LeetCode LeetCode - JavaScript Solutions Easy 1. Two Sum 7. Reverse Integer 9. Palindrome Number 13. Roman to Integer 14. Longest Common Prefix 20. Valid Parentheses 21. Merge Two Sorted Lists 26. Remove Duplicates from Sorted Array 27. Remove Element 28. Implement strStr() 35. Search Insert Position 38. Count and Say 53. Maximum Subarray 58. Length of Last Word 66. Plus One 67. Add Binary 69. Sqrt(x) 70. Climbing Stairs 83. Remove Duplicates from Sorted List 88. Merge Sorted Array 100. Same Tree 101. Symmetric Tree 104. Maximum Depth of Binary Tree 107. Binary Tree Level Order Traversal II 108. Convert Sorted Array to Binary Search Tree Medium