DD3

• System Design
• Data Structures and Algorithms
• In 3 Weeks

This repository contains my practice problems for algorithms and system design, organized by the week they were solved. Use the indices below to find problems by topic or by week.

How to Use This Repository

• Week directories will hold "lc/" and "sd/" directories
  • lc for leetcode.com problems
  • sd for system design
• Algorithm solutions will be in Python files
• System Designs will be in markdown with screenshots of designs from whiteboarding
• The indexes below will organize solutions by week and by topic

Problem Index by Topic

Algorithms

Array

• Two Sum

BFS

• LC 3286 Find a Safe Walk Through a Grid
• LC 1293 Shortest Path in a Grid with Obstacles Elimination #hard

Dynamit Programming

• LC 63 Unique Paths II
• LC 740. Delete and Earn

Stack

• Valid Parentheses

String

• Is Unique

System Design

Problem Index by Week

Week 1

• Algorithms

  • Two Sum - #Array
  • Valid Parentheses - #Stack
  • Is Unique #String
  • LC 3286 Find a Safe Walk Through a Grid #BFS
  • LC 1293 Shortest Path in a Grid with Obstacles Elimination #hard #BFS
  • LC 63 Unique Paths II #Dynaic Programming
  • LC 740. Delete and Earn #Dynaic Programming

• System Design

• Lecture 1

Week Two

• Algorithms
• System Design

Week Three

• Algorithms
• System Design