Easy |
| 4 | [Left Rotation](https://www.hackerrank.com/challenges/array-left-rotation/problem) | 20 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Data%20Structures/Solutions/01%20Arrays/04%20Left%20Rotation.swift) | 💚 Easy |
| 5 | [Sparse Arrays](https://www.hackerrank.com/challenges/sparse-arrays/problem) | 25 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Data%20Structures/Solutions/01%20Arrays/05%20Sparse%20Arrays.swift) | 💛 Medium |
| 6 | [Array Manipulation](https://www.hackerrank.com/challenges/crush/problem) | 60 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Data%20Structures/Solutions/01%20Arrays/06%20Array%20Manipulation.swift) | ❤️ Hard |

###### Subdomain: [Linked Lists](https://www.hackerrank.com/domains/data-structures?filters%5Bsubdomains%5D%5B%5D=linked-lists)
| # | Title                                            | Max Score |     Solution     | Difficulty |
|:-:|:-------------------------------------------------|:---------:|:----------------:|:-----------|
| 1 | [Print the Elements of a Linked List](https://www.hackerrank.com/challenges/print-the-elements-of-a-linked-list/problem) | 5 | [Solution.java](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/Problem%20Solving%20Data%20Structures/Solutions/02%20Linked%20Lists/01%20Print%20the%20Elements%20of%20a%20Linked%20List.java) | 💚 Easy |

## 30 Days of Code
| # | Title                                            | Max Score |     Solution     | Difficulty |
|:-:|:-------------------------------------------------|:---------:|:----------------:|:-----------|
| 1 | [Day 0: Hello, World.](https://www.hackerrank.com/challenges/30-hello-world/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2000%20Hello,%20World.swift) | 💚 Easy |
| 2 | [Day 1: Data Types](https://www.hackerrank.com/challenges/30-data-types/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2001%20Data%20Types.swift) | 💚 Easy |
| 3 | [Day 2: Operators](https://www.hackerrank.com/challenges/30-operators/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2002%20Operators.swift) | 💚 Easy |
| 4 | [Day 3: Intro to Conditional Statements](https://www.hackerrank.com/challenges/30-conditional-statements/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2003%20Intro%20to%20Conditional%20Statements.swift) | 💚 Easy |
| 5 | [Day 4: Class vs. Instance](https://www.hackerrank.com/challenges/30-class-vs-instance/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2004%20Class%20vs.%20Instance.swift) | 💚 Easy |
| 6 | [Day 5: Loops](https://www.hackerrank.com/challenges/30-loops/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2005%20Loops.swift) | 💚 Easy |
| 7 | [Day 6: Let's Review](https://www.hackerrank.com/challenges/30-review-loop/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2006%20Let%27s%20Review.swift) | 💚 Easy |
| 8 | [Day 7: Arrays](https://www.hackerrank.com/challenges/30-arrays/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2007%20Arrays.swift) | 💚 Easy |
| 9 | [Day 8: Dictionaries and Maps](https://www.hackerrank.com/challenges/30-dictionaries-and-maps/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2008%20Dictionaries%20and%20Maps.swift) | 💚 Easy |
| 10 | [Day 9: Recursion 3](https://www.hackerrank.com/challenges/30-recursion/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2009%20Recursion%203.swift) | 💚 Easy |
| 11 | [Day 10: Binary Numbers](https://www.hackerrank.com/challenges/30-binary-numbers/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2010%20Binary%20Numbers.swift) | 💚 Easy |
| 12 | [Day 11: 2D Arrays](https://www.hackerrank.com/challenges/30-2d-arrays/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2011%202D%20Arrays.swift) | 💚 Easy |
| 13 | [Day 12: Inheritance](https://www.hackerrank.com/challenges/30-inheritance/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2012%20Inheritance.swift) | 💚 Easy |
| 14 | [Day 13: Abstract Classes](https://www.hackerrank.com/challenges/30-abstract-classes/problem) | 30 | [Solution.java](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2013%20Abstract%20Classes.java) | 💚 Easy |
| 15 | [Day 14: Scope](https://www.hackerrank.com/challenges/30-scope/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2014%20Scope.swift) | 💚 Easy |
| 16 | [Day 15: Linked List](https://www.hackerrank.com/challenges/30-linked-list/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2015%20Linked%20List.swift) | 💚 Easy |
| 17 | [Day 16: Exceptions - String to Integer](https://www.hackerrank.com/challenges/30-exceptions-string-to-integer/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2016%20Exceptions%20-%20String%20to%20Integer.swift) | 💚 Easy |
| 18 | [Day 17: More Exceptions](https://www.hackerrank.com/challenges/30-more-exceptions/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2017%20More%20Exceptions.swift) | 💚 Easy |
| 19 | [Day 18: Queues and Stacks](https://www.hackerrank.com/challenges/30-queues-stacks/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2018%20Queues%20and%20Stacks.swift) | 💚 Easy |
| 20 | [Day 19: Interfaces](https://www.hackerrank.com/challenges/30-interfaces/problem) | 30 | [Solution.java](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2019%20Interfaces.java) | 💚 Easy |
| 21 | [Day 20: Sorting](https://www.hackerrank.com/challenges/30-sorting/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2020%20Sorting.swift) | 💚 Easy |
| 22 | [Day 21: Generics](https://www.hackerrank.com/challenges/30-generics/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2021%20Generics.swift) | 💚 Easy |
| 23 | [Day 22: Binary Search Trees](https://www.hackerrank.com/challenges/30-binary-search-trees/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2022%20Binary%20Search%20Trees.swift) | 💚 Easy |
| 24 | [Day 23: BST Level-Order Traversal](https://www.hackerrank.com/challenges/30-binary-trees/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2023%20BST%20Level-Order%20Traversal.swift) | 💚 Easy |
| 25 | [Day 24: More Linked Lists](https://www.hackerrank.com/challenges/30-linked-list-deletion/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2024%20More%20Linked%20Lists.swift) | 💚 Easy |
| 26 | [Day 25: Running Time and Complexity](https://www.hackerrank.com/challenges/30-running-time-and-complexity/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2025%20Running%20Time%20and%20Complexity.swift) | 💛 Medium |
| 27 | [Day 26: Nested Logic](https://www.hackerrank.com/challenges/30-nested-logic/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2026%20Nested%20Logic.swift) | 💚 Easy |
| 28 | [Day 27: Testing](https://www.hackerrank.com/challenges/30-testing/problem) | 30 | [Solution.java](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2027%20Testing.java) | 💚 Easy |
| 29 | [Day 28: RegEx, Patterns, and Intro to Databases](https://www.hackerrank.com/challenges/30-regex-patterns/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2028%20RegEx,%20Patterns,%20and%20Intro%20to%20Databases.swift) | 💛 Medium |
| 30 | [Day 29: Bitwise AND](https://www.hackerrank.com/challenges/30-bitwise-and/problem) | 30 | [Solution.swift](https://github.com/AleksandarDinic/HackerRank-Solutions/blob/main/30%20Days%20of%20Code/Solutions/Day%2029%20Bitwise%20AND.swift) | 💛 Medium |

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