LeetCode Solutions in Java

• Check valid sequence from root to leaves in a BTree
• Binary Tree Maximum Path Sum
• First Unique Number
• Maximal Square
• Longest Common Subsequence
• Jump Game
• Max Consecutive Ones
• Find Numbers with Even Number of Digits
• Squares of a Sorted Array
• First Bad Version
• Jewels and Stones
• Ransom Note
• Number Complement
• First Unique Character in a String
• Majority Element
• Cousins in Binary Tree
• Check If It Is a Straight Line
• Valid Perfect Square
• Find the Town Judge
• Flood Fill problem
• Single Element in a Sorted Array
• Remove K Digits
• Implement Trie (Prefix Tree)
• Maximum Sum Circular Subarray
• Odd Even Linked List
• Find All Anagrams in a String
• Permutation in String
• Online Stock Span
• Kth Smallest Element in a BST
• Count Square Submatrices with All Ones
• Sort Characters By Frequency
• Interval List Intersections
• Construct Binary Search Tree from Preorder Traversal
• Uncrossed Lines
• Contiguous Array
• Possible Bipartition
• Counting Bits
• Course Schedule
• K Closest Points to Origin
• Edit Distance
• Invert Binary
• Delete Node in a Linked List
• Two City Scheduling
• Reverse String
• Queue Reconstruction by Height
• Coin Change 2
• Power Of Two
• Maximum consecutive one's 
• Find Second Highest Number From An Array
• Detect Capital
• Design HashSet
• Valid Palindrome
• Power of Four
• Add and Search Word - Data structure design
• Vertical Order Traversal of a Binary Tree
• Path Sum III
• Rotting Oranges