| Problem Name | Problem Link | Language | Solution Link |
|---|---|---|---|
| Day 0: Hello, World. | Problem | java | Solution |
| Day 10: Binary Numbers | Problem | java | Solution |
| Day 11: 2D Arrays | Problem | java | Solution |
| Day 12: Inheritance | Problem | java | Solution |
| Day 13: Abstract Classes | Problem | java | Solution |
| Day 14: Scope | Problem | java | Solution |
| Day 15: Linked List | Problem | java | Solution |
| Day 16: Exceptions - String to Integer | Problem | java | Solution |
| Day 17: More Exceptions | Problem | java | Solution |
| Day 18: Queues and Stacks | Problem | java | Solution |
| Day 19: Interfaces | Problem | java | Solution |
| Day 1: Data Types | Problem | java | Solution |
| Day 20: Sorting | Problem | java | Solution |
| Day 21: Generics | Problem | java | Solution |
| Day 22: Binary Search Trees | Problem | java | Solution |
| Day 23: BST Level-Order Traversal | Problem | java | Solution |
| Day 24: More Linked Lists | Problem | java | Solution |
| Day 25: Running Time and Complexity | Problem | java | Solution |
| Day 26: Nested Logic | Problem | java | Solution |
| Day 27: Testing | Problem | java | Solution |
| Day 28: RegEx, Patterns, and Intro to Databases | Problem | java | Solution |
| Day 29: Bitwise AND | Problem | java | Solution |
| Day 2: Operators | Problem | java | Solution |
| Day 3: Intro to Conditional Statements | Problem | java | Solution |
| Day 4: Class vs. Instance | Problem | java | Solution |
| Day 5: Loops | Problem | java | Solution |
| Day 6: Let's Review | Problem | java | Solution |
| Day 7: Arrays | Problem | cpp | Solution |
| Day 8: Dictionaries and Maps | Problem | java | Solution |
| Day 9: Recursion 3 | Problem | java | Solution |
30DaysofCode
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