Algorithms, Problems, Solutions and Tips

Classical Algorithms

• Binary Search Tree Python
• Breadth First Search - BFS Python
• Depth First Search - DFS Python
• Dijkstra Python
• Factorial Python
• Heapsort C++
• Linked List C++

Design Patterns

• Singleton
• Factory
• Façade
• Proxy
• Observer
• Command
• Template Method
• State

Python Tips

• Batched
• Cached Session
• Currying
• Debugging with pdb
• Decorator
• Defaultdict
• Filter
• Format
• Function Overloading
• List Comprehension
• Map
• Starmap
• Walrus Operator
• Yield
• Zip Longest

Problems and Solutions

• Flatten List Python
• Fractional Knapsack C++
• Interval Scheduling Python
• Polynomial Multiplication C++
• Shortest Path for Buildings Python

From HackerRank

• 2D Arrays - DS C++ Arrays
• Array Manipulation C++ Arrays
• Count Triplets C++ Arrays
• Counting Valleys C++
• DFS: Connected Cell in a Grid Python Graph
• Equal Stacks Python Stack
• Find the Nearest Clone Python Graph Greedy
• Find a String Python String
• Frequency Queries Python
• Is This a Binary Search Tree? Python Graph Tree
• Jumping on the Clouds C++
• Kangaroo Python
• Leap Day Python
• Left Rotation C++ Arrays String
• Lowest Common Ancestor Python Graph Tree
• Mark and Toys Python Arrays Greedy
• Minimum Swaps 2 C++ Arrays Greedy Sorting
• New Year Chaos C++ Arrays
• Ransom Note Python String
• Repeated String C++ String
• Reverse a Doubly Linked List Python List
• Roads and Libraries Python Graph
• Sales by Match C++ Arrays Greedy Sorting
• Sherlock and Anagrams Python String
• Two Strings Python String

From LeetCode

• Shortest Path to Get Food Python Graph