| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 81 | Safe Division | Easy | Error HandlingTry-CatchValidation |
| 82 | Input Validator | Easy | Error HandlingTry-CatchLoop |
| 83 | File Word Counter | Easy | Error HandlingFile I/OTry-Catch |
| 84 | Array Index Safety | Easy | Error HandlingTry-CatchArrays |
| 85 | Age Calculator with Validation | Easy | Error HandlingTry-CatchDate |
| 86 | Config File Reader | Easy | Error HandlingFile I/OParsing |
| 87 | Number Parser | Easy | Error HandlingTry-CatchTypes |
| 88 | Stack Overflow Prevention | Easy | Error HandlingRecursionLimits |
| 89 | Custom Exception Creator | Easy | Error HandlingException Classes |
| 90 | Retry Mechanism | Easy | Error HandlingTry-CatchLoop |
| 91 | Stack Using Array | Easy | Data StructuresStackArray |
| 92 | Queue Using Array | Easy | Data StructuresQueueArray |
| 93 | Expression Evaluator | Easy | Data StructuresStackParsing |
| 94 | Phone Book (HashMap) | Easy | Data StructuresHashMapCRUD |
| 95 | Unique Elements Counter | Easy | Data StructuresSetArray |
| 96 | Undo Text Editor | Easy | Data StructuresStackString |
| 97 | Shopping Cart | Easy | Data StructuresList/ArrayStruct |
| 98 | Student Record Manager | Easy | Data StructuresStruct/ClassArray |
| 99 | Circular Buffer | Easy | Data StructuresArrayModulo |
| 100 | Frequency-Based Sorting | Easy | Data StructuresHashMapSorting |