drmacsika / algoexpert-solutions

Discover solutions to algoexpert problems in six programming languages: Python, Java, Go, C++, C#, and JavaScript/TypeScript

Solutions to AlgoExpert Problems in Six Programming Languages: Python, Java, Go, C++, C#, JavaScript/TypeScript

Discover solutions to AlgoExpert problems in six programming languages: Python, Java, Go, C++, C#, and JavaScript/TypeScript.

⭐ Table of Contents:

• Screenshots
• List of AlgoExpert Problems and Solutions
  • Difficulty Levels Guide
  • Problems and Solutions
• Contributing

Screenshots

List of Problems and Solutions

Difficulty Levels Guide

• 🟢 -> Easy
• 🔵 -> Medium
• 🔴 -> Hard
• ⚫ -> Very Hard

Problems and Solutions

	Problem Statement	Difficulty Level	Category	Solution Link	Website Link
⭐	Two Number Sum	🟢	Arrays	Program.java	Link
⭐	Validate Subsequence	🟢	Arrays	Program.java	Link
⭐	Tournament Winner	🟢	Arrays	Program.java
⭐	Non-Constructible Change	🟢	Arrays	Program.java	Link
⭐	Sorted Squared Array	🟢	Arrays	Program.java	Link
⭐	Three Number Sum	🔵	Arrays	Program.java	Link
⭐	Smallest Difference	🔵	Arrays	Program.java	Link
⭐	Move Element To End	🔵	Arrays	Program.java	Link
⭐	Monotonic Array	🔵	Arrays	Program.java	Link
⭐	Spiral Traverse	🔵	Arrays	Program.java	Link
⭐	Longest Peak	🔵	Arrays	Program.java	Link
⭐	Array Of Products	🔵	Arrays	Program.java	Link
⭐	First Duplicate Value	🔵	Arrays	Program.java	Link
⭐	Merge Overlapping Intervals	🔵	Arrays	Program.java	Link
⭐	Four Number Sum	🔴	Arrays	Program.java	Link
⭐	Subarray Sort	🔴	Arrays	Program.java	Link
⭐	Largest Range	🔴	Arrays	Program.java	Link
⭐	Min Rewards	🔴	Arrays	Program.java	Link
⭐	Zigzag Traverse	🔴	Arrays	Program.java
⭐	Apartment Hunting	⚫	Arrays	Program.java	Link
⭐	Calendar Matching	⚫	Arrays	Program.java	Link
⭐	Waterfall Streams	⚫	Arrays	Program.java	Link
⭐	Minimum Area Rectangle	⚫	Arrays	Program.java	Link
⭐	Line Through Points	⚫	Arrays	Program.java	Link
⭐	Palindrome Check	🟢	Strings	Program.java	Link
⭐	Caesar Cypher Encryptor	🟢	Strings	Program.java	Link
⭐	Run-Length Encoding	🟢	Strings	Program.java	Link
⭐	Generate Document	🟢	Strings	Program.java
⭐	First Non-Repeating Character	🟢	Strings	Program.java
⭐	Longest Palindromic Substring	🔵	Strings	Program.java
⭐	Group Anagrams	🔵	Strings	Program.java
⭐	Valid IP Addresses	🔵	Strings	Program.java
⭐	Reverse Words In String	🔵	Strings	Program.java
⭐	Minimum Characters For Words	🔵	Strings	Program.java
⭐	Longest Substring Without Duplication	🔴	Strings	Program.java
⭐	Underscorify Substring	🔴	Strings	Program.java
⭐	Pattern Matcher	🔴	Strings	Program.java
⭐	Smallest Substring Containing	⚫	Strings	Program.java
⭐	Longest Balanced Substring	⚫	Strings	Program.java
⭐	Remove Duplicates From Linked List	🟢	Linked Lists	Program.java
⭐	Linked List Construction	🔵	Linked Lists	Program.java
⭐	Remove Kth Node From End	🔵	Linked Lists	Program.java
⭐	Sum of Linked Lists	🔵	Linked Lists	Program.java
⭐	Find Loop	🔴	Linked Lists	Program.java
⭐	Reverse Linked List	🔴	Linked Lists	Program.java
⭐	Merge Linked Lists	🔴	Linked Lists	Program.java
⭐	Shift Linked List	🔴	Linked Lists	Program.java
⭐	LRU Cache	⚫	Linked Lists	Program.java
⭐	Rearrange Linked List	⚫	Linked Lists	Program.java
⭐	Linked List Palindrome	⚫	Linked Lists	Program.java
⭐	Zip Linked List	⚫	Linked Lists	Program.java
⭐	Node Swap	⚫	Linked Lists	Program.java
⭐	Min Max Stack Construction	🔵	Stacks	Program.java
⭐	Balanced Brackets	🔵	Stacks	Program.java
⭐	Sunset Views	🔵	Stacks	Program.java
⭐	Sort Stack	🔵	Stacks	Program.java
⭐	Shorten Path	🔴	Stacks	Program.java
⭐	Largest Rectangle Under Skyline	🔴	Stacks	Program.java
⭐	Binary Search	🟢	Searching	Program.java
⭐	Find Three Largest Numbers	🟢	Searching	Program.java
⭐	Search In Sorted Matrix	🔵	Searching	Program.java
⭐	Shifted Binary Search	🔴	Searching	Program.java
⭐	Search For Range	🔴	Searching	Program.java
⭐	Quickselect	🔴	Searching	Program.java
⭐	Index Equals Value	🔴	Searching	Program.java
⭐	Bubble Sort	🟢	Sorting	Program.java
⭐	Insertion Sort	🟢	Sorting	Program.java
⭐	Selection Sort	🟢	Sorting	Program.java
⭐	Three Number Sort	🔵	Sorting	Program.java
⭐	Quick Sort	🔴	Sorting	Program.java
⭐	Heap Sort	🔴	Sorting	Program.java
⭐	Radix Sort	🔴	Sorting	Program.java
⭐	Merge Sort	⚫	Sorting	Program.java
⭐	Minimum Waiting Time	🟢	Greedy Algorithms	Program.java
⭐	Class Photos	🟢	Greedy Algorithms	Program.java
⭐	Tandem Bicycle	🟢	Greedy Algorithms	Program.java
⭐	Task Assignment	🔵	Greedy Algorithms	Program.java
⭐	Valid Starting City	🔵	Greedy Algorithms	Program.java
⭐	Min Heap Construction	🔵	Heaps	Program.java
⭐	Continuous Median	🔴	Heaps	Program.java
⭐	Sort K-Sorted Array	🔴	Heaps	Program.java
⭐	Laptop Rentals	🔴	Heaps	Program.java
⭐	Merge Sorted Arrays	⚫	Heaps	Program.java
⭐	Kadane's Algorithm	🔵	Famous Algorithms	Program.java
⭐	Dijkstra's Algorithm	🔴	Famous Algorithms	Program.java
⭐	Topological Sort	🔴	Famous Algorithms	Program.java
⭐	Knuth Morris Pratt Algorithm	⚫	Famous Algorithms	Program.java
⭐	A* Algorithm	⚫	Famous Algorithms	Program.java
⭐	Nth Fibonacci	🟢	Recursion	Program.java
⭐	Product Sum	🟢	Recursion	Program.java
⭐	Permutations	🔵	Recursion	Program.java
⭐	Powerset	🔵	Recursion	Program.java
⭐	Phone Number Mnemonics	🔵	Recursion	Program.java
⭐	Staircase Traversal	🔵	Recursion	Program.java
⭐	Lowest Common Manager	🔴	Recursion	Program.java
⭐	Interweaving Strings	🔴	Recursion	Program.java
⭐	Solve Sudoku	🔴	Recursion	Program.java
⭐	Ambiguous Measurements	🔴	Recursion	Program.java
⭐	Generate Div Tags	🔴	Recursion	Program.java
⭐	Number Of Binary Tree Topologies	⚫	Recursion	Program.java
⭐	Non Attacking Queens	⚫	Recursion	Program.java
⭐	Find Closest Value In BST	🟢	Binary Search Trees	Program.java
⭐	BST Traversal	🔵	Binary Search Trees	Program.java
⭐	BST Construction	🔵	Binary Search Trees	Program.java
⭐	Validate BST	🔵	Binary Search Trees	Program.java
⭐	Min Height BST	🔵	Binary Search Trees	Program.java
⭐	Find Kth Largest Value In BST	🔵	Binary Search Trees	Program.java
⭐	Reconstruct BST	🔵	Binary Search Trees	Program.java
⭐	Validate Three Nodes	🔴	Binary Search Trees	Program.java
⭐	Same BSTs	🔴	Binary Search Trees	Program.java
⭐	Right Smaller Than	⚫	Binary Search Trees	Program.java
⭐	Branch Sums	🟢	Binary Trees	Program.java
⭐	Node Depths	🟢	Binary Trees	Program.java
⭐	Invert Binary Tree	🔵	Binary Trees	Program.java
⭐	Binary Tree Diameter	🔵	Binary Trees	Program.java
⭐	Find Successor	🔵	Binary Trees	Program.java
⭐	Height Balanced Binary Tree	🔵	Binary Trees	Program.java
⭐	Max Path Sum In Binary Tree	🔴	Binary Trees	Program.java
⭐	Find Nodes Distance K	🔴	Binary Trees	Program.java
⭐	Iterative In-Order Traversal	⚫	Binary Trees	Program.java
⭐	Flatten Binary Tree	⚫	Binary Trees	Program.java
⭐	Right Sibling Tree	⚫	Binary Trees	Program.java
⭐	All Kinds of Node Depths	⚫	Binary Trees	Program.java
⭐	Compare Leaf Traversal	⚫	Binary Trees	Program.java
⭐	Max Subset Sum No Adjacent	🔵	Dynamic Programming	Program.java
⭐	Number Of Ways To Make Change	🔵	Dynamic Programming	Program.java
⭐	Min Number Of Coins For Change	🔵	Dynamic Programming	Program.java
⭐	Levenshtein Distance	🔵	Dynamic Programming	Program.java
⭐	Number Of Ways To Traverse Graph	🔵	Dynamic Programming	Program.java
⭐	Max Sum Increasing Subsequence	🔴	Dynamic Programming	Program.java
⭐	Longest Common Subsequence	🔴	Dynamic Programming	Program.java
⭐	Min Number of Jumps	🔴	Dynamic Programming	Program.java
⭐	Water Area	🔴	Dynamic Programming	Program.java
⭐	Knapsack Problem	🔴	Dynamic Programming	Program.java
⭐	Disk Stacking	🔴	Dynamic Programming	Program.java
⭐	Numbers In Pi	🔴	Dynamic Programming	Program.java
⭐	Maximum Sum Submatrix	🔴	Dynamic Programming	Program.java
⭐	Maximize Expression	🔴	Dynamic Programming	Program.java
⭐	Max Profit With K Transactions	⚫	Dynamic Programming	Program.java
⭐	Palindrome Partitioning Min Cuts	⚫	Dynamic Programming	Program.java
⭐	Longest Increasing Subsequence	⚫	Dynamic Programming	Program.java
⭐	Longest String Chain	⚫	Dynamic Programming	Program.java
⭐	Square Of Zeroes	⚫	Dynamic Programming	Program.java
⭐	Depth-First Search	🟢	Graphs	Program.java
⭐	Single Cycle Check	🔵	Graphs	Program.java
⭐	Breadth-First Search	🔵	Graphs	Program.java
⭐	River Sizes	🔵	Graphs	Program.java
⭐	Youngest Common Ancestor	🔵	Graphs	Program.java
⭐	Remove Islands	🔵	Graphs	Program.java
⭐	Cycle In Graph	🔵	Graphs	Program.java
⭐	Minimum Passes Of Matrix	🔵	Graphs	Program.java
⭐	Boggle Board	🔴	Graphs	Program.java
⭐	Rectangle Mania	⚫	Graphs	Program.java
⭐	Airport Connections	⚫	Graphs	Program.java
⭐	Detect Arbitrage	⚫	Graphs	Program.java
⭐	Two-Edge Connected Graph	⚫	Graphs	Program.java
⭐	Suffix Trie Construction	🔵	Tries	Program.java
⭐	Multi String Search	🔴	Tries	Program.java

Contributing

Pull requests and contributions are welcome. For major changes, please open an issue first to discuss what you would like to change.

Ensure to follow the guidelines and update tests as appropriate.

Contact Info

If you have any question or want to reach me directly, Contact Nsikak Imoh.

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