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This repository contains [in progress] solutions to 150 LeetCode problems, meticulously curated to cover a broad range of interview topics. Each solution is accompanied by detailed explanations and optimized code. Most of the solutions follows neetcode.io examples

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Problem 1. Two Sum
Problem 1. Two Sum
 
 
Problem 100. Same Tree
Problem 100. Same Tree
 
 
Problem 1074. Number of Submatrices that Sum up to Target
Problem 1074. Number of Submatrices that Sum up to Target
 
 
Problem 1143. Longest Common Subsequence
Problem 1143. Longest Common Subsequence
 
 
Problem 121. Best Time to Buy and Sell Stock
Problem 121. Best Time to Buy and Sell Stock
 
 
Problem 122. Best Time to Buy and Sell Stocks II
Problem 122. Best Time to Buy and Sell Stocks II
 
 
Problem 1239. Maximum Length of a Concatenated String with Unique Characters
Problem 1239. Maximum Length of a Concatenated String with Unique Characters
 
 
Problem 125. Valid Palindriome
Problem 125. Valid Palindriome
 
 
Problem 1291. Sequential Data
Problem 1291. Sequential Data
 
 
Problem 13. Roman to Integer
Problem 13. Roman to Integer
 
 
Problem 134. Gas Station
Problem 134. Gas Station
 
 
Problem 14. Longest Common Prefix
Problem 14. Longest Common Prefix
 
 
Problem 141. Linked List Cycle
Problem 141. Linked List Cycle
 
 
Problem 1457. Pseudo-Palindromic Binary Paths
Problem 1457. Pseudo-Palindromic Binary Paths
 
 
Problem 1463. Cherry Pickup II
Problem 1463. Cherry Pickup II
 
 
Problem 1481. Least Number of Unique Integers after K Removals
Problem 1481. Least Number of Unique Integers after K Removals
 
 
Problem 150. Evaluate Polish Notation
Problem 150. Evaluate Polish Notation
 
 
Problem 1642. Furthest Building You Can Reach
Problem 1642. Furthest Building You Can Reach
 
 
Problem 1669. Merge In Between Linked Lists
Problem 1669. Merge In Between Linked Lists
 
 
Problem 169. Majority Element
Problem 169. Majority Element
 
 
Problem 1750. Minimum Length of String After Deleting Similar Ends
Problem 1750. Minimum Length of String After Deleting Similar Ends
 
 
Problem 189. Rotate Array
Problem 189. Rotate Array
 
 
Problem 198. House Robber
Problem 198. House Robber
 
 
Problem 20. Valid Parentheses
Problem 20. Valid Parentheses
 
 
Problem 201. Bitwise AND for Numbers Range
Problem 201. Bitwise AND for Numbers Range
 
 
Problem 205. Isomorphic Strings
Problem 205. Isomorphic Strings
 
 
Problem 206. Reverse Linked List
Problem 206. Reverse Linked List
 
 
Problem 209. Minimum size subarray sum
Problem 209. Minimum size subarray sum
 
 
Problem 2108. Find First Palindromic String
Problem 2108. Find First Palindromic String
 
 
Problem 2149. Rearrange array by sign
Problem 2149. Rearrange array by sign
 
 
Problem 224. Basic Calculator
Problem 224. Basic Calculator
 
 
Problem 228. Summary Ranges
Problem 228. Summary Ranges
 
 
Problem 231. The Power of Two
Problem 231. The Power of Two
 
 
Problem 232. Implement Queue using Stacks
Problem 232. Implement Queue using Stacks
 
 
Problem 238. Product of Array Except Self
Problem 238. Product of Array Except Self
 
 
Problem 2402. Meeting Rooms III
Problem 2402. Meeting Rooms III
 
 
Problem 2540. Minimum Common Value
Problem 2540. Minimum Common Value
 
 
Problem 26. Remove Duplicates from Sorted Array
Problem 26. Remove Duplicates from Sorted Array
 
 
Problem 268. Missing number
Problem 268. Missing number
 
 
Problem 2709. Greatest Common Divisor Traversal
Problem 2709. Greatest Common Divisor Traversal
 
 
Problem 279. Perfect Squares
Problem 279. Perfect Squares
 
 
Problem 2864. Maximum Odd Binary Number
Problem 2864. Maximum Odd Binary Number
 
 
Problem 287. Find the Duplicate Number
Problem 287. Find the Duplicate Number
 
 
Problem 2870. Minimum Number of Operations to Make Array Empty
Problem 2870. Minimum Number of Operations to Make Array Empty
 
 
Problem 2966. 2966. Divide Array Into Arrays With Max Difference
Problem 2966. 2966. Divide Array Into Arrays With Max Difference
 
 
Problem 2971. Find Polygon With the Largest Perimeter
Problem 2971. Find Polygon With the Largest Perimeter
 
 
Problem 3005. Count Elements With Maximum Frequency
Problem 3005. Count Elements With Maximum Frequency
 
 
Problem 349. Intersection of Two Arrays
Problem 349. Intersection of Two Arrays
 
 
Problem 35. Search Insert Position
Problem 35. Search Insert Position
 
 
Problem 36. Valid Sudoku
Problem 36. Valid Sudoku
 
 
Problem 383. Ransom note
Problem 383. Ransom note
 
 
Problem 387. First Unique Character in a String
Problem 387. First Unique Character in a String
 
 
Problem 392. Is subsequence?
Problem 392. Is subsequence?
 
 
Problem 41. First Missing Positive
Problem 41. First Missing Positive
 
 
Problem 442. Find All Duplicates in an Array
Problem 442. Find All Duplicates in an Array
 
 
Problem 45. Jump Game II
Problem 45. Jump Game II
 
 
Problem 451. Sort Characters By Frequency
Problem 451. Sort Characters By Frequency
 
 
Problem 455. Assign Cookies
Problem 455. Assign Cookies
 
 
Problem 49. Group Anagrams
Problem 49. Group Anagrams
 
 
Problem 543. Diameter of Binary Tree
Problem 543. Diameter of Binary Tree
 
 
Problem 55. Jump Game
Problem 55. Jump Game
 
 
Problem 576. Out of Boundary Path
Problem 576. Out of Boundary Path
 
 
Problem 621. Inverse Pairs Array
Problem 621. Inverse Pairs Array
 
 
Problem 645. Set Mismatch
Problem 645. Set Mismatch
 
 
Problem 66. Plus One
Problem 66. Plus One
 
 
Problem 69. Sqrt(x)
Problem 69. Sqrt(x)
 
 
Problem 70. Climbing Stairs
Problem 70. Climbing Stairs
 
 
Problem 704. Binary Search
Problem 704. Binary Search
 
 
Problem 713. Subarray Product Less Than K
Problem 713. Subarray Product Less Than K
 
 
Problem 739. Daily Temperatures
Problem 739. Daily Temperatures
 
 
Problem 787. Cheapest Flights Within K Stops
Problem 787. Cheapest Flights Within K Stops
 
 
Problem 79. Word Search
Problem 79. Word Search
 
 
Problem 791. Custom Sort String
Problem 791. Custom Sort String
 
 
Problem 80. Remove Duplicates from Sorted Array II
Problem 80. Remove Duplicates from Sorted Array II
 
 
Problem 876. Middle of the Linked List
Problem 876. Middle of the Linked List
 
 
Problem 88. Merge sorted array
Problem 88. Merge sorted array
 
 
Problem 9. Palindrome number
Problem 9. Palindrome number
 
 
Problem 930. Binary Subarrays With Sum
Problem 930. Binary Subarrays With Sum
 
 
Problem 931. Minimum Falling Path Sum
Problem 931. Minimum Falling Path Sum
 
 
Problem 938. Range Sum of BST
Problem 938. Range Sum of BST
 
 
Problem 948. Bag of Tokens
Problem 948. Bag of Tokens
 
 
Problem 997. Find the Town Judge
Problem 997. Find the Town Judge
 
 
SQL problems/Leetcode SQL50/Problem 602. Friend Requests II: Who Has the Most Friends
SQL problems/Leetcode SQL50/Problem 602. Friend Requests II: Who Has the Most Friends
 
 
.DS_Store
.DS_Store
 
 
README.md
README.md
 
 

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LeetCode Interview Prep 🚀

Welcome to my LeetCode Interview Preparation Repository! Here, you'll find solutions to 150 carefully selected interview prep problems to help you ace your coding interviews. 🌟

Table of Contents 📋

Introduction 💡

This repository contains [in progress] solutions to 150 LeetCode problems, meticulously curated to cover a broad range of interview topics. Each solution is accompanied by detailed explanations and optimized code. Most of the solutions follows neetcode.io examples

Features ✨

  • Comprehensive Coverage: Solutions for various problem categories including Arrays, Strings, Linked Lists, Trees, Dynamic Programming, and more!
  • Explanations: Detailed explanations to help you understand the thought process behind each solution.
  • Optimized Code: Efficient and clean code with explanations for better understanding.
  • Easy Navigation: Organized folder structure for easy navigation and quick reference.

Problem Categories 🧩

  • Arrays 📊
  • Strings 🧵
  • Linked Lists 🔗
  • Trees 🌳
  • Dynamic Programming 🚀
  • Sorting and Searching 🔍
  • Graphs 📈
  • Bit Manipulation 💻
  • Greedy Algorithms 💰
  • Math 🧮

... and many more!

Getting Started 🚀

  1. Clone the repository: git clone https://github.com/ivanovsdesign/leetcode_150_interview_prep
  2. Navigate to the problem category of your choice.
  3. Explore the solutions and explanations!
cd leetcode_150_interview_prep

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This repository contains [in progress] solutions to 150 LeetCode problems, meticulously curated to cover a broad range of interview topics. Each solution is accompanied by detailed explanations and optimized code. Most of the solutions follows neetcode.io examples

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leetcode-solutions leetcode-python3 neetcode neetcode150

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