| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 101 | Regex Pattern Matcher | Medium | Advanced StringsStringPattern |
| 102 | Log File Analyzer | Medium | Advanced StringsStringParsing |
| 103 | Morse Code Translator | Medium | Advanced StringsStringHashMap |
| 104 | Markdown to Plain Text | Medium | Advanced StringsStringParsing |
| 105 | DNA Sequence Analyzer | Medium | Advanced StringsStringSliding Window |
| 106 | Shortest Unique Prefix Finder | Medium | Advanced StringsStringTrie |
| 107 | Diff Tool Builder | Medium | Advanced StringsStringComparison |
| 108 | Tokenizer Builder | Medium | Advanced StringsStringParsing |
| 109 | Auto-Complete System | Medium | Advanced StringsStringTrie |
| 110 | CSV Parser | Medium | Advanced StringsStringParsing |
| 111 | Spell Checker | Medium | Advanced StringsStringDistance |
| 112 | Template Engine | Medium | Advanced StringsStringParsing |
| 113 | Custom Sort Comparator | Medium | Sorting & SearchingArrayComparator |
| 114 | Binary Search Variants | Medium | Sorting & SearchingArrayBinary Search |
| 115 | Merge Sort Implementation | Medium | Sorting & SearchingArrayDivide & Conquer |
| 116 | Quick Sort with Pivot Strategies | Medium | Sorting & SearchingArrayPartitioning |
| 117 | Matrix Spiral Traversal | Medium | Arrays2D ArrayLogic |
| 118 | Sudoku Validator | Medium | Arrays2D ArrayValidation |
| 119 | Matrix Multiplication | Medium | Arrays2D ArrayMath |
| 120 | Saddle Point Finder | Medium | Arrays2D ArrayLoop |