Comprehensive Coding Solutions for DSA Hash Table | Expert Help

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Boost your Data Structures and Algorithms expertise with our diverse problem sets. Perfect for interview prep and competitive programming.

All Hash Table Problems

  1. Two Sum
  2. Longest Substring Without Repeating Characters
  3. Integer to Roman
  4. Roman to Integer
  5. Letter Combinations of a Phone Number
  6. Substring with Concatenation of All Words
  7. First Missing Positive
  8. Group Anagrams
  9. Set Matrix Zeroes
  10. Minimum Window Substring
  11. Word Ladder II
  12. Word Ladder
  13. Longest Consecutive Sequence
  14. Clone Graph
  15. Copy List with Random Pointer
  16. Word Break
  17. Word Break II
  18. Linked List Cycle
  19. Linked List Cycle II
  20. LRU Cache
  21. Max Points on a Line
  22. Longest Substring with At Most Two Distinct Characters
  23. Intersection of Two Linked Lists
  24. Fraction to Recurring Decimal
  25. Majority Element
  26. Two Sum III – Data structure design
  27. Repeated DNA Sequences
  28. Happy Number
  29. Isomorphic Strings
  30. Implement Trie (Prefix Tree)
  31. Contains Duplicate
  32. Contains Duplicate II
  33. Majority Element II
  34. Valid Anagram
  35. Shortest Word Distance II
  36. Strobogrammatic Number
  37. Group Shifted Strings
  38. Ugly Number II
  39. Palindrome Permutation
  40. Palindrome Permutation II
  41. Missing Number
  42. Unique Word Abbreviation
  43. Word Pattern
  44. Word Pattern II
  45. Bulls and Cows
  46. Number of Islands II
  47. Sparse Matrix Multiplication
  48. Binary Tree Vertical Order Traversal
  49. Maximum Size Subarray Sum Equals k
  50. Palindrome Pairs
  51. Longest Substring with At Most K Distinct Characters
  52. Top K Frequent Elements
  53. Design Tic-Tac-Toe
  54. Intersection of Two Arrays
  55. Intersection of Two Arrays II
  56. Design Snake Game
  57. Design Twitter
  58. Line Reflection
  59. Rearrange String k Distance Apart
  60. Logger Rate Limiter
  61. Design Phone Directory
  62. Insert Delete GetRandom O(1)
  63. Insert Delete GetRandom O(1) – Duplicates allowed
  64. Ransom Note
  65. First Unique Character in a String
  66. Find the Difference
  67. Longest Substring with At Least K Repeating Characters
  68. Random Pick Index
  69. Longest Palindrome
  70. Maximum XOR of Two Numbers in an Array
  71. Reconstruct Original Digits from English
  72. Longest Repeating Character Replacement
  73. All O`one Data Structure
  74. Minimum Genetic Mutation
  75. Find All Anagrams in a String
  76. Find All Duplicates in an Array
  77. Number of Boomerangs
  78. Find All Numbers Disappeared in an Array
  79. Sort Characters By Frequency
  80. 4Sum II
  81. Circular Array Loop
  82. LFU Cache
  83. Sliding Window Median
  84. Non-decreasing Subsequences
  85. Next Greater Element I
  86. Keyboard Row
  87. Most Frequent Subtree Sum
  88. Random Flip Matrix
  89. Longest Uncommon Subsequence II
  90. Continuous Subarray Sum
  91. Contiguous Array
  92. Lonely Pixel I
  93. K-diff Pairs in an Array
  94. Lonely Pixel II
  95. Encode and Decode TinyURL
  96. Split Array with Equal Sum