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hackerrank-solutions

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HackerRank solutions.

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# HackerRank Solutions
Welcome to my HackerRank journey. Here are presented 172 HackerRank solutions using Java 8.

# About This Project
This project was done using Eclipse (Neon 3) IDE and Java 8.

# Profiles
### [HackerRank](https://www.hackerrank.com/charlie2634).
### [LinkedIn](https://www.linkedin.com/in/carlosjcobaledac).

# Solutions

## [Java](./src/java)

| Subdomain | Difficulty | Points | Challenge | Solution |
|:---:|:---:|:---:|:---:|:---:|
Advanced |  Easy | 010 | [Java Exception Handling (Try-catch)](https://www.hackerrank.com/challenges/java-exception-handling-try-catch/problem) | [Solution](./src/java/advanced/java_exception_handling_try_catch/Solution.java)
Advanced |  Easy | 015 | [Java Exception Handling](https://www.hackerrank.com/challenges/java-exception-handling/problem) | [Solution](./src/java/advanced/java_exception_handling/Solution.java)
Advanced |  Easy | 015 | [Java Factory Pattern](https://www.hackerrank.com/challenges/java-factory/problem) | [Solution](./src/java/advanced/java_factory_pattern/Solution.java)
Advanced |  Easy | 015 | [Java Reflection - Attributes](https://www.hackerrank.com/challenges/java-reflection-attributes/problem) | [Solution](./src/java/advanced/java_reflection/Solution.java)
Advanced |  Easy | 015 | [Java Singleton Pattern](https://www.hackerrank.com/challenges/java-singleton/problem) | [Solution](./src/java/advanced/java_singleton_pattern/Solution.java)
Advanced |  Easy | 015 | [Java Varargs - Simple Addition](https://www.hackerrank.com/challenges/simple-addition-varargs/problem) | [Solution](./src/java/advanced/java_varargs_simple_addition/Solution.java)
Advanced |  Easy | 020 | [Covariant Return Types](https://www.hackerrank.com/challenges/java-covariance/problem)| [Solution](./src/java/advanced/covariant_return_types/Solution.java)
Advanced |  Medium | 015 | [Can You Access?](https://www.hackerrank.com/challenges/can-you-access/problem) | [Solution](./src/java/advanced/can_you_access/Solution.java)
Advanced |  Medium | 025 | [Java Annotations](https://www.hackerrank.com/challenges/java-annotations/problem) | [Solution](./src/java/advanced/java_annotations/Solution.java)
Advanced |  Medium | 025 | [Prime Checker](https://www.hackerrank.com/challenges/prime-checker/problem) | [Solution](./src/java/advanced/prime_checker/Solution.java)
Advanced |  Medium | 030 | [Java Lambda Expressions](https://www.hackerrank.com/challenges/java-lambda-expressions/problem) | [Solution](./src/java/advanced/java_lambda_expressions/Solution.java)
Advanced |  Medium | 030 | [Java MD5](https://www.hackerrank.com/challenges/java-md5/problem) | [Solution](./src/java/advanced/java_md5/Solution.java)
Advanced |  Medium | 030 | [Java SHA-256](https://www.hackerrank.com/challenges/sha-256/problem) | [Solution](./src/java/advanced/java_sha_256/Solution.java)
Advanced |  Medium | 040 | [Java Visitor Pattern](https://www.hackerrank.com/challenges/java-vistor-pattern/problem) | [Solution](./src/java/advanced/java_visitorn_pattern/Solution.java)
BigNumber |  Easy | 010 | [Java BigInteger](https://www.hackerrank.com/challenges/java-biginteger/problem) | [Solution](./src/java/bignumber/java_biginteger/Solution.java)
BigNumber |  Easy | 020 | [Java Primality Test](https://www.hackerrank.com/challenges/java-primality-test/problem) | [Solution](./src/java/bignumber/primality_test/Solution.java)
BigNumber |  Medium | 020 | [Java BigDecimal](https://www.hackerrank.com/challenges/java-bigdecimal/problem) | [Solution](./src/java/bignumber/java_bigdecimal/Solution.java)
Data Structures |  Easy | 005 | [Java 1D Array](https://www.hackerrank.com/challenges/java-1d-array-introduction/problem) | [Solution](./src/java/data_structures/java_1d_array/Solution.java)
Data Structures |  Easy | 010 | [Java 2D Array](https://www.hackerrank.com/challenges/java-2d-array/problem) | [Solution](./src/java/data_structures/java_2d_array/Solution.java)
Data Structures |  Easy | 010 | [Java Arraylist](https://www.hackerrank.com/challenges/java-arraylist/submissions/code/267247340) | [Solution](./src/java/data_structures/java_arraylist/Solution.java)
Data Structures |  Easy | 010 | [Java Hashset](https://www.hackerrank.com/challenges/java-hashset/problem) | [Solution](./src/java/data_structures/java_hashset/Solution.java)
Data Structures |  Easy | 010 | [Java Map](https://www.hackerrank.com/challenges/phone-book/problem) | [Solution](./src/java/data_structures/java_map/Solution.java)
Data Structures |  Easy | 010 | [Java Sort](https://www.hackerrank.com/challenges/java-sort/problem) | [Solution](./src/java/data_structures/java_sort/Solution.java)
Data Structures |  Easy | 010 | [Java Subarray](https://www.hackerrank.com/challenges/java-negative-subarray/problem) | [Solution](./src/java/data_structures/java_subarray/Solution.java)
Data Structures |  Easy | 015 | [Java Generics](https://www.hackerrank.com/challenges/java-generics/problem) | [Solution](./src/java/data_structures/java_generics/Solution.java)
Data Structures |  Easy | 015 | [Java List](https://www.hackerrank.com/challenges/java-list/problem) | [Solution](./src/java/data_structures/java_list/Solution.java)
Data Structures |  Easy | 020 | [Java BitSet](https://www.hackerrank.com/challenges/java-bitset/problem) | [Solution](./src/java/data_structures/java_bitset/Solution.java)
Data Structures |  Medium | 010 | [Java Comparator](https://www.hackerrank.com/challenges/java-comparator/problem) | [Solution](./src/java/data_structures/java_comparator/Solution.java)
Data Structures |  Medium | 020 | [Java Dequeue](https://www.hackerrank.com/challenges/java-dequeue/problem) | [Solution](./src/java/data_structures/java_dequeue/Solution.java)
Data Structures |  Medium | 020 | [Java Priority Queue](https://www.hackerrank.com/challenges/java-priority-queue/problem) | [Solution](./src/java/data_structures/java_priority_queue/Solution.java)
Data Structures |  Medium | 020 | [Java Stack](https://www.hackerrank.com/challenges/java-stack/problem) | [Solution](./src/java/data_structures/java_stack/Solution.java)
Data Structures |  Medium | 025 | [Java 1D Array (Part 2)](https://www.hackerrank.com/challenges/java-1d-array/problem) | [Solution](./src/java/data_structures/java_1d_array_part_2/Solution.java)
Introduction |  Easy | 003 | [Welcome to Java!](https://www.hackerrank.com/challenges/welcome-to-java/problem) | [Solution](./src/java/introduction/welcome_to_java/Solution.java)
Introduction |  Easy | 005 | [Java Stdin and Stdout I](https://www.hackerrank.com/challenges/java-stdin-and-stdout-1/problem) | [Solution](./src/java/introduction/java_stdin_and_stdout_I/Solution.java)
Introduction |  Easy | 010 | [Java Datatypes](https://www.hackerrank.com/challenges/java-datatypes/problem) | [Solution](./src/java/introduction/java_datatypes/Solution.java)
Introduction |  Easy | 010 | [Java End-of-file](https://www.hackerrank.com/challenges/java-end-of-file/problem) | [Solution](./src/java/introduction/java_end_of_file/Solution.java)
Introduction |  Easy | 010 | [Java If-Else](https://www.hackerrank.com/challenges/java-if-else/problem) | [Solution](./src/java/introduction/java_if_else/Solution.java)
Introduction |  Easy | 010 | [Java Int to String](https://www.hackerrank.com/challenges/java-int-to-string/problem) | [Solution](./src/java/introduction/java_int_to_string/Solution.java)
Introduction |  Easy | 010 | [Java Loops II](https://www.hackerrank.com/challenges/java-loops/problem) | [Solution](./src/java/introduction/java_loops_II/Solution.java)
Introduction |  Easy | 010 | [Java Loops I](https://www.hackerrank.com/challenges/java-loops-i/problem) | [Solution](./src/java/introduction/java_loops_I/Solution.java)
Introduction |  Easy | 010 | [Java Output Formatting](https://www.hackerrank.com/challenges/java-output-formatting/problem) | [Solution](./src/java/introduction/java_output_formatting/Solution.java)
Introduction |  Easy | 010 | [Java Static Initializer Block](https://www.hackerrank.com/challenges/java-static-initializer-block/problem) | [Solution](./src/java/introduction/java_static_initializer_block/Solution.java)
Introduction |  Easy | 010 | [Java Stdin and Stdout II](https://www.hackerrank.com/challenges/java-stdin-stdout/problem) | [Solution](./src/java/introduction/java_stdin_and_stdout_II/Solution.java)
Introduction |  Easy | 015 | [Java Currency Formatter](https://www.hackerrank.com/challenges/java-currency-formatter/problem) | [Solution](./src/java/introduction/java_currency_formatter/Solution.java)
Introduction |  Easy | 015 | [Java Date and Time](https://www.hackerrank.com/challenges/java-date-and-time/problem) | [Solution](./src/java/introduction/java_date_and_time/Solution.java)
Object Oriented Programming |  Easy | 005 | [Java Inheritance I](https://www.hackerrank.com/challenges/java-inheritance-1/problem) | [Solution](./src/java/object_oriented_programming/java_inheritance_i/Solution.java)
Object Oriented Programming |  Easy | 010 | [Java Abstract Class](https://www.hackerrank.com/challenges/java-abstract-class/problem) | [Solution](./src/java/object_oriented_programming/java_abstract_class/Solution.java)
Object Oriented Programming |  Easy | 010 | [Java Inheritance II](https://www.hackerrank.com/challenges/java-inheritance-2/problem) | [Solution](./src/java/object_oriented_programming/java_inheritance_ii/Solution.java)
Object Oriented Programming |  Easy | 010 | [Java Instanceof keyword](https://www.hackerrank.com/challenges/java-instanceof-keyword/problem) | [Solution](./src/java/object_oriented_programming/java_instanceof_keyword/Solution.java)
Object Oriented Programming |  Easy | 010 | [Java Interface](https://www.hackerrank.com/challenges/java-interface/problem) | [Solution](./src/java/object_oriented_programming/java_interface/Solution.java)
Object Oriented Programming |  Easy | 010 | [Java Method Overriding 2 (Super Keyword)](https://www.hackerrank.com/challenges/java-method-overriding-2-super-keyword/problem) | [Solution](./src/java/object_oriented_programming/java_method_overriding_2/Solution.java)
Object Oriented Programming |  Easy | 010 | [Java Method Overriding](https://www.hackerrank.com/challenges/java-method-overriding/problem) | [Solution](./src/java/object_oriented_programming/java_method_overriding/Solution.java)
Object Oriented Programming |  Easy | 015 | [Java Iterator](https://www.hackerrank.com/challenges/java-iterator/problem) | [Solution](./src/java/object_oriented_programming/java_iterator/Solution.java)
Strings |  Easy | 005 | [Java Strings Introduction](https://www.hackerrank.com/challenges/java-strings-introduction/problem) | [Solution](./src/java/strings/java_strings_introduction/Solution.java)
Strings |  Easy | 005 | [Java Substring](https://www.hackerrank.com/challenges/java-substring/problem) | [Solution](./src/java/strings/java_substring/Solution.java)
Strings |  Easy | 010 | [Java Anagrams](https://www.hackerrank.com/challenges/java-anagrams/problem) | [Solution](./src/java/strings/java_anagrams/Solution.java)
Strings |  Easy | 010 | [Java String Reverse](https://www.hackerrank.com/challenges/java-string-reverse/problem) | [Solution](./src/java/strings/java_string_reverse/Solution.java)
Strings |  Easy | 010 | [Java Substring Comparisons](https://www.hackerrank.com/challenges/java-string-compare/problem) | [Solution](./src/java/strings/java_substring_comparisons/Solution.java)
Strings |  Easy | 015 | [Java String Tokens](https://www.hackerrank.com/challenges/java-string-tokens/problem) | [Solution](./src/java/strings/java_string_tokens/Solution.java)
Strings |  Easy | 020 | [Pattern Syntax Checker](https://www.hackerrank.com/challenges/pattern-syntax-checker/problem) | [Solution](./src/java/strings/pattern_syntax_checker/Solution.java)
Strings |  Easy | 020 | [Valid Username Regular Expression](https://www.hackerrank.com/challenges/valid-username-checker/problem) | [Solution](./src/java/strings/valid_username_regular_expression/Solution.java)
Strings |  Medium | 020 | [Tag Content Extractor](https://www.hackerrank.com/challenges/tag-content-extractor/problem) | [Solution](./src/java/strings/tag_content_extractor/Solution.java)
Strings |  Medium | 025 | [Java Regex 2 - Duplicate Words](https://www.hackerrank.com/challenges/duplicate-word/problem) | [Solution](./src/java/strings/java_regex_2_duplicate_word/Solution.java)
Strings |  Medium | 025 | [Java Regex](https://www.hackerrank.com/challenges/java-regex/problem) | [Solution](./src/java/strings/java_regex/Solution.java)

## [Algorithms](./src/algorithms)

| Subdomain | Difficulty | Points | Challenge | Solution |
|:---:|:---:|:---:|:---:|:---:|
Game Theory |  Medium |  070 | [Chocolate in Box](https://www.hackerrank.com/challenges/chocolate-in-box/problem) | [Solution](./src/algorithms/game_theory/chocolate_in_box/Solution.java)
Implementation |  Easy | 010 | [Apple and Orange](https://www.hackerrank.com/challenges/apple-and-orange/problem) | [Solution](./src/algorithms/implementation/apple_and_orange/Solution.java)
Implementation |  Easy | 010 | [Between Two Sets](https://www.hackerrank.com/challenges/between-two-sets/problem) | [Solution](./src/algorithms/implementation/between_two_sets/Solution.java)
Implementation |  Easy | 010 | [Bill Division](https://www.hackerrank.com/challenges/bon-appetit/problem) | [Solution](./src/algorithms/implementation/bill_division/Solution.java)
Implementation |  Easy | 010 | [Breaking the Records](https://www.hackerrank.com/challenges/breaking-best-and-worst-records/problem) | [Solution](./src/algorithms/implementation/breaking_the_records/Solution.java)
Implementation |  Easy | 010 | [Divisible Sum Pairs](https://www.hackerrank.com/challenges/divisible-sum-pairs/problem) | [Solution](./src/algorithms/implementation/divisible_sum_pairs/Solution.java)
Implementation |  Easy | 010 | [Drawing Book](https://www.hackerrank.com/challenges/drawing-book/problem) | [Solution](./src/algorithms/implementation/drawing_book/Solution.java)
Implementation |  Easy | 010 | [Grading Students](https://www.hackerrank.com/challenges/grading/problem)| [Solution](./src/algorithms/implementation/grading_students/Solution.java)
Implementation |  Easy | 010 | [Migratory Birds](https://www.hackerrank.com/challenges/migratory-birds/problem) | [Solution](./src/algorithms/implementation/migratory_birds/Solution.java)
Implementation |  Easy | 010 | [Number Line Jumps](https://www.hackerrank.com/challenges/kangaroo/problem) | [Solution](./src/algorithms/implementation/number_line_jumps/Solution.java)
Implementation |  Easy | 010 | [Sales by Match](https://www.hackerrank.com/challenges/sock-merchant/problem) | [Solution](./src/algorithms/implementation/sales_by_match/Solution.java)
Implementation |  Easy | 010 | [Subarray Division](https://www.hackerrank.com/challenges/the-birthday-bar/problem) | [Solution](./src/algorithms/implementation/subarray_division/Solution.java)
Implementation |  Easy | 015 | [Beautiful Days at the Movies](https://www.hackerrank.com/challenges/beautiful-days-at-the-movies/problem) | [Solution](./src/algorithms/implementation/beautiful_days_at_the_movies/Solution.java)
Implementation |  Easy | 015 | [Cats and a Mouse](https://www.hackerrank.com/challenges/cats-and-a-mouse/problem) | [Solution](./src/algorithms/implementation/cat_and_mouse/Solution.java)
Implementation |  Easy | 015 | [Counting Valleys](https://www.hackerrank.com/challenges/counting-valleys/problem) | [Solution](./src/algorithms/implementation/counting_valleys/Solution.java)
Implementation |  Easy | 015 | [Day of the Programmer](https://www.hackerrank.com/challenges/day-of-the-programmer/problem) | [Solution](./src/algorithms/implementation/day_of_the_programmer/Solution.java)
Implementation |  Easy | 015 | [Electronics Shop](https://www.hackerrank.com/challenges/electronics-shop/problem) | [Solution](./src/algorithms/implementation/electronics_shop/Solution.java)
Implementation |  Easy | 015 | [Jumping on the Clouds: Revisited](https://www.hackerrank.com/challenges/jumping-on-the-clouds-revisited/problem) | [Solution](./src/algorithms/implementation/jumping_on_the_clouds_revisited/Solution.java)
Implementation |  Easy | 015 | [Library Fine](https://www.hackerrank.com/challenges/library-fine/problem) | [Solution](./src/algorithms/implementation/library_fine/Solution.java)
Implementation |  Easy | 015 | [Save the Prisoner!](https://www.hackerrank.com/challenges/save-the-prisoner/problem) | [Solution](./src/algorithms/implementation/save_the_prisoner/Solution.java)
Implementation |  Easy | 015 | [The Hurdle Race](https://www.hackerrank.com/challenges/the-hurdle-race/problem) | [Solution](./src/algorithms/implementation/the_hurdle_race/Solution.java)
Implementation |  Easy | 015 | [Viral Advertising](https://www.hackerrank.com/challenges/strange-advertising/problem) | [Solution](./src/algorithms/implementation/viral_advertising/Solution.java)
Implementation |  Easy | 020 | [Angry Professor](https://www.hackerrank.com/challenges/angry-professor/problem) | [Solution](./src/algorithms/implementation/angry_professor/Solution.java)
Implementation |  Easy | 020 | [Append and Delete](https://www.hackerrank.com/challenges/append-and-delete/problem) | [Solution](./src/algorithms/implementation/append_and_delete/Solution.java)
Implementation |  Easy | 020 | [Beautiful Triplets](hackerrank.com/challenges/beautiful-triplets/problem) | [Solution](./src/algorithms/implementation/beautiful_triplets/Solution.java)
Implementation |  Easy | 020 | [Circular Array Rotation](https://www.hackerrank.com/challenges/circular-array-rotation/problem) | [Solution](./src/algorithms/implementation/circular_array_rotation/Solution.java)
Implementation |  Easy | 020 | [Designer PDF Viewer](https://www.hackerrank.com/challenges/designer-pdf-viewer/problem) | [Solution](./src/algorithms/implementation/designer_pdf_viewer/Solution.java)
Implementation |  Easy | 020 | [Equalize the Array](https://www.hackerrank.com/challenges/equality-in-a-array/problem) | [Solution](./src/algorithms/implementation/equalize_the_array/Solution.java)
Implementation |  Easy | 020 | [Jumping on the Clouds](https://www.hackerrank.com/challenges/jumping-on-the-clouds/problem) | [Solution](./src/algorithms/implementation/jumping_on_the_clouds/Solution.java)
Implementation |  Easy | 020 | [Picking Numbers](https://www.hackerrank.com/challenges/picking-numbers/problem) | [Solution](./src/algorithms/implementation/picking_numbers/Solution.java)
Implementation |  Easy | 020 | [Repeated String](https://www.hackerrank.com/challenges/repeated-string/problem) | [Solution](./src/algorithms/implementation/repeated_string/Solution.java)
Implementation |  Easy | 020 | [Sequence Equation](https://www.hackerrank.com/challenges/permutation-equation/problem) | [Solution](./src/algorithms/implementation/sequence_equation/Solution.java)
Implementation |  Easy | 020 | [Service Lane](https://www.hackerrank.com/challenges/service-lane/problem) | [Solution](./src/algorithms/implementation/service_lane/Solution.java)
Implementation |  Easy | 020 | [Sherlock and Squares](https://www.hackerrank.com/challenges/sherlock-and-squares/problem) | [Solution](./src/algorithms/implementation/sherlock_and_squares/Solution.java)
Implementation |  Easy | 020 | [Utopian Tree](https://www.hackerrank.com/challenges/utopian-tree/problem) | [Solution](./src/algorithms/implementation/utopian_tree/Solution.java)
Implementation |  Easy | 025 | [ACM ICPC Team](https://www.hackerrank.com/challenges/acm-icpc-team/problem) | [Solution](./src/algorithms/implementation/acm_icpc_team/Solution.java)
Implementation |  Easy | 025 | [Chocolate Feast](https://www.hackerrank.com/challenges/chocolate-feast/problem) | [Solution](./src/algorithms/implementation/chocolate_feast/Solution.java)
Implementation |  Easy | 025 | [Cut the sticks](https://www.hackerrank.com/challenges/cut-the-sticks/problem) | [Solution](./src/algorithms/implementation/cut_the_sticks/Solution.java)
Implementation |  Easy | 025 | [Find Digits](https://www.hackerrank.com/challenges/find-digits/problem) | [Solution](./src/algorithms/implementation/find_digits/Solution.java)
Implementation |  Easy | 025 | [Taum and B'day](https://www.hackerrank.com/challenges/taum-and-bday/problem) | [Solution](./src/algorithms/implementation/taum_and_b_day/Solution.java)
Implementation |  Easy | 030 | [Modified Kaprekar Numbers](https://www.hackerrank.com/challenges/kaprekar-numbers/problem) | [Solution](./src/algorithms/implementation/modified_kaprekar_numbers/Solution.java)
Implementation |  Medium | 020 | [Climbing the Leaderboard](https://www.hackerrank.com/challenges/climbing-the-leaderboard/problem) | [Solution](./src/algorithms/implementation/climbing_the_leaderboard/Solution.java)
Implementation |  Medium | 020 | [Extra Long Factorials](https://www.hackerrank.com/challenges/extra-long-factorials/problem) | [Solution](./src/algorithms/implementation/extra_long_factorials/Solution.java)
Implementation |  Medium | 020 | [Forming a Magic Square](https://www.hackerrank.com/challenges/magic-square-forming/problem) | [Solution](./src/algorithms/implementation/forming_a_magic_square/Solution.java)
Implementation |  Medium | 020 | [Non-Divisible Subset](https://www.hackerrank.com/challenges/non-divisible-subset/problem) | [Solution](./src/algorithms/implementation/non_divisible_subset/Solution.java)
Implementation |  Medium | 025 | [The Time in Words](https://www.hackerrank.com/challenges/the-time-in-words/problem) | [Solution](./src/algorithms/implementation/the_time_in_words/Solution.java)
Implementation |  Medium | 030 | [3D Surface Area](https://www.hackerrank.com/challenges/3d-surface-area/problem) | [Solution](./src/algorithms/implementation/surface_area_3d/Solution.java)
Implementation |  Medium | 030 | [Encryption](https://www.hackerrank.com/challenges/encryption/problem) | [Solution](./src/algorithms/implementation/encryption/Solution.java)
Implementation |  Medium | 030 | [Organizing Containers of Balls](https://www.hackerrank.com/challenges/organizing-containers-of-balls/problem) | [Solution](./src/algorithms/implementation/organizing_containers_of_balls/Solution.java)
Implementation |  Medium | 030 | [Queen's Attack II](https://www.hackerrank.com/challenges/queens-attack-2/problem) | [Solution](./src/algorithms/implementation/queen_s_attack_ii/Solution.java)
Implementation |  Medium | 030 | [The Grid Search](https://www.hackerrank.com/challenges/the-grid-search/problem) | [Solution](./src/algorithms/implementation/the_grid_search/Solution.java)
Implementation |  Medium | 035 | [Bigger is Greater](https://www.hackerrank.com/challenges/bigger-is-greater/problem) | [Solution](./src/algorithms/implementation/bigger_is_greater/Solution.java)
Implementation |  Medium | 040 | [Absolute Permutation](https://www.hackerrank.com/challenges/absolute-permutation/problem) | [Solution](./src/algorithms/implementation/absolute_permutation/Solution.java)
Implementation |  Medium | 040 | [Ema's Supercomputer](https://www.hackerrank.com/challenges/two-pluses/problem) | [Solution](./src/algorithms/implementation/emma_s_supercomputer/Solution.java)
Implementation |  Medium | 040 | [Larry's Array](https://www.hackerrank.com/challenges/larrys-array/problem) | [Solution](./src/algorithms/implementation/larry_s_array/Solution.java)
Implementation |  Medium | 040 | [The Bomberman Game](https://www.hackerrank.com/challenges/bomber-man/problem) | [Solution](./src/algorithms/implementation/the_bomberman_game/Solution.java)
Implementation |  Medium | 050 | [Almost Sorted](https://www.hackerrank.com/challenges/almost-sorted/problem) | [Solution](./src/algorithms/implementation/almost_sorted/Solution.java)
Implementation |  Hard | 080 | [Matrix Layer Rotation](https://www.hackerrank.com/challenges/matrix-rotation-algo/problem) | [Solution](./src/algorithms/implementation/matrix_layer_rotation/Solution.java)
Implementation |  Expert | 100 | [Palindromic Border](https://www.hackerrank.com/challenges/palindromic-border/problem) | [Solution](./src/algorithms/implementation/palindromic_border/Solution.java)
Recursion |  Medium | 020 | [The Power Sum](https://www.hackerrank.com/challenges/the-power-sum/problem) | [Solution](./src/algorithms/recursion/the_power_sum/Solution.java)
Recursion |  Medium | 030 | [Crossword Puzzle](https://www.hackerrank.com/challenges/crossword-puzzle/problem) | [Solution](./src/algorithms/recursion/crossword_puzzle/Solution.java)
Recursion |  Medium | 030 | [Recursive Digit Sum](https://www.hackerrank.com/challenges/recursive-digit-sum/problem) | [Solution](./src/algorithms/recursion/recursive_digit_sum/Solution.java)
Recursion |  Medium | 040 | [Password Cracker](https://www.hackerrank.com/challenges/password-cracker/problem) | [Solution](./src/algorithms/recursion/password_cracker/Solution.java)
Recursion |  Medium | 050 | [Stone Division, Revisited](https://www.hackerrank.com/challenges/stone-division-2/problem) | [Solution](./src/algorithms/recursion/stone_division_revisited/Solution.java)
Recursion |  Hard | 040 | [Arithmetic Expressions](https://www.hackerrank.com/challenges/arithmetic-expressions/problem) | [Solution](./src/algorithms/recursion/arithmetic_expressions/Solution.java)
Recursion |  Hard | 050 | [K Factorization](https://www.hackerrank.com/challenges/k-factorization/problem) | [Solution](./src/algorithms/recursion/k_factorization/Solution.java)
Recursion |  Hard | 060 | [Bowling Pins](https://www.hackerrank.com/challenges/bowling-pins/problem) | [Solution](./src/algorithms/recursion/bowling_pins/Solution.java)
Search |  Medium | 050 | [Connected Cells in a Grid](https://www.hackerrank.com/challenges/connected-cell-in-a-grid/problem) | [Solution](./src/algorithms/search/connected_cells_in_a_grid/Solution.java)
Search |  Medium | 050 | [Pairs](https://www.hackerrank.com/challenges/pairs/problem) | [Solution](./src/algorithms/search/pairs/Solution.java)
Sorting |  Medium | 040 | [Fraudulent Activity Notifications](https://www.hackerrank.com/challenges/fraudulent-activity-notifications/problem) | [Solution](./src/algorithms/sorting/fraudulent_activity_notifications/Solution.java)
Sorting |  Medium | 040 | [Lily's Homework](https://www.hackerrank.com/challenges/lilys-homework/problem) | [Solution](./src/algorithms/sorting/lily_s_homework/Solution.java)
Sorting |  Medium | 040 | [The Full Counting Sort](https://www.hackerrank.com/challenges/countingsort4/problem) | [Solution](./src/algorithms/sorting/the_full_counting_sort/Solution.java)
Strings |  Easy | 015 | [CamelCase](https://www.hackerrank.com/challenges/camelcase/problem) | [Solution](./src/algorithms/strings/camelcase/Solution.java)
Strings |  Medium | 030 | [Highest Value Palindrome](https://www.hackerrank.com/challenges/richie-rich/problem) | [Solution](./src/algorithms/strings/highest_value_palindrome/Solution.java)
Strings |  Medium | 035 | [Sherlock and the Valid String](https://www.hackerrank.com/challenges/sherlock-and-valid-string/problem) | [Solution](./src/algorithms/strings/sherlock_and_the_valid_string/Solution.java)
Strings |  Medium | 050 | [Sherlock and Anagrams](https://www.hackerrank.com/challenges/sherlock-and-anagrams/problem) | [Solution](./src/algorithms/strings/sherlock_and_anagrams/Solution.java)
Strings |  Expert | 036.36 | [Two Strings Game](https://www.hackerrank.com/challenges/two-strings-game/problem) | [Solution](./src/algorithms/strings/two_strings_game/Solution.java)
Warmup |  Easy | 001 | [Solve Me First](https://www.hackerrank.com/challenges/solve-me-first/problem) | [Solution](./src/algorithms/warmup/solve_me_first/Solution.java)
Warmup |  Easy | 010 | [A Very Big Sum](https://www.hackerrank.com/challenges/a-very-big-sum/problem) | [Solution](./src/algorithms/warmup/a_very_big_sum/Solution.java)
Warmup |  Easy | 010 | [Birthday Cake Candles](https://www.hackerrank.com/challenges/birthday-cake-candles/problem) | [Solution](./src/algorithms/warmup/birthday_cake_candles/Solution.java)
Warmup |  Easy | 010 | [Compare the Triplets](https://www.hackerrank.com/challenges/compare-the-triplets/problem) | [Solution](./src/algorithms/warmup/compare_the_triplets/Solution.java)
Warmup |  Easy | 010 | [Diagonal Difference](https://www.hackerrank.com/challenges/diagonal-difference/problem) | [Solution](./src/algorithms/warmup/diagonal_difference/Solution.java)
Warmup |  Easy | 010 | [Mini-Max Sum](https://www.hackerrank.com/challenges/mini-max-sum/problem) | [Solution](./src/algorithms/warmup/mini_max_sum/Solution.java)
Warmup |  Easy | 010 | [Plus Minus](https://www.hackerrank.com/challenges/plus-minus/problem) | [Solution](./src/algorithms/warmup/plus_minus/Solution.java)
Warmup |  Easy | 010 | [Simple Array Sum](https://www.hackerrank.com/challenges/simple-array-sum/problem) | [Solution](./src/algorithms/warmup/simple_array_sum/Solution.java)
Warmup |  Easy | 010 | [Staircase](https://www.hackerrank.com/challenges/staircase/problem) | [Solution](./src/algorithms/warmup/staircase/Solution.java)
Warmup |  Easy | 015 | [Time Conversion](https://www.hackerrank.com/challenges/time-conversion/problem) | [Solution](./src/algorithms/warmup/time_conversion/Solution.java)

## [1 Week Preparation Kit](./src/one_week_preparation_kit)

### Exercises
| Day | Difficulty | Challenge | Solution |
|:---:|:---:|:---:|:---:|
Day 1 |  Easy | [Mini-Max Sum](https://www.hackerrank.com/challenges/one-week-preparation-kit-mini-max-sum/problem) | [Solution](./src/one_week_preparation_kit/day_a/min_max_sum/Solution.java)
Day 1 |  Easy | [Plus Minus](https://www.hackerrank.com/challenges/one-week-preparation-kit-plus-minus/problem) | [Solution](./src/one_week_preparation_kit/day_a/plus_minus/Solution.java)
Day 1 |  Easy | [Time Conversion](https://www.hackerrank.com/challenges/one-week-preparation-kit-time-conversion/problem) | [Solution](./src/one_week_preparation_kit/day_a/time_conversion/Solution.java)
Day 2 |  Easy | [Counting Sort 1](https://www.hackerrank.com/challenges/one-week-preparation-kit-countingsort1/problem) | [Solution](./src/one_week_preparation_kit/day_b/counting_sort_a/Solution.java)
Day 2 |  Easy | [Diagonal Difference](https://www.hackerrank.com/challenges/one-week-preparation-kit-diagonal-difference/problem) | [Solution](./src/one_week_preparation_kit/day_b/diagonal_difference/Solution.java)
Day 2 |  Easy | [Lonely Integer](https://www.hackerrank.com/challenges/one-week-preparation-kit-lonely-integer/problem) | [Solution](./src/one_week_preparation_kit/day_b/lonely_integer/Solution.java)
Day 3 |  Easy | [Caesar Cipher](https://www.hackerrank.com/challenges/one-week-preparation-kit-caesar-cipher-1/problem) | [Solution](./src/one_week_preparation_kit/day_c/caesar_cipher/Solution.java)
Day 3 |  Easy | [Tower Breakers](https://www.hackerrank.com/challenges/one-week-preparation-kit-tower-breakers-1/problem) | [Solution](./src/one_week_preparation_kit/day_c/tower_breakers/Solution.java)
Day 3 |  Easy | [Zig Zag Sequence](https://www.hackerrank.com/challenges/one-week-preparation-kit-zig-zag-sequence/problem) | [Solution](./src/one_week_preparation_kit/day_c/zig_zag_sequence/Solution.java)
Day 4 |  Easy | [Grid Challenge](https://www.hackerrank.com/challenges/one-week-preparation-kit-grid-challenge/problem) | [Solution](./src/one_week_preparation_kit/day_d/grid_challenge/Solution.java)
Day 4 |  Easy | [New Year Chaos](https://www.hackerrank.com/challenges/one-week-preparation-kit-new-year-chaos/problem) | [Solution](./src/one_week_preparation_kit/day_d/new_year_chaos/Solution.java)
Day 4 |  Easy | [Recursive Digit Sum](https://www.hackerrank.com/challenges/one-week-preparation-kit-recursive-digit-sum/problem) | [Solution](./src/one_week_preparation_kit/day_d/recursive_digit_sum/Solution.java)
Day 5 |  Medium | [Balanced Brackets](https://www.hackerrank.com/challenges/one-week-preparation-kit-balanced-brackets/problem) | [Solution](./src/one_week_preparation_kit/day_e/balanced_brackets/Solution.java)
Day 5 |  Medium | [Merge two sorted linked lists](https://www.hackerrank.com/challenges/one-week-preparation-kit-merge-two-sorted-linked-lists/problem) | [Solution](./src/one_week_preparation_kit/day_e/merge_two_sorted_linked_lists/Solution.java)
Day 5 |  Medium | [Queue using Two Stacks](https://www.hackerrank.com/challenges/one-week-preparation-kit-queue-using-two-stacks/problem) | [Solution](./src/one_week_preparation_kit/day_e/queue_using_two_stacks/Solution.java)
Day 6 |  Medium | [Simple Text Editor](https://www.hackerrank.com/challenges/one-week-preparation-kit-simple-text-editor/problem) | [Solution](./src/one_week_preparation_kit/day_f/simple_text_editor/Solution.java)

# Important
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