LeetCode Easy Solutions LeetCode Problem Solution 1. Two Sum TwoSum.java 9. Palindrome Number PalindromeNumber.java 13. Roman To Integer RomanToInteger.java 14. Longest Common Prefix LongestCommonPrefix.java 20. Valid Parentheses ValidParentheses.java 21. Merge Two Sorted Lists MergeTwoSortedLists.java 26. Remove Duplicates from Sorted Array RemoveDuplicatesFromSortedArray.java 27. Remove Element RemoveElement.java 58. Length of Last Word LengthOfLastWord.java 88. Merge Sorted Array MergeSortedArray.java 94. Binary Tree Inorder Traversal BinaryTreeInorderTraversal.java 101. Symmetric Tree SymmetricTree.java 104. Maximum Depth of Binary Tree MaximumDepthOfBinaryTree.java 110. Balanced Binary Tree BalancedBinaryTree.java 111. Minimum Depth for Binary Tree MinimumDepthOfBinaryTree.java 112. Path Sum PathSum.java 118. Pascal's Triangle PascalsTriangle.java 121. Best Time to Buy and Sell Stock BestTimeToBuyAndSellStock.java 141. Linked List Cycle LinkedListCycle.java 169. Majority Element MajorityElement.java 206. Reverse Linked List ReverseLinkedList.java 226. Invert Binary Tree InvertBinaryTree.java 896. Monotonic Array MonotonicArray.java 929. Unique Email Addresses UniqueEmailAddresses.java 1710. Maximum Units on a Truck MaximumUnitsOnATruck.java 2269. Find the K-Beauty of a Number FindTheK-BeautyOfANumber.java