my-leet

[ramHruday]

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DSA

• Complete Git & GitHub Course

• Introduction to Programming

  • • Types of languages
  • • Memory management

• Flow of the program

  • • Flowcharts
  • • Pseudocode

• Introduction to Java

  • • Introduction
  • • How it works
  • • Setup Installation
  • • Input and Output in Java
  • • Conditionals & Loops in Java
    • • if else
    • • loops
    • • Switch statements
  • • Data types
  • • Coding best practices

• Functions

  • • Introduction
  • • Scoping in Java
  • • Shadowing
  • • Variable Length Arguments
  • • Overloading

• Arrays

  • • Introduction
  • • Memory management
  • • Input and Output
  • • ArrayList Introduction
  • • Sorting
    • • Insertion Sort
    • • Selection Sort
    • • Bubble Sort
    • • Cyclic Sort (Merge sort etc after recursion)

  • Searching

    • • Linear Search
    • • Binary Search
    • • Modified Binary Search
    • • Binary Search Interview questions
    • • Binary Search on 2D Arrays

• Pattern questions

• Strings

  • Introduction
  • How Strings work
  • Comparison of methods
  • Operations in Strings
  • StringBuilder in java

• Maths for DSA

  • • Introduction
  • • Complete Bitwise Operators
  • • Prime numbers
  • • HCF / LCM
  • • Sieve of Eratosthenes
  • • Newton's Square Root Method
  • • Number Theory
  • • Euclidean algorithm

• Space and Time Complexity Analysis

  • • Introduction
  • • Comparion of various cases
  • • Solving Linear Recurrence Relations
  • • Solving Divide and Conquer Recurrence Relations
  • • Big-O, Big-Omega, Big-Theta Notations
  • • Get equation of any relation easily - best and easiest approach
  • • Complexity discussion of all the problems we do
  • • Space Complexity
  • • Memory Allocation of various languages
  • • NP Completeness and Hardness

• Recursion

  • • Introduction
  • • Why recursion?
  • • Flow of recursive programs - stacks
  • • Convert recursion to iteration
  • • Tree building of function calls
  • • Tail recursion

  • • Sorting:

      • • Merge Sort
      • • Quick Sort

  • • Backtracking

      • • Sudoku Solver
      • • N-Queens
      • • N-Knights
      • • Maze problems
  • • Recursion String Problems
  • • Recursion Array Problems
  • • Recursion Pattern Problems
  • • Subset Questions
  • • Recursion - Permutations, Dice Throws etc Questions

• Object Oriented Programming

  • • Introduction
  • • Classes & its instances
  • • this keyword in Java

  • • Properties

      • • Inheritance
      • • Abstraction
      • • Polymorphism
      • • Encapsulation
  • • Overloading & Overriding
  • • Static & Non-Static
  • • Access Control
  • • Interfaces
  • • Abstract Classes
  • • Singleton Class
  • • final, finalize, finally
  • • Exception Handling

• Linked List

  • • Introduction
  • • Singly and Doubly Linked List
  • • Circular Linked List
  • • Fast and slow pointer
  • • Cycle Detection
  • • Reversing of LinekdList
  • • Linked List Interview questions

• Stacks & Queues

  • • Introduction
  • • Interview problems
  • • Push efficient
  • • Pop efficient
  • • Queue using Stack and Vice versa
  • • Circular Queue

• Dynamic Programming

  • • Introduction
  • • Recursion + Recursion DP + Iteration + Iteration Space Optimized
  • • Complexity Analysis
  • • 0/1 Knapsack
  • • Subset Questions
  • • Unbounded Knapsack
  • • Subseq questions
  • • String DP

• Trees

  • • Introduction
  • • Binary Trees
  • • Binary Search Trees
  • • DFS
  • • BFS
  • • AVL Trees
  • • Segment Tree
  • • Fenwick Tree / Binary Indexed Tree

• Heaps

  • • Introduction
  • • Theory
  • • Priority Queue
  • • Two Heaps Method
  • • k-way merge
  • • top k elements
  • • interval problems

• Hashmaps

  • • Introduction
  • • Theory - how it works
  • • Comparisons of various forms
  • • Limitations and how to solve
  • • Map using LinkedList
  • • Map using Hash
  • • Chaining
  • • Probing
  • • Huffman-Encoder

• Tries

• Graphs

  • • Introduction
  • • BFS
  • • DFS
  • • Working with graph components
  • • Minimum Spanning Trees
  • • Kruskal Algorithm
  • • Prims Algorithm
  • • Dijkstra’s shortest path algorithm
  • • Topological Sort
  • • Bellman ford
  • • A* pathfinding Algorithm

• Greedy Algorithms

Advanced concepts apart from interviews

• Fast IO
• File handling
• Bitwise + DP
• Extended Euclidean algorithm
• Modulo Multiplicative Inverse
• Linear Diophantine Equations
• Matrix Exponentiation
• Mathematical Expectation
• Catalan Numbers
• Fermat’s Theorem
• Wilson's Theorem
• Euler's Theorem
• Lucas Theorem
• Chinese Remainder Theorem
• Euler Totient
• NP-Completeness
• Multithreading
• Fenwick Tree / Binary Indexed Tree
• Square Root Decomposition