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Algorithms for Coding Interviews in C++

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Introduction

Who This Course Is For Learning Outcomes

Algorithmic Paradigms

Greedy Algorithms

Divide and Conquer

Dynamic Programming

Introduction to Complexity Measures

Comparing Algorithms Example: Measuring Time Complexity of a Single Loop Algorithm Example: Time Complexity of an Algorithm With Nested Loops Introduction to Asymptotic Analysis and Big O Other Common Asymptotic Notations and Why Big O Trumps Them Useful Formulae Common Complexity Scenarios Challenge: Big (O) of Nested Loop with Addition Solution: Big (O) of Nested Loop with Addition Challenge: Big (O) of Nested Loop with Subtraction Solution: Big (O) of Nested Loop with Subtraction Challenge: Big (O) of Nested Loop with Multiplication Solution: Big (O) of Nested Loop with Multiplication Challenge: Nested Loop with Multiplication (Basic)Solution: Nested Loop with Multiplication (Basic)Challenge: Nested Loop with Multiplication (Intermediate)Solution: Nested Loop with Multiplication (Intermediate)Challenge: Nested Loop with Multiplication (Advanced)Solution: Nested Loop with Multiplication (Advanced)Challenge: Nested Loop with Multiplication (Pro)Solution: Nested Loop with Multiplication (Pro)Complexity Quiz: Test your Understanding of Complexity

Sorting & Searching

Selection Sort, Bubble Sort, & Insertion Sort Merge Sort Quicksort Overview of Sorting Algorithms Searching Algorithms Challenge: Find Two Numbers that Add up to "s"Solution: Find Two Numbers that Add up to "s"Challenge: Search in a Rotated Array Solution: Search in a Rotated Array Challenge: Group Anagrams Solution: Group Anagrams Challenge: Find the Median of Two Sorted Arrays Solution: Find the Median of Two Sorted Arrays Challenge: Find Duplicates in Array Solution: Find Duplicates in Array Challenge: Search in Sorted Matrix Solution: Search in Sorted Matrix Challenge: Count Element Occurrence Solution: Count Element Occurrence Challenge: Search Insert Position Solution: Search Insert Position Challenge: Sparse Search Solution: Sparse Search Challenge: Dutch National Flag Problem Solution: Dutch National Flag Problem Quiz on Sorting & Searching

Graph Algorithms

Introduction to Graph Algorithms and Implementation Challenge: Implement Breadth First Graph Traversal Solution: Breadth First Graph Traversal Challenge: Implement Depth First Graph Traversal Solution: Depth First Graph Traversal Challenge: Calculate the Number of Nodes in a Given Graph Level Solution: Calculate the Number of Nodes in a Given Graph Level Challenge: Print the Transpose of a Graph Solution: Print the Transpose of a Graph Challenge: Print all Paths Between Two Nodes Solution: Print all Paths Between Two Nodes Challenge: Check If Graph is Strongly Connected Solution: Check if a Graph is Strongly Connected Challenge: Print all Connected Components in a Graph Solution: Print all Connected Components of a Graph Challenge: Check if Removing Edge Creates Components in Graph Solution: Check if Removing Given Edge Creates Components in Graph Challenge: Check If Given Graph is Bipartite Solution: Check If Given Graph is Bipartite Challenge: Topological Sorting of a Graph Solution: Topological Sorting of a Graph Quiz on Graph Algorithms

Greedy Algorithms

Activity Scheduling Problem Challenge: Counting Money Solution: Counting Money Challenge: Connecting n Pipes with Minimum Cost Solution: Connecting n Pipes with Minimum Cost Challenge: Find the Egyptian Fraction Solution: Find the Egyptian Fraction Challenge: Find Minimum Number of Platforms Required for a Train Station Solution: Find Minimum Number of Platforms Required for a Train Station Challenge: Help the Policemen Catch the Thieves Solution: Help the Policemen Catch the Thieves Challenge: Fractional Knapsack Problem Solution: Fractional Knapsack Problem Challenge: Largest Number with Given Number of Digits and Sum of Digits Solution: Largest Number with Given Number of Digits and Sum of Digits Challenge: Graph Coloring Solution: Graph Coloring Challenge: Find the Minimum Spanning Tree of the Given Graph Solution: Find the Minimum Spanning Tree - Kruskal’s Solution Solution: Find the Minimum Spanning Tree - Prim's Solution Challenge: Find Shortest Distance of Each Node from the Source Solution: Shortest Distance of Each Node from the Source Quiz on Greedy Algorithms

Dynamic Programming

Calculating Fibonnacci Numbers Introducing Dynamic Programming With Fibonacci Numbers Memoizing Fibonacci Numbers Tabulating Fibonacci Numbers Challenge: The 0/1 Knapsack Problem Solution: The 0/1 Knapsack Problem Challenge: Staircase Problem Solution: Staircase Problem Challenge: The Partition Problem Solution: The Partition Problem Challenge: Longest Common Substring Solution: Longest Common Substring Challenge: Shortest Common Supersequence Solution: Shortest Common Supersequence Challenge: Longest Palindromic Subsequence Solution: Longest Palindromic Subsequence Challenge: The Coin Change Problem Solution: Coin Change Problem Challenge: Egg Dropping Problem Solution: Egg Dropping Problem Challenge: Strings Interleaving Solution: Strings Interleaving Challenge: Edit Distance Problem Solution: The Edit Distance Problem Quiz on Dynamic Programming

Divide and Conquer

Introduction to Divide and Conquer with Binary Search Pascal's Triangle Challenge: Euclidean Algorithm Solution: Euclidean Algorithm Challenge: Peak Element Solution: Peak Element Challenge: Maximum Subarray Sum Solution: Maximum Subarray Sum Challenge: Merge a Number of Sorted Arrays Solution: Merge a Number of Sorted Arrays Challenge: Collect Coins in Minimum Steps Solution: Collect Coins in Minimum Steps Challenge: Find The Closest Number Solution: Find Closest Number Challenge: Closest Pair of Points Solution: Closest Pair of Points Challenge: Missing Number in Sorted Array Solution: Missing Number in Sorted Array Challenge: Binary Search on Singly Linked List Solution: Binary Search on Singly Linked List Challenge: Shuffle Integers Solution: Shuffle Integers Quiz on Divide and Conquer

Appendix: Auxiliary Source Code

STL Classes Linked List Array Functions Graph

Conclusion

Overview Where to Go from Here

Divide and Conquer

We'll cover the following

Divide and Conquer Method

Divide and Conquer Method

Divide and Conquer is an algorithmic paradigm in which the problem is repeatedly divided into sub-problems until we reach a point where each problem is similar and atomic (i.e. can’t be further divided).

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