1. Write a Java program to implement a red-black tree.

2. Write a Java program to implement an AVL tree.

3. Write a Java program to implement a B-tree.

4. Write a Java program to implement a segment tree for range sum queries.

5. Write a Java program to implement a Fenwick tree (Binary Indexed Tree).

6. Write a Java program to implement a suffix array.

7. Write a Java program to implement a suffix tree.

8. Write a Java program to find the longest increasing subsequence in an array.

9. Write a Java program to solve the maximum flow problem using the Ford-Fulkerson algorithm.

10. Write a Java program to solve the traveling salesman problem using dynamic programming.

11. Write a Java program to solve the N-Queens problem using backtracking.

12. Write a Java program to implement the A* search algorithm.

13. Write a Java program to implement the Bellman-Ford algorithm for shortest paths.

14. Write a Java program to implement the Floyd-Warshall algorithm for all-pairs shortest paths.

15. Write a Java program to implement the Viterbi algorithm for Hidden Markov Models.

16. Write a Java program to implement the KMP (Knuth-Morris-Pratt) pattern matching algorithm.

17. Write a Java program to implement the Boyer-Moore pattern matching algorithm.

18. Write a Java program to find strongly connected components in a graph using Kosaraju’s algorithm.

19. Write a Java program to find articulation points (or cut vertices) in a graph.

20. Write a Java program to find bridges in a graph.

21. Write a Java program to implement a bloom filter.

22. Write a Java program to implement a skip list.

23. Write a Java program to implement a topological sort of a directed acyclic graph (DAG).

24. Write a Java program to solve the 0/1 knapsack problem using branch and bound.

25. Write a Java program to solve the job scheduling problem with deadlines.

26. Write a Java program to solve the word break problem using dynamic programming.

27. Write a Java program to solve the wildcard matching problem using dynamic programming.

28. Write a Java program to implement a least recently used (LRU) cache using a doubly linked list and a hash map.

29. Write a Java program to implement a self-balancing binary search tree (Treap).

30. Write a Java program to perform matrix multiplication using Strassen's algorithm.

31. Write a Java program to solve the convex hull problem using Graham's scan algorithm.

32. Write a Java program to find the shortest common supersequence of two strings.

33. Write a Java program to implement a k-d tree (k-dimensional tree).

34. Write a Java program to implement a randomized quicksort algorithm.

35. Write a Java program to find the kth smallest element in a matrix sorted row-wise and column-wise.

36. Write a Java program to solve the subset sum problem using backtracking.

37. Write a Java program to solve the painter's partition problem using binary search and dynamic programming.

38. Write a Java program to find the maximum size rectangle of all 1's in a binary matrix.

39. Write a Java program to find the median of two sorted arrays.

40. Write a Java program to solve the word ladder problem using BFS.

41. Write a Java program to implement a trie with insert, search, and delete operations.

42. Write a Java program to implement a persistent segment tree.

43. Write a Java program to find the longest palindromic subsequence in a string.

44. Write a Java program to find the maximum sum of a subarray with at most k elements.

45. Write a Java program to implement a concurrent hash map.

46. Write a Java program to solve the problem of finding the smallest range that includes at least one element from each of the given k lists.

47. Write a Java program to implement the shortest path faster algorithm (SPFA).

48. Write a Java program to solve the circular buffer problem.

49. Write a Java program to implement an LFU (Least Frequently Used) cache.

50. Write a Java program to find the largest rectangular area possible in a histogram.