• Maximum Subarray Sum
• Find the Missing Number
• Trapping Rain Water
• Maximum Product Subarray
• Find the equilibrium index of an array
• Leaders in an array
• Minimum Platforms Required for a Railway/Bus Station
• Rotate an array to the right by k steps
• Kth smallest/largest element in an array
• Maximum Length Bitonic Subarray

For more, please refer: Array Data Structure Guide

2. String Algorithm

• Longest Palindromic Substring
• String Matching with Wildcard
• Edit Distance
• Longest Repeating Subsequence
• Count all distinct substrings of a given string
• Reverse words in a given string
• Check if a string is a rotated palindrome
• KMP Algorithm for Pattern Searching
• Minimum characters to be added at front to make string palindrome

For more, please refer: String Data Structure

3. Sorting Algorithm

• QuickSort
• MergeSort
• HeapSort
• Counting Sort
• Radix Sort
• Bubble Sort
• Selection Sort
• Insertion Sort
• Shell Sort
• Bucket Sort

For more, please refer: Sorting Algorithms

4. Searching Algorithm

• Linear Search
• Binary Search
• Ternary Search
• Depth-First Search (DFS)
• Breadth-First Search (BFS)
• Fibonacci Search

For more, please refer: Searching Algorithms

5. Recursion/Backtracking Algorithm

• N-Queens Problem
• Sudoku Solver
• Rat in a Maze
• Word Break Problem using Backtracking
• Subset Sum Problem
• Permutations of a given string
• Combination Sum
• Generate all possible valid IP addresses from given string
• Rat in a Maze with multiple steps or jump allowed

For more, please refer: Recursion/Backtracking Algorithm

6. Greedy Algorithm

• Fractional Knapsack
• Huffman Coding
• Job Sequencing with Deadlines
• Activity Selection Problem
• Greedy Algorithm to find Minimum number of Coins
• Minimum Number of Platforms Required for a Railway/Bus Station
• Maximum Length Chain of Pairs
• Minimize Cash Flow among a given set of friends who have borrowed money from each other
• Connect n Ropes with Minimum Cost
• Prim's Minimum Spanning Tree (MST)

For more, please refer: Greedy Algorithms

7. Tree Algorithm

• Lowest Common Ancestor (LCA)
• Diameter of Binary Tree
• Binary Tree Level Order Traversal
• Serialize and Deserialize a Binary Tree
• Check if a Binary Tree is BST
• Inorder Traversal without Recursion
• Convert Binary Tree to Doubly Linked List
• Check if Two Trees are Identical
• Maximum Width of a Binary Tree
• Mirror of a Binary Tree

For more, please refer: Tree Data Structure

8. Dynamic Programming Algorithm

• Longest Common Subsequence
• 0/1 Knapsack
• Matrix Chain Multiplication
• Longest Increasing Subsequence
• Maximum Sum Increasing Subsequence
• Coin Change Problem
• Longest Palindromic Subsequence
• Edit Distance
• Largest Sum Contiguous Subarray
• Longest Common Substring

For more, please refer: Dynamic Programming

9. Graph Algorithm

• Dijkstra's Algorithm
• Kruskal's Algorithm
• Topological Sorting
• Bellman-Ford Algorithm
• Floyd Warshall Algorithm
• Prim's Algorithm
• Depth-First Traversal of a Graph
• Breadth-First Traversal of a Graph
• Detect Cycle in a Directed Graph
• Articulation Points (or Cut Vertices) in a Graph

For more, please refer: Graph Algorithms

10. Bit Manipulation Algorithm

• Find the Only Non-Repeating Element
• Count Total Set Bits
• Maximum XOR of Two Numbers in an Array
• Find the two non-repeating elements in an array of repeating elements
• Check if a number is sparse or not
• Count total set bits in all numbers from 1 to n
• Maximum subarray XOR in a given array
• Sum of XOR of all subarrays
• Find the element that appears once in an array where every other element appears twice
• Program to find whether a no is power of two

For more, please refer: Bitwise Algorithms

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