{"id":26291219,"url":"https://github.com/harsh971/hackerrank_solutions","last_synced_at":"2025-05-08T01:41:15.954Z","repository":{"id":37559413,"uuid":"491268438","full_name":"Harsh971/HackerRank_Solutions","owner":"Harsh971","description":"Here you will get All Solutions for Topics from HackerRank 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align=\"center\"\u003e\n  \u003ca href=\"https://www.hackerrank.com/harshthakkar09?hr_r=1\"\u003e\n    \u003cimg alt=\"HackerRank\" height=\"50%\" width=\"50%\"  src=\"https://camo.githubusercontent.com/49e713e1463692beaff7b552eb60511454485659f6131286eeab9db84e91840a/68747470733a2f2f69302e77702e636f6d2f6772616473696e67616d65732e636f6d2f77702d636f6e74656e742f75706c6f6164732f323031362f30352f3835363737315f3636383232343035333139373834315f313934333639393030395f6f2e706e67\"\u003e\n  \u003c/a\u003e\n\u003c/p\u003e\n\n# HackerRank_Solutions\n\nHere you will get All Solutions for Topics from HackerRank Platform\n\n\n\n\n## 🛠 Skills Used in this Repository...\n \u003ca href=\"https://www.cprogramming.com/\" target=\"_blank\" rel=\"noreferrer\"\u003e \u003cimg src=\"https://raw.githubusercontent.com/devicons/devicon/master/icons/c/c-original.svg\" alt=\"c\" height=\"50\" width=\"50\"/\u003e \u003c/a\u003e \n   \u0026nbsp;\u0026nbsp;\n \u003ca href=\"https://www.w3schools.com/cpp/\" target=\"_blank\" rel=\"noreferrer\"\u003e \u003cimg src=\"https://raw.githubusercontent.com/devicons/devicon/master/icons/cplusplus/cplusplus-original.svg\" alt=\"cplusplus\" height=\"50\" width=\"50\"/\u003e \u003c/a\u003e\n   \u0026nbsp;\u0026nbsp;\n  \u003ca href=\"https://www.java.com\" target=\"_blank\" rel=\"noreferrer\"\u003e \u003cimg src=\"https://raw.githubusercontent.com/devicons/devicon/master/icons/java/java-original.svg\" alt=\"java\" height=\"50\" width=\"50\"/\u003e \u003c/a\u003e\n   \u0026nbsp;\u0026nbsp;\n   \u003ca href=\"https://www.python.org\" target=\"_blank\" rel=\"noreferrer\"\u003e \u003cimg src=\"https://raw.githubusercontent.com/devicons/devicon/master/icons/python/python-original.svg\" alt=\"python\" height=\"50\" width=\"50\"/\u003e \u003c/a\u003e\n\n\n## Topics Covered...\n\n- [30 Day's Of Code](#30-days-of-code)\n- [C](#c)\n- [JAVA](#java)\n\n\n\n\n## 30 Day's of Code\n\n\n\n\n| Day | Problem Name     |Difficulty Level| HackerRank Panel Link                       |Solution|Solution Available Using |\n| :-: | :-: |:-:| :-: | :-:|:-:|\n| 0      | Hello, World. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-hello-world/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/0%20-%20Hello%20World)|C , C++ , JAVA , Python|\n| 1      | Data Types. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-data-types/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/1%20-%20Data%20Types)|C , C++ , JAVA , Python|\n| 2      | Operators. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-operators/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/2%20-%20Operators)|C , C++ , JAVA , Python|\n| 3      | Intro to Conditional Statements. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-conditional-statements/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/3%20-%20Intro%20to%20Conditional%20Statements)|C , C++ , JAVA , Python|\n| 4      | Class vs. Instance | Easy|[Click Here](https://www.hackerrank.com/challenges/30-class-vs-instance/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/4%20-%20Class%20vs%20Interface)|C++ , JAVA , Python|\n| 5      | Loops. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-loops?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/5%20-%20Loops)|C , C++ , JAVA , Python|\n| 6      | Let's Review. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-review-loop?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/6%20-%20Let's%20Review)|C , C++ , JAVA , Python|\n| 7      | Arrays. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-arrays?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/7%20-%20Arrays)|C , C++ , JAVA , Python|\n| 8      | Dictionaries and Maps. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-dictionaries-and-maps?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/8%20-%20Dictionaries%20and%20Maps)|C , C++ , JAVA , Python|\n| 9      | Recursion 3. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-recursion?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/9%20-%20Recursion)|C , C++ , JAVA , Python|\n| 10      | Binary Numbers. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-binary-numbers?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/10%20-%20Binary%20Numbers)|C , C++ , JAVA , Python|\n| 11      | 2D Arrays. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-2d-arrays?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/11%20-%202D%20Arrays)|C , C++ , JAVA , Python|\n| 12      | Inheritance. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-inheritance?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/12%20-%20Inheritance)|C++ , JAVA , Python|\n| 13      | Abstract Classes. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-abstract-classes?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/13%20-%20Abstract%20Classes)|C++ , JAVA , Python|\n| 14      | Scope. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-scope?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/14%20-%20Scope)|C++ , JAVA , Python|\n| 15      | Linked List. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-linked-list?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/15%20-%20Linked%20List)|C , JAVA , Python|\n| 16      | Exceptions - String to Integer. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-exceptions-string-to-integer?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/16%20-%20Exception%20:%20String%20to%20Integer)|C++ , JAVA , Python|\n| 17      | More Exceptions. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-more-exceptions?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/17%20-%20More%20Exceptions)|C++ , JAVA , Python|\n| 18      | Queues and Stacks. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-queues-stacks?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/18%20-%20Queues%20and%20Stacks)|C++ , JAVA|\n| 19      | Interfaces. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-interfaces?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/19%20-%20Interfaces)|C++ , JAVA , Python|\n| 20      | Sorting. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-sorting?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/20%20-%20Sorting)|C , C++ , JAVA , Python|\n| 21      | Generics. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-generics?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/21%20-%20Generics)|C++ , JAVA|\n| 22      | Binary Search Trees. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-binary-search-trees?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/22%20-%20Binary%20Search%20Trees)|C , C++ , JAVA , Python|\n| 23      | BST Level Order Traversal | Easy|[Click Here](https://www.hackerrank.com/challenges/30-binary-trees?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/23%20-%20BST%20Level%20Order%20Traversal)|C , C++ , JAVA|\n| 24      | More Linked Lists. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-linked-list-deletion?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/24%20-%20More%20Linked%20List)|C , C++ , JAVA , Python|\n| 25      | Running Time and Complexity. | Medium|[Click Here](https://www.hackerrank.com/challenges/30-running-time-and-complexity?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/25%20-%20Running%20Time%20and%20Complexity)|C , C++ , JAVA , Python|\n| 26      | Nested Logic. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-nested-logic?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/26%20-%20Nested%20Logic)|C , C++ , JAVA , Python|\n| 27      | Testing. | Easy|[Click Here](https://www.hackerrank.com/challenges/30-testing?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/27%20-%20Testing)|C++ , JAVA , Python|\n| 28      | RegEx, Patterns, and Intro to Databases. | Medium|[Click Here](https://www.hackerrank.com/challenges/30-regex-patterns?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/28%20-%20RegEx%2C%20Patterns%2C%20and%20Intro%20to%20Databases)|C , C++ , JAVA , Python|\n| 29      | Bitwise AND. | Medium|[Click Here](https://www.hackerrank.com/challenges/30-bitwise-and?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Tutorials/30%20Days%20of%20Code/29%20-%20Bitwise%20AND)|C , C++ , JAVA , Python|\n\n\n\n\n\n## C\n\n\n\n\n\n|    | Problem Name        |SubDomain   |Difficulty Level|HackerRank Panel Link                                                                       |Solution         |\n| :-:| :-:                 |:-:         | :-:            | :-:                                                                                        |:-:              |\n| 1  | \"Hello World!\" in C |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/hello-world-c/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Introduction/%22Hello%20World!%22%20in%20C)|\n| 2  | Playing With Characters |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/playing-with-characters/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Introduction/Playing%20With%20Characters)|\n| 3  | Sum and Difference of Two Numbers |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/sum-numbers-c/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Introduction/Sum%20and%20Difference%20of%20Two%20Numbers)|\n| 4  | Functions in C |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/functions-in-c/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Introduction/Functions%20in%20C)|\n| 5  | Pointers in C |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/pointer-in-c/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Introduction/Pointers%20in%20C)|\n| 6  | Conditional Statements in C |[Conditionals and Loops](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Conditionals%20and%20Loops)|Easy            |[Click Here](https://www.hackerrank.com/challenges/conditional-statements-in-c/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Conditionals%20and%20Loops/Conditional%20Statements%20in%20C)|\n| 7  | For Loop in C |[Conditionals and Loops](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Conditionals%20and%20Loops)|Easy            |[Click Here](https://www.hackerrank.com/challenges/conditional-statements-in-c/problem?isFullScreen=true)|[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Conditionals%20and%20Loops/For%20Loop%20in%20C)|\n| 8  | Sum of Digits of a Five Digit Number |[Conditionals and Loops](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Conditionals%20and%20Loops)|Easy            |[Click Here](https://www.hackerrank.com/challenges/conditional-statements-in-c/problem?isFullScreen=true)|[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Conditionals%20and%20Loops/Sum%20of%20Digits%20of%20a%20Five%20Digit%20Number)|\n| 9  | Bitwise Operators |[Conditionals and Loops](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Conditionals%20and%20Loops)|Easy            |[Click Here](https://www.hackerrank.com/challenges/conditional-statements-in-c/problem?isFullScreen=true)|[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Conditionals%20and%20Loops/Bitwise%20Operators)|\n| 10 | Printing Pattern Using Loops |[Conditionals and Loops](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Conditionals%20and%20Loops)|Easy            |[Click Here](https://www.hackerrank.com/challenges/conditional-statements-in-c/problem?isFullScreen=true)|[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Conditionals%20and%20Loops/Printing%20Pattern%20Using%20Loops)|\n| 11 | 1D Arrays in C |[Arrays and Strings](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Arrays%20and%20Strings)|Medium           |[Click Here](https://www.hackerrank.com/challenges/1d-arrays-in-c/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Arrays%20and%20Strings/1D%20Arrays%20in%20C)|\n| 12 | Array Reversal |[Arrays and Strings](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Arrays%20and%20Strings)|Medium           |[Click Here](https://www.hackerrank.com/challenges/reverse-array-c/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Arrays%20and%20Strings/Array%20Reversal)|\n| 13 | Printing Tokens |[Arrays and Strings](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Arrays%20and%20Strings)|Medium           |[Click Here](https://www.hackerrank.com/challenges/printing-tokens-/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Arrays%20and%20Strings/Printing%20Tokens)|\n| 14 | Digit Frequency |[Arrays and Strings](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Arrays%20and%20Strings)|Medium           |[Click Here](https://www.hackerrank.com/challenges/frequency-of-digits-1/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Arrays%20and%20Strings/Digit%20Frequency)|\n| 15 | Dynamic Array in C |[Arrays and Strings](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Arrays%20and%20Strings)|Medium           |[Click Here](https://www.hackerrank.com/challenges/dynamic-array-in-c/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Arrays%20and%20Strings/Dynamic%20Array%20in%20C)|\n| 16 | Calculate the Nth term |[Functions](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Functions)|Easy           |[Click Here](https://www.hackerrank.com/challenges/recursion-in-c/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Functions/Calculate%20the%20Nth%20term)|\n| 17 | Students Marks Sum |[Functions](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Functions)|Easy           |[Click Here](https://www.hackerrank.com/challenges/students-marks-sum/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Functions/Students%20Marks%20Sum)|\n| 18 | Permutations of Strings |[Functions](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Functions)|Medium           |[Click Here](https://www.hackerrank.com/challenges/permutations-of-strings/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Functions/Permutations%20of%20Strings)|\n| 19 | Variadic functions in C |[Functions](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Functions)|Medium           |[Click Here](https://www.hackerrank.com/challenges/variadic-functions-in-c/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Functions/Variadic%20functions%20in%20C)|\n| 20 | Sorting Array of Strings |[Functions](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Functions)|Hard           |[Click Here](https://www.hackerrank.com/challenges/sorting-array-of-strings/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Functions/Sorting%20Array%20of%20Strings)|\n| 21 | Querying the Document |[Functions](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Functions)|Hard           |[Click Here](https://www.hackerrank.com/challenges/querying-the-document/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Functions/Querying%20the%20Document)|\n| 22 | Boxes through a Tunnel |[Structs and Enums](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Structs%20and%20Enums)|Easy           |[Click Here](https://www.hackerrank.com/challenges/too-high-boxes/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Structs%20and%20Enums/Boxes%20through%20a%20Tunnel)|\n| 23 | Small Triangles, Large Triangles |[Structs and Enums](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Structs%20and%20Enums)|Medium           |[Click Here](https://www.hackerrank.com/challenges/small-triangles-large-triangles/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Structs%20and%20Enums/Small%20Triangles%2C%20Large%20Triangles)|\n| 24 | Structuring the Document |[Structs and Enums](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Structs%20and%20Enums)|Hard           |[Click Here](https://www.hackerrank.com/challenges/structuring-the-document/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Structs%20and%20Enums/Structuring%20the%20Document)|\n| 25 | Post Transition |[Structs and Enums](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Structs%20and%20Enums)|Hard           |[Click Here](https://www.hackerrank.com/challenges/post-transition/problem?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/C/Structs%20and%20Enums/Post%20Transition)|\n\n\n## JAVA\n\n\n|    | Problem Name        |SubDomain   |Difficulty Level|HackerRank Panel Link                                                                       |Solution         |\n| :-:| :-:                 |:-:         | :-:            | :-:                                                                                        |:-:              |\n| 1  | Welcome to Java |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/welcome-to-java?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Welcome%20to%20Java) |\n| 2  | Java Stdin and Stdout 1 |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-stdin-and-stdout-1?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Java%20Stdin%20and%20Stdout)|\n| 3  | Java If-Else |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-if-else?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Java%20If-Else)|\n| 4  | Java Stdin and Stdout 2 |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-stdin-stdout?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Java%20Stdin%20and%20Stdout%20ll)|\n| 5  | Java Output Formatting |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-output-formatting?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Java%20Output%20Formatting)|\n| 6  | Java Loops 1 |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-loops-i?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Java%20Loops%20l)|\n| 7  | Java Loops 2 |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-loops?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Java%20Loops%20ll)|\n| 8  | Java Datatypes |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-datatypes?isFullScreen=true) |[CLick Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Java%20Datatypes)|\n| 9  | Java End-of-file |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-end-of-file?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Java%20End-of-file)|\n| 10  | Java Static Initializer Block |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-static-initializer-block?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Java%20Static%20Initializer%20Block)|\n| 11  | Java Int to String |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-int-to-string?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Java%20Int%20to%20String)|\n| 12  | Java Date and Time |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-date-and-time?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Java%20Date%20and%20Time)|\n| 13  | Java Currency Formatter |[Introduction](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-currency-formatter?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Introduction/Java%20Currency%20Formatter)|\n| 14  | Java Regex |[String](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings)|Medium            |[Click Here](https://www.hackerrank.com/challenges/java-regex?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings/Java%20Regex)|\n| 15  | Java Strings Introduction |[String](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings)|Easy            |[Click Here]( https://www.hackerrank.com/challenges/java-strings-introduction?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings/Java%20Strings%20Introduction)|\n| 16  | Java Substring |[String](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings)|Easy            |[Click Here]( https://www.hackerrank.com/challenges/java-substring?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings/Java%20Substring)|\n| 17  | Java Substring Comparisions |[String](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-string-compare?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings/Java%20Substring%20Comparisions)|\n| 18  | Java String Reverse |[String](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-string-reverse?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings/Java%20String%20Reverse)|\n| 19  | Java Anagrams |[String](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-anagrams?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings/Java%20Anagram)|\n| 20  | Java String Tokens |[String](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-string-tokens?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings/Java%20String%20Tokens)|\n| 21  | Pattern Syntax Checker |[String](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings)|Easy            |[Click Here](https://www.hackerrank.com/challenges/pattern-syntax-checker?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings/Pattern%20Syntax%20Checker)|\n| 22  | Java Regex 2-Duplicate Words |[String](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings)|Medium            |[Click Here](https://www.hackerrank.com/challenges/duplicate-word?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings/Java%20Regex%202)|\n| 23  | Valid Username Regular Expression |[String](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings)|Easy            |[Click Here](https://www.hackerrank.com/challenges/valid-username-checker?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings/Valid%20Username%20Regular%20Expression)|\n| 24  | Tag Content Extractor |[String](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings)|Medium            |[Click Here](https://www.hackerrank.com/challenges/tag-content-extractor?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Strings/Tag%20Content%20Extractor)|\n| 25  | Java Primality Test |[BigNumber](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/BigNumber)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-primality-test?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/BigNumber/Java%20Primality%20Test)|\n| 26  | Java BigInteger |[BigNumber](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/BigNumber)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-biginteger?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/BigNumber/Java%20BigInteger)|\n| 27  | Java BigDecimal |[BigNumber](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/BigNumber)|Medium            |[Click Here](https://www.hackerrank.com/challenges/java-bigdecimal?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/BigNumber/Java%20BigDecimal)|\n| 28  | Java Subarray |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-negative-subarray?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%20Subarray)|\n| 29  | Java 1D Array |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Easy             |[Click Here](https://www.hackerrank.com/challenges/java-1d-array-introduction?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%201D%20Array)|\n| 30  | Java 2D Array |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Easy             |[Click Here](https://www.hackerrank.com/challenges/java-2d-array?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%202D%20Array)|\n| 31  | Java ArrayList |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Easy             |[Click Here](https://www.hackerrank.com/challenges/java-arraylist?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%20ArrayList)|\n| 32  | Java 1D Array(Part 2) |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Medium            |[Click Here](https://www.hackerrank.com/challenges/java-1d-array?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%201D%20Array%20(Part%202))|\n| 33  | Java List |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Easy             |[Click Here](https://www.hackerrank.com/challenges/java-list?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%20List)|\n| 34  | Java Map |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Easy             |[Click Here](https://www.hackerrank.com/challenges/phone-book?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%20Map)|\n| 35  | Java Stack |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Medium            |[Click Here](https://www.hackerrank.com/challenges/java-stack?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%20Stack)|\n| 36  | Java Hashset |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-hashset?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%20Hashset)|\n| 37  | Java Generics |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Easy             |[Click Here](https://www.hackerrank.com/challenges/java-generics?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%20Generics)|\n| 38  | Java Comparator |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Medium            |[Click Here](https://www.hackerrank.com/challenges/java-comparator?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%20Comparator)|\n| 39  | Java Sort |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-sort?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%20Sort)|\n| 40  | Java Dequeue |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Medium            |[Click Here](https://www.hackerrank.com/challenges/java-dequeue?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%20Dequeue)|\n| 41  | Java Bitset |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Easy             |[Click Here](https://www.hackerrank.com/challenges/java-bitset?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%20Bitset)|\n| 42  | Java Priority Queue |[Data Structures](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures)|Medium            |[Click Here](https://www.hackerrank.com/challenges/java-priority-queue?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Data%20Structures/Java%20Priority%20Queue)|\n| 43  | Java Inheritance 1 |[Object Oriented Programming](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-inheritance-1?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming/Java%20Inheritance%201)|\n| 44  | Java Inheritance 2 |[Object Oriented Programming](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-inheritance-2?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming/Java%20Inheritance%202)|\n| 45  | Java Abstract Class |[Object Oriented Programming](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-abstract-class?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming/Java%20Abstract%20Class)|\n| 46  | Java Interface |[Object Oriented Programming](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-interface?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming/Java%20Interface)|\n| 47  | Java Method Overriding |[Object Oriented Programming](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-method-overriding?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming/Java%20Method%20Overriding)|\n| 48  | Java Method Overriding 2(Super Keyword) |[Object Oriented Programming](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-method-overriding-2-super-keyword?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming/Java%20Method%20Overriding%202%20(Super%20Keyword))|\n| 49  | Java Instanceof keyword |[Object Oriented Programming](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-instanceof-keyword?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming/Java%20Instanceof%20keyword)|\n| 50  | Java Iterator |[Object Oriented Programming](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-iterator?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming/Java%20Iterator)|\n| 50  | Java Iterator |[Object Oriented Programming](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-iterator?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Object%20Oriented%20Programming/Java%20Iterator)|\n| 51  | Java Exception Handling |[Exception Handling](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Exception%20Handling)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-exception-handling?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Exception%20Handling/Java%20Exception%20Handling)|\n| 52  | Java Exception Handling (Try-catch) |[Exception Handling](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Exception%20Handling)|Easy            |[Click Here](https://www.hackerrank.com/challenges/java-exception-handling-try-catch?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Exception%20Handling/Java%20Exception%20Handling%20(Try-catch))|\n| 53  | Java Varargs - Simple Addition |[Advanced](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Advanced)|Easy            |[Click Here](https://www.hackerrank.com/challenges/simple-addition-varargs?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Advanced/Java%20Varargs%20-%20Simple%20Addition)|\n| 54  | Java Reflection - Attributes |[Advanced](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Advanced)|Easy            |[Click Here](https://www.hackerrank.com/challenges/simple-addition-varargs?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Advanced/Java%20Reflection%20-%20Attributes)|\n| 55  | Java Factory Pattern |[Advanced](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Advanced)|Easy            |[Click Here](https://www.hackerrank.com/challenges/simple-addition-varargs?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Advanced/Java%20Factory%20Pattern)|\n| 56  | Java Singleton Pattern |[Advanced](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Advanced)|Easy            |[Click Here](https://www.hackerrank.com/challenges/simple-addition-varargs?isFullScreen=true) |[Click Here](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Advanced/Java%20Singleton%20Pattern)|\n| 57  | Covariant Return Types |[Advanced](https://github.com/Harsh971/HackerRank_Solutions/tree/main/Java/Advanced)|Easy            |[Click 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