1. Write a program to implement a concurrent producer-consumer problem using threads.
2. Write a program to implement a simple HTTP server using sockets.
3. Write a program to find the longest path in a weighted graph using dynamic programming.
4. Write a program to implement the N-Queens problem using backtracking with optimization.
5. Write a program to implement a bloom filter.
6. Write a program to perform a topological sort on a directed acyclic graph (DAG).
7. Write a program to implement a red-black tree.
8. Write a program to solve the traveling salesman problem using dynamic programming.
9. Write a program to implement a simple LRU cache.
10. Write a program to implement the Bellman-Ford algorithm for shortest paths.
11. Write a program to implement a simple search engine using inverted indexing.
12. Write a program to perform matrix exponentiation for Fibonacci sequence calculation.
13. Write a program to solve the maximum bipartite matching problem using augmenting paths.
14. Write a program to implement the KMP algorithm for substring search.
15. Write a program to find strongly connected components in a directed graph using Tarjan's algorithm.
16. Write a program to implement a Segment Tree for range queries.
17. Write a program to implement a suffix tree and find all occurrences of a pattern in a string.
18. Write a program to solve the coin change problem using memoization.
19. Write a program to find the maximum flow in a flow network using the Ford-Fulkerson method.
20. Write a program to implement a trie for auto-complete functionality.
21. Write a program to solve the maximum subarray sum problem using Kadane’s algorithm.
22. Write a program to implement a disjoint-set (union-find) data structure.
23. Write a program to implement a hash map with separate chaining.
24. Write a program to solve the edit distance problem using dynamic programming.
25. Write a program to find the longest increasing subsequence in a 2D grid.
26. Write a program to implement the A* search algorithm for pathfinding.
27. Write a program to implement a basic file system using classes and data structures.
28. Write a program to find the shortest path in a weighted grid using Dijkstra's algorithm.
29. Write a program to implement a randomized quicksort algorithm.
30. Write a program to find the minimum spanning tree of a graph using Prim’s algorithm.
31. Write a program to implement the Rabin-Karp algorithm for string matching.
32. Write a program to calculate the inverse of a matrix using Gaussian elimination.
33. Write a program to implement a simple version control system.
34. Write a program to solve the 0/1 Knapsack problem using branch and bound.
35. Write a program to implement a basic chat application using TCP sockets.
36. Write a program to solve the maximum rectangle area problem in a binary matrix.
37. Write a program to implement a multi-threaded file downloader.
38. Write a program to calculate the power of a number using exponentiation by squaring.
39. Write a program to implement a basic digital signature system.
40. Write a program to generate all valid parentheses combinations using backtracking.