4999 2499

Finding the number of digits in a number.

Arithmetic and Geometric Progressions.

Quadratic Equations.

Mean and Median.

Prime Numbers.

LCM and HCF

Factorials

Permutations and Combinations

Modular Arithmetic

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Bitwise Operators in C++

• Operation of AND, OR, XOR operators

• Operation of Left Shift, Right Shift and Bitwise Not

Bitwise Operators in Java

• Operation of AND, OR

• Operation of Bitwise Not, Left Shift

• Operation of Right Shift and unsigned Right Shift

Problem(With Video Solutions): Check Kth bit is set or not

• Method 1: Using the left Shift.

• Method 2: Using the right shift

Problem(With Video Solutions): Count Set Bits

• Method 1: Simple method

• Method 2: Brian and Kerningham Algorithm

• Method 3: Using Lookup Table

Problems(With Video Solutions):

• To check whether a number is a power of 2 or not

• Odd occurrences in an array.

• Two numbers having odd occurrences in an array.

• Generate power set using bitwise operators.

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Explanation using examples

Writing base cases in Recursion

• Factorial

• N-th Fibonacci number

Various problems on Recursion(With Video Solutions)

• Print n to 1

• Tail Recursion

• Checking Palindrome

• Sum of digits

• Rod cutting

• Subsets of a set

• Tower of Hanoi Problem

• Josephus Problem

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction and Advantages

Types of Arrays

• Fixed-sized array

• Dynamic-sized array

Operations on Arrays

• Searching

• Insertions

• Deletion

• Arrays vs other DS

• Reversing - Explanation with complexity

Problems(With Video Solutions)

• Left Rotation of the array by 1

• Left Rotation of the array by D places

• Leaders in an Array

• Maximum Difference Problem

• Stock Buy and Sell Problem

• Trapping Rainwater Problem

• Maximum subarray sum

• Longest even-odd subarray

• Maximum Circular sum subarray.

• Majority Element

• Sliding Window Technique

• Prefix sum technique

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Binary Search and various associated problems(With Video Solutions)

• Leftmost index of an element in an array

• Count of occurrences of x in sorted element

• Count of 1s in a binary sorted array

• Find an element in sorted and rotated array

• Peak element

• Find an element in an infinite sized sorted array

• The square root of an integer

Two Pointer Approach Problems(With Video Solutions)

• Find pair in an unsorted array which gives sum X

• Find pair in a sorted array which gives sum X

• Find triplet in an array which gives sum X

Problems(With Video Solutions)

• Median of two sorted arrays 

• Majority Element 

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Implementation of C++ STL sort() function in Arrays and Vectors

• Time Complexities

Sorting in Java

Arrays.sort() in Java

Collection.sort() in Java

Stability in Sorting Algorithms

• Examples of Stable and Unstable Algos

Insertion Sort

Merge Sort

Problems(With Video Solutions)

• Intersection of 2 sorted arrays

• Union of 2 sorted arrays

• Count Inversions in arrays

Partitions(With Video Solutions)

• Naive

• Lomuto

• Hoare

Quick Sort

• Using Lomuto and Hoare

• Time and Space analysis

• Choice of Pivot and Worst case

• Tail call elimination

Problems(With Video Solutions)

• Kth Smallest element

• Chocolate Distribution Problem

• Sorting arrays with 2 and3 types of elements

• Merge Overlapping Intervals

Cycle Sort

Counting Sort

Radix Sort

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction to Matrix in C++ and Java

Printing matrix in a snake pattern

Transposing a matrix

Rotating a Matrix

Check if the element is present in a row and column-wise sorted matrix.

Boundary Traversal

Spiral Traversal

Matrix Multiplication

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction and Time complexity analysis

Application of Hashing

Discussion on Direct Address Table

Working and examples on various Hash Functions

Introduction and Various techniques on Collision Handling

Chaining and its implementation

Open Addressing and its Implementation

Chaining V/S Open Addressing

Double Hashing

C++

• Unordered Set

• Unordered Map

Java

• HashSet

• HashMap

Problems(With Video Solutions):

• Count Distinct Elements

• Count of the frequency of array elements

• The intersection of two arrays

• Union of two unsorted arrays

• Pair with given sum in an unsorted array

• Subarray with zero-sum

• Subarray with given sum

• Longest subarray with a given sum

• Longest subarray with an equal number of 0’s and 1’s

• Longest common span with the same sum in a binary array

• Longest Consecutive Subsequence

• Count Distinct elements in every window

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Discussion of String DS

Problems(With Video Solutions):

• Given a string, check if they are an anagram of each other.

• Given a string, find the leftmost character that repeats.

• Given a string, find the leftmost character that does not repeat.

• ?Given a string, find the lexicographic rank of it in O(n) time.

• Implementation of the previously discussed lexicographic rank problem.

• Given a text string and a pattern string, find if a permutation of the pattern exists in the text.

• Given two strings, check if they are rotations of each other or not.

• Various Pattern Searching Algorithms.

Rabin Karp Algorithm

KMP Algorithm

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction

• Implementation in CPP

• Implementation in Java

• Comparison with Array DS

Doubly Linked List

Circular Linked List

Loop Problems

• Detecting Loops

• Detecting loops using Floyd cycle detection

• Detecting and Removing Loops in Linked List

Problems(With Video Solutions):

• Middle of Linked List

• Nth node from the end of linked list

• Deleting a Node without accessing Head pointer of Linked List

• An iterative method to Reverse a linked list 

• Recursive method to reverse a linked list

• Segregating even-odd nodes of linked list

• The intersection of two linked list

• Pairwise swap nodes of linked list

• Clone a linked list using a random pointer

• LRU Cache Design

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Understanding the Stack data structure 

Applications of Stack

Implementation of Stack in Array and Linked List

• In C++

• In Java 

Problems(With Video Solutions):

• Balanced Parenthesis 

• Two stacks in an array 

• K Stacks in an array 

• Stock span problem with variations

• Previous Greater Element 

• Next Greater Element 

• Largest Rectangular Area in a Histogram

Understanding getMin() in Stack with O(1)

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction and Application

Implementation of the queue using array and LinkedList

• In C++ STL

• In Java

• Stack using queue

Problems(With Video Solutions)

• Reversing a Queue

• Generate numbers with given digits

• Maximums of all subarrays of size k

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction

• Tree

• Application

• Binary Tree

• Tree Traversal

Implementation of:

• Inorder Traversal 

• Preorder Traversal 

• Postorder Traversal 

• Level Order Traversal (Line by Line)

• Tree Traversal in Spiral Form 

Problems(With Video Solutions):

• Size of Binary Tree 

• Maximum in Binary Tree 

• Height of Binary Tree 

• Print Nodes at K distance 

• Print Left View of Binary Tree 

• Children Sum Property 

• Check for Balanced Binary Tree 

• Maximum Width of Binary Tree 

• Convert Binary Tree to Doubly Linked List 

• Construct Binary Tree from Inorder and Preorder 

• The diameter of a Binary Tree 

• LCA problem with an efficient solution

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Background, Introduction and Application

Implementation of Search in BST

• In CPP 

• In Java

Insertion in BST 

• In CPP

• In Java

Deletion in BST 

• In CPP

• In Java

Floor in BST 

• In CPP

• In Java

Self Balancing BST 

AVL Tree 

Red Black Tree 

Set in C++ STL 

Map in C++ STL 

TreeSet in java 

TreeMap in Java 

Problems(With Video Solutions):

• The ceiling of a key in BST

• Ceiling on the left side in an array 

• Find Kth Smallest in BST 

• Check for BST 

• Fix BST with Two Nodes Swapped 

• Pair Sum with given BST 

• Vertical Sum in a Binary Tree 

• Vertical Traversal of Binary Tree 

• Top View of Binary Tree 

• Bottom View of Binary Tree

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction & Implementation

Binary Heap 

• Insertion

• Heapify and Extract

• Decrease Key, Delete and Build Heap

Heap Sort 

Priority Queue in C++ 

PriorityQueue in Java

Problems(With Video Solutions): 

• Sort K-Sorted Array 

• Buy Maximum Items with Given Sum 

• K Largest Elements 

• Merge K Sorted Arrays 

• Median of a Stream

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction to Graph 

Graph Representation 

• Adjacency Matrix

• Adjacency List in CPP and Java

• Adjacency Matrix VS List

Breadth-First Search 

• Applications

Depth First Search 

• Applications

Problems(With Video Solutions):

• Shortest Path in an Unweighted Graph 

• Detecting Cycle

  • In the Undirected Graph 

  • In the Directed Graph

• Topological Sorting 

  • Kahn's BFS Based Algorithm

  • DFS Based Algorithm

Shortest Path in Directed Acyclic Graph 

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction

Activity Selection Problem

Fractional Knapsack 

Job Sequencing Problem

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Concepts of Backtracking 

Rat In a Maze 

N Queen Problem 

Sudoku Problem 

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction 

Dynamic Programming

• Memoization 

• Tabulation

Problems(With Video Solutions):

• Longest Common Subsequence

• Coin Change Count Combinations 

• Edit Distance Problem

  • Naive Approach

  • DP Approach

• Longest Increasing Subsequence Problem

  • Naive Approach

  • Efficient Approach

• Maximum Cuts 

• Minimum coins to make a value 

• Minimum Jumps to reach at the end 

• 0-1 knapsack problem 

  • Naive Approach

  • Efficient Approach

• Optimal Strategy for a Game 

• Variation of Longest Common Subsequence 

• Variation of Longest Increasing Subsequence 

• Egg Dropping Problem 

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Prim's Algorithm/Minimum Spanning Tree

Dijkstra's Shortest Path Algorithm

Bellman-Ford Shortest Path Algorithm

Kosaraju's Algorithm

Articulation Point

Bridges in Graph

Tarjan’s Algorithm

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction

• Representation

• Search

• Insert

• Delete

Count Distinct Rows in a Binary Matrix

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction

Construction

Range Query 

Update Query

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.

Introduction

Find and Union Operations

Union by Rank

Path Compression

Kruskal's Algorithm

Practice Problems

• This track contains many practice problems for the users which are considered important and must-do as far as Data Structure and Algorithm is concerned.