| 1. | Totally Normal – Determine if Two Strings Are Close – 1657 | 9 | |
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| 2. | Balls Fall Up – Where Will the Ball Fall – Leetcode 1706 | 5 | |
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| 3. | Goodbye | 3 | |
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| 4. | Dit dah dit dit dah – Unique Morse Code Words – Leetcode 804 | 3 | |
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| 5. | SHOT THROUGH THE HEART – Minimum Number of Arrows to Burst Balloons – Leetcode 452 | 3 | |
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| 6. | Noice. – Maximum 69 Number – Leetcode 1323 | 2 | |
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| 7. | r1c1 – Valid Sudoku – Leetcode 36 | 2 | |
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| 8. | This MEDIUM stumped me! – Perfect Squares – Leetcode 279 | 2 | |
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| 9. | Déjà Vu – Remove Duplicates from Sorted Array – Leetcode 26 | 2 | |
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| 10. | Yuck! – Ugly Number – Leetcode 263 | 2 | |
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| 11. | Funny sliding windows – Leetcode 729 – My Calendar I | 2 | |
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| 12. | INTERNET, MY BELOVED – Non-decreasing Subsequences – Leetcode 491 | 1 | |
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| 13. | Only a little googling! – Minimum Window Substring – Leetcode 76 | 1 | |
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| 14. | Bit twiddling shenanigans! – Power of Four – Leetcode 342 | 1 | |
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| 15. | 100 SUBS! – Odd Even Linked List –Leetcode 328 | 1 | |
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| 16. | A star solution – Shortest Path in a Grid with Obstacles Elimination – Leetcode 1293 | 1 | |
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| 17. | Counting mirrors – Longest Palindrome by Concatenating Two Letter Words – Leetcode 2131 | 1 | |
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| 18. | Sneaky A's – Break a Palindrome – Leetcode 1328 | 0 | |
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| 19. | SemiQuickSelectSort – Top K Frequent Words – Leetcode 692 | 0 | |
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| 20. | Counting counts – Unique Number of Occurrences – Leetcode 1207 | 0 | |
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| 21. | Is this actually medium? – Peeking Iterator – Leetcode 284 | 0 | |
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| 22. | MinMaxing FTW – Maximum Difference Between Node and Ancestor – Leetcode 1026 | 0 | |
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| 23. | Lazy Leaf Crunching – Leaf-Similar Trees – Leetcode 872 | 0 | |
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| 24. | BONUS – Solved! – Valid Sudoku – Leetcode 36 | 0 | |
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| 25. | False start! – Average of Levels in Binary Tree – Leetcode 637 | 0 | |
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| 26. | What a BEAST – Sum of Subarray Minimums – Leetcode 907 | 0 | |
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| 27. | Colouring in time! – Is Graph Bipartite? – Leetcode 785 | 0 | |
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| 28. | Let's go chunk-hunting... – Shortest Unsorted Continuous Subarray – Leetcode 581 | 0 | |
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| 29. | Recursively recursing – Path Sum – Leetcode 112 | 0 | |
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| 30. | Good Vs Evil! – Count the Good Nodes in Binary Tree – Leetcode 1448 | 0 | |
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| 31. | Merge then discard!? – Leetcode 378 – Kth smallest element in a sorted matrix | 0 | |
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| 32. | Too many combinations! – Reordered Power of 2 – Leetcode 869 | 0 | |
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| 33. | Snip, snip! – Trim a Binary Search Tree – Leetcode 669 | 0 | |
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| 34. | I Scream for... – Maximum Ice Cream Bars – Leetcode 1833 | 0 | |
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| 35. | No, it's not LISP – Construct String from Binary Tree – Leetcode 606 | 0 | |
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| 36. | Gotta go fast – Design HashMap – Leetcode 706 | 0 | |
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| 37. | The Hitchhikers Guide to Spelling – Verifying an Alien Dictionary – Leetcode 953 | 0 | |
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| 38. | Speedy Turtles – Delete the Middle Node of a Linked List – Leetcode 2095 | 0 | |
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| 39. | Absolute madness – Minimum Average Difference – Leetcode 2256 | 0 | |
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| 40. | The Dynamic String – Maximum Length of a Concatenated String with Unique Characters – Leetcode 1239 | 0 | |
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| 41. | Party Popper – Minimum Time to Make Rope Colorful – Leetcode 1578 | 0 | |
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| 42. | Special cases... – Word Search – Leetcode 79 | 0 | |
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| 43. | Hop-stopping – Cheapest Flights Within K Stops – Leetcode 787 | 0 | |
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| 44. | A bit of clever counting... – Leetcode 62 – Unique paths | 0 | |
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| 45. | Stack Pointers – Remove All Adjacent Duplicates In String – Leetcode 1047 | 0 | |
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| 46. | Pure. Instinct. – Binary Tree Pruning – Leetcode 814 | 0 | |
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| 47. | Don't be cheeky now – Encode and Decode TinyURL – Leetcode 535 | 0 | |
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| 48. | Stringy Pancakes – Make The String Great – Leetcode 1544 | 0 | |
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| 49. | Galloping challenge – Guess Number Higher or Lower – Leetcode 374 | 0 | |
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| 50. | A jump to the left! – N-ary Tree Level Order Traversal – Leetcode 429 | 0 | |
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| 51. | Smart Indices – Toeplitz Matrix – Leetcode 766 | 0 | |
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| 52. | All for the want of two lines – Path With Minimum Effort – Leetcode 1631 | 0 | |
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| 53. | Left or right!? – Convert BST to Greater Tree – Leetcode 538 | 0 | |
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| 54. | Complexity Progression – Contains Duplicate II – Leetcode 219 | 0 | |
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| 55. | To recurse, or not to recurse... – Search in a Binary Search Tree – Leetcode 700 | 0 | |
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| 56. | I guess I can't be that lazy... – Time Based Key-Value Store – Leetcode 981 | 0 | |
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| 57. | Pan-language Pangrams – Check if the Sentence Is Pangram – Leetcode 1832 | 0 | |
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| 58. | Confused by iterators! – Binary Search Tree Iterator – Leetcode 173 | 0 | |
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| 59. | APL hacking – Increasing Triplet Subsequence – Leetcode 334 | 0 | |
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| 60. | Catcatcatcat... – Concatenated Words – Leetcode 472 | 0 | |
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| 61. | Funky Tree Climbing – Longest Path With Different Adjacent Characters – Leetcode 2246 | 0 | |
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| 62. | Uniquely indexed! – First Unique Character in a String – Leetcode 387 | 0 | |
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| 63. | Feature-length coding session! – Word Search II – Leetcode 212 | 0 | |
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| 64. | Tri-way Tribonacci – N-th Tribonacci Number – Leetcode 1137 | 0 | |
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| 65. | I HATE this question! – Delete Node in a Linked List – Leetcode 237 | 0 | |
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| 66. | Setting stones – Most Stones Removed with Same Row or Column – Leetocde 947 | 0 | |
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| 67. | Easy Win – Find Players With Zero or One Losses – Leetcode 2225 | 0 | |
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| 68. | The OTHER big end – Reduce Array Size to The Half – Leetcode 1338 | 0 | |
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| 69. | One-handed puzzling – Validate Binary Search Tree – Leetcode 98 | 0 | |
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| 70. | Packing those bits!– Design HashSet – Leetcode 705 | 0 | |
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| 71. | Racing Rabbit – Middle of the Linked List – Leetcode 876 | 0 | |
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| 72. | Phantom matrices? – Design Underground System – Leetcode 1396 | 0 | |
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| 73. | Short and Sweet – Sort Characters By Frequency – Leetcode 451 | 0 | |
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| 74. | Going AROUND AND AROUND – Spiral Matrix II – Leetcode 59 | 0 | |
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| 75. | Adding carefully! – Set Mismatch – Leetcode 645 | 0 | |
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| 76. | Scanning and swapping... – Reverse Vowels of a String – Leetcode 345 | 0 | |
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| 77. | I'm SO confused... – Find Closest Node to Given Two Nodes – Leetcode 2359 | 0 | |
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| 78. | Polish Parsing – Basic Calculator – Leetcode 224 | 0 | |
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| 79. | Maybe INCORRECT? – Longest Consecutive Sequence – Leetcode 128 | 0 | |
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| 80. | Beware the flood... – Number of Islands – Leetcode 200 | 0 | |
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| 81. | It's basically inverting a dict, right? – Find Duplicate File in System – Leetcode 609 | 0 | |
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| 82. | I made that look difficult... – Counting Bits – Leetcode 338 | 0 | |
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| 83. | Asterix Mathematix– Integer to Roman – Leetcode 12 | 0 | |
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| 84. | Sneaky Sorts! – Rectangle Area – Leetcode 223 | 0 | |
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| 85. | Futzing with pointers – Kth Smallest Element in a BST – Leetcode 230 | 0 | |
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| 86. | Quick Maths – Power of Three – Leetcode 326 | 0 | |
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| 87. | Skips and Jumps – Online Stock Span – Leetcode 901 | 0 | |
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| 88. | GOLF IT – Reverse Words in a String III – Leetcode 557 | 0 | | Golf It!
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| 89. | It's always too slow... – Concatenation of Consecutive Binary Numbers – Leetcode 1680 | 0 | |
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| 90. | Boustrophedonning – Snakes and Ladders – Leetcode 909 | 0 | |
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| 91. | Roman backstroke! – Roman to Integer – Leetcode 13 | 0 | |
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| 92. | Interval... Trees...? – My Calendar III – Leetcode 732 | 0 | |
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| 93. | Up and Down – Sum of Even Numbers After Queries – Leetcode 985 | 0 | |
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| 94. | Transpositionality! – Delete Columns to Make Sorted – Leetcode 944 | 0 | |
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| 95. | It's not what I thought! – Image Overlap – Leetcode 835 | 0 | |
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| 96. | All about that trace – Lowest Common Ancestor of a Binary Search Tree – Leetcode 235 | 0 | |
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| 97. | Spinning rings! – Rotate Image – Leetcode 48 | 0 | |
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| 98. | Python makes it TOO easy! – Check If Two String Arrays are Equivalent – Leetcode 1662 | 0 | |
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| 99. | Using the right data structure helps... – Min Cost to Connect All Points – Leetcode 1584 | 0 | |
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| 100. | Yet Another Graph Search – Minimum Time to Collect All Apples in a Tree – Leetcode 1443 | 0 | |
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