https://github.com/hasanulmukit/programming-problems

A curated repository of programming problem solutions implemented in C, C++, Java, and Python. Organized by topic and difficulty, it provides a clear and accessible resource for developers and learners to explore algorithms, data structures, and coding challenges.
https://github.com/hasanulmukit/programming-problems

c coding-interviews coding-test cpp java programming-exercises programming-problems python

Last synced: 5 months ago
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A curated repository of programming problem solutions implemented in C, C++, Java, and Python. Organized by topic and difficulty, it provides a clear and accessible resource for developers and learners to explore algorithms, data structures, and coding challenges.

• Host: GitHub
• URL: https://github.com/hasanulmukit/programming-problems
• Owner: hasanulmukit
• License: mit
• Created: 2025-02-17T04:57:18.000Z (9 months ago)
• Default Branch: main
• Last Pushed: 2025-03-29T04:32:35.000Z (7 months ago)
• Last Synced: 2025-06-02T04:06:00.875Z (5 months ago)
• Topics: c, coding-interviews, coding-test, cpp, java, programming-exercises, programming-problems, python
• Language: Java
• Homepage:
• Size: 171 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Programming Problems

Welcome to my collection of programming problems and their solutions implemented in multiple languages: **C**, **C++**, **Java**, and **Python**.

Each problem is categorized (e.g., Basic, Intermediate, Advanced, Miscellaneous). Click on a problem to see the solutions in your preferred programming language.

---

## Table of Contents

- [Basic Questions](#basic-questions)

- [Intermediate Questions](#intermediate-questions)

- [Advanced Questions](#advanced-questions)

- [Miscellaneous Questions](#miscellaneous-questions)

- [Contributing](#contributing)

- [License](#license)

---

## Basic Questions

1. **Write a program to reverse a string**

      

2. **Find the largest and smallest number in an array**

      

3. **Check if a string is a palindrome**

      

4. **Write a program to check if a number is prime**

      

5. **Check if a number is a palindrome**

      

6. **Print the Fibonacci series up to n terms (iteration)**

      

7. **Find duplicates in an array**

      

8. **Check if a number is even or odd**

      

9. **Write a program to find the factorial of a number**

      

10. **Swap two numbers without using a third variable**

       

11. **Write a program to count the number of vowels and consonants in a string**

       

12. **Implement a basic calculator for addition, subtraction, multiplication, and division**

       

13. **Find the sum of the digits of a given number**

       

14. **Check if a number is prime or composite**

       

15. **Find the missing number in an array of size n containing numbers from 1 to n+1 in C**

       

16. **Find all pairs in an array whose sum is equal to a given number**

       

17. **Write a program to remove duplicates from a sorted array**

       

18. **Write a program to move all zeros in an array to the end**

       

19. **Implement a program to check if a string contains all unique characters**

       

20. **Reverse the words in a sentence without reversing the letters**

       

21. **Reverse a linked list (iterative)**

       

22. **Reverse a linked list (recursive)**

       

23. **Find the middle element of a linked list in one traversal**

       

24. **Implement a queue using a circular array**

       

25. **Solve the Activity Selection Problem**

       

26. **Write a program to find the largest number possible from an array of numbers**

       

---

## Intermediate Questions

1. **Implement a stack using an array**

      

2. **Implement a queue using an array**

      

3. **Merge two sorted arrays into a single sorted array**

      

4. **Solve the Fibonacci series using recursion**

      

5. **Implement bubble sort algorithm**

      

6. **Implement insertion sort algorithm**

      

7. **Implement binary search for a sorted array**

      

8. **Implement binary search for an unsorted array**

      

9. **Find the second largest number in an array**

      

10. **Write a program to check if two strings are anagrams**

       

11. **Convert a decimal number to binary**

       

12. **Find the GCD (Greatest Common Divisor) and LCM (Least Common Multiple) of two numbers**

       

13. **Write a program to rotate an array by k positions**

       

14. **Implement a stack and its operations (push, pop, peek) using an array**

       

15. **Find the majority element in an array (element that appears more than n2 times)**

       

16. **Find the longest common prefix in an array of strings**

       

17. **Find the first non-repeating character in a string**

       

18. **Write a program to implement string compression (e.g., aaabb → a3b2)**

       

19. **Merge two sorted linked lists**

       

20. **Implement a queue using an array**

       

21. **Detect and remove a cycle in a linked list**

       

22. **Write a program to evaluate a postfix expression**

       

23. **Implement a min stack that supports push, pop, and retrieving the minimum element in constant time**

       

24. **Solve the 01 Knapsack Problem**

       

25. **Find the length of the longest increasing subsequence**

       

26. **Solve the Coin Change Problem (minimum coins needed to make a sum)**

       

27. **Find the longest common subsequence of two strings**

       

28. **Implement Huffman Encoding**

       

29. **Find the minimum number of coins needed for a given amount using a greedy approach**

       

30. **Generate all subsets of a given set using recursion**

       

31. **Solve the Fractional Knapsack Problem**

       

32. **Solve the Topological Sorting Problem for a directed acyclic graph (DAG)**

       

33. **Write a program to detect a cycle in a directed graph using DFS**

       

34. **Tree traversals (inorder, preorder, postorder)**

       

35. **Write a program to find the intersection of two sorted arrays**

       

---

## Advanced Questions

1. **Implement merge sort algorithm**

      

2. **Implement quicksort algorithm**

      

3. **Write a program to check if a linked list is a palindrome**

      

4. **Implement a queue using two stacks**

      

5. **Solve the N-Queens Problem using backtracking**

      

6. **Write a program to detect a cycle in a linked list**

      

7. **Find the shortest path in a graph using Dijkstra’s Algorithm**

      

8. **Check if a binary tree is a valid binary search tree (BST)**

      

9. **Write a program to solve the Knapsack Problem using dynamic programming**

      

10. **Implement depth-first search (DFS) for a graph**

       

11. **Implement breadth-first search (BFS) for a graph**

       

12. **Find the maximum area of a rectangle in a histogram**

       

13. **Implement the Tower of Hanoi**

       

14. **Write a program to compute the nth Catalan number**

       

15. **Design a hash map from scratch using an array and linked list**

       

16. **Find the connected components of an undirected graph**

       

17. **Implement Floyd-Warshall Algorithm for all-pairs shortest paths**

       

18. **Implement Kruskal’s Algorithm for finding the Minimum Spanning Tree (MST)**

       

19. **Solve the Snake and Ladder Problem using a graph representation**

       

## Miscellaneous Questions

1. **Pattern #1**

   

---

## Contributing

Contributions are welcome! If you have a new solution or an improvement:

1. Fork this repository.

2. Create a new branch for your feature/fix.

3. Commit your changes and open a pull request.

Please ensure your code follows the existing structure.

---

## License

Distributed under the MIT License. See [LICENSE](LICENSE) for more information.