Leetcode solutions in Java

My accepted leetcode solutions to some of the common interview problems. Also, some solutions have youtube video link.

Youtube channel

Array

• Pascals Traiangle II (Easy)
• Product Of Array Except Self (Medium)
• Rotate Matrix (Medium)
• Set Matrix Zeroes (Medium)
• Third Maximum Number (Easy)
• Two Sum (Easy)
• TwoSum II (Easy)
• Can Place Flowers (Easy)
• Merge Intervals (Medium)
• First Missing Positive (Hard)
• Fruit Into Baskets (Medium)
• MaxProduct Of Three Numbers (Easy)
• Missing Number (Easy)
• Merge Sorted Array (Easy)
• Rotate Array (Easy)
• Sort Colors (Medium)
• Battleships in a Board (Medium)
• Find the Celebrity (Medium)
• Meeting Rooms (Easy)
• Longest Continuous Increasing Subsequence (Easy)
• Sparse Matrix Multiplication (Medium)
• Read N Characters Given Read4 (Easy)
• Maximum Swap (Medium)
• H-Index (Medium)
• Insert Interval (Hard)
• Increasing Triplet Subsequence (Medium)
• K Empty Slots (Hard)
• Subarray Sum Equals K (Medium)
• Pour Water (Medium)
• Relative Ranks (Easy)
• Next Greater Element I (Easy)
• Largest Number At Least Twice of Others (Easy)
• Minimum Moves to Equal Array Elements II (Median)
• Image Smoother (Easy)
• Minimum Index Sum of Two Lists (Easy)
• Card Flipping Game (Medium)
• Employee Free Time (Hard)
• Best Meeting Point (Hard)
• My Calendar III (Hard)
• Champagne Tower (Medium)
• Valid Tic-Tac-Toe State (Medium)
• Number of Subarrays with Bounded Maximum (Medium)
• Surface Area of 3D Shapes (Easy)
• Max Consecutive Ones (Easy)
• Max Consecutive Ones II (Medium)
• Add to Array-Form of Integer (Easy)
• Find Pivot Index (Easy)
• Largest Time for Given Digits (Easy)
• Minimum Time Difference (Medium)
• Reveal Cards In Increasing Order (Medium)
• Sort Array By Parity II (Easy)
• Matrix Cells in Distance Order (Easy)
• Maximum Sum of Two Non-Overlapping Subarrays (Medium)
• Longest Line of Consecutive One in Matrix (Medium)
• Array Partition I (Easy)
• Relative Sort Array (Easy)
• Meeting Scheduler (Medium)
• Minimum Swaps to Group All 1's Together (Medium)
• Array Nesting (Medium)

Backtracking

• Combinations (Medium)
• Combinations Sum (Medium)
• Combinations Sum II (Medium)
• Letter Phone Number (Medium)
• Paliandrome Partitioning (Medium)
• Permutations (Medium)
• Permutations II (Medium)
• SubSets (Medium)
• SubSet II (Medium)
• Word Search (Medium)
• Word Search II (Hard)
• Generate Parentheses (Medium)
• Remove Invalid Parentheses (Hard)
• Regular Expression Matching (Hard)
• Expression Add Operators (Hard)
• Wildcard Matching (Hard)
• Letter Case Permutation (Easy)
• Zuma Game (Hard)
• Matchsticks to Square (Medium)

Binary Search

• Minimum Sorted Rotated Array (Medium)
• Search in a Rotated Sorted Array (Medium)
• Search for a Range (Medium)
• Sqrt(x) (Easy)
• Search Insert Position (Easy)
• Median of Two Sorted Arrays (Hard)
• Pow(x, n) (Medium)
• Find Peak Element (Medium)
• Target Sum (Medium)
• H-Index II (Medium)
• Swim in Rising Water (Hard)
• Time Based Key-Value Store (Medium)
• Minimum Window Subsequence (Hard)
• Koko Eating Bananas (Hard)
• Single Element in a Sorted Array (Medium)
• Minimize the Maximum Adjacent Element Difference (Hard)
  • Youtube video explanation

Bit Manipulation

• Gray Code (Medium)
• Hamming Distance (Easy)
• Total Hamming Distance (Medium)
• Divide Two Integers (Medium)
• Binary Number with Alternating Bits (Easy)
• Binary Watch (Easy)

Breadth First Search

• Binaray Tree Level Order Traversal (Medium)
• Word Ladder (Medium)
• Word Ladder II