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