01
Programming & Logic Building Basics
Concepts
  • What is DSA?
  • Time & Space Complexity basics
  • Algorithm vs Program
  • Flowcharts & Pseudocode
  • Problem solving techniques
Practice
  • Number problems
  • Pattern printing
  • Basic math logic
  • Dry run practice
02
Time & Space Complexity
Concepts
  • Big O notation
  • Big Omega
  • Big Theta
  • Best, Average, Worst case
  • Complexity analysis of loops
  • Nested loops analysis
  • Recursion complexity
Examples
  • O(1) O(n) O(log n) O(n²) O(2ⁿ)
  • 03
    Arrays
    Concepts
    • 1D, 2D arrays
    • Traversal
    • Insert/Delete
    • Searching
    • Rotations
    • Prefix sum
    • Subarrays
    Algorithms
    • Linear Search
    • Binary Search
    • Kadane's Algorithm
    • Two pointer technique
    Problems
    • Reverse array
    • Find duplicates
    • Max/Min element
    • Leaders in array
    • Stock buy/sell
    04
    Strings
    • String operations
    • Character arrays
    • Palindrome
    • Anagrams
    • Frequency count
    • StringBuilder usage
    Problems
    • Reverse string
    • Remove duplicates
    • Longest substring
    • Pattern matching
    05
    Recursion
    • What is recursion
    • Base case & recursive case
    • Stack memory concept
    • Backtracking intro
    Programs
    • Factorial
    • Fibonacci
    • Sum of digits
    • Power calculation
    • Tower of Hanoi
    06
    Sorting Algorithms
    Basic
    • Bubble Sort
    • Selection Sort
    • Insertion Sort
    Advanced
    • Merge Sort
    • Quick Sort
    • Heap Sort
    • Counting Sort
    Concepts
    • Stable vs Unstable
    • In-place sorting
    • Complexity comparison
    07
    Searching Algorithms
    • Linear Search
    • Binary Search
    • Binary Search on Answer
    • Lower bound / Upper bound
    08
    Stack
    Concepts
    • LIFO
    • Stack implementation (Array + LinkedList)
    Applications
    • Parenthesis checking
    • Infix → Postfix
    • Postfix evaluation
    • Next greater element
    • Stock span problem
    09
    Queue
    Concepts
    • FIFO
    • Queue implementation
    Types
    • Simple queue
    • Circular queue
    • Deque
    • Priority queue
    Applications
    • CPU scheduling
    • BFS traversal
    10
    Linked List
    Types
    • Singly Linked List
    • Doubly Linked List
    • Circular Linked List
    Operations
    • Insert/Delete
    • Reverse
    • Middle node
    • Detect cycle
    Problems
    • Merge two lists
    • Remove duplicates
    • Intersection point
    11
    Hashing
    Concepts
    • Hash function
    • Hash table
    • Collisions
    • Chaining
    Structures
    • HashSet
    • HashMap
    Problems
    • Two sum
    • Frequency count
    • First non-repeating element
    • Subarray sum
    12
    Trees
    Basics
    • Tree terminology
    • Binary tree
    • Types of trees
    Traversals
    • Inorder
    • Preorder
    • Postorder
    • Level order
    Problems
    • Height of tree
    • Count nodes
    • Mirror tree
    13
    Binary Search Tree (BST)
    • Insert/Delete/Search
    • Min/Max
    • LCA
    • Validate BST
    14
    Heap / Priority Queue
    • Min heap
    • Max heap
    • Heapify
    • Heap sort
    Problems
    • K largest elements
    • Top K frequent
    • Median in stream
    15
    Graphs
    Concepts
    • Graph representation (Adj list, matrix)
    • Directed vs Undirected
    Traversals
    • BFS
    • DFS
    Algorithms
    • Cycle detection
    • Topological sort
    • Dijkstra
    • Prim's
    • Kruskal
    • Shortest path
    16
    Greedy Algorithms
    • Activity selection
    • Fractional knapsack
    • Job scheduling
    • Huffman coding
    17
    Dynamic Programming
    Concepts
    • Memoization
    • Tabulation
    • Overlapping subproblems
    Problems
    • Fibonacci
    • Climbing stairs
    • 0/1 Knapsack
    • LCS
    • LIS
    • Coin change
    • Subset sum
    18
    Backtracking
    • N-Queens
    • Sudoku solver
    • Rat in maze
    • Permutations & combinations
    19
    Interview Preparation
    • Coding patterns
    • Problem solving strategies
    • Mock tests
    • Time management
    LeetCode / HackerRank practice
  • 100+ coding questions
  • 🔹 Mini Projects (DSA Based)

    Students should build:

    Library system using linked list
    Student ranking using heap
    Search engine using hashing
    Maze solver using graphs
    Banking system using queues