| [Next Greater Element I](https://leetcode.com/problems/next-greater-element-i/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/NextGreaterElementI.java) | LeetCode Online Judge |

| [Implement Queue using Stacks](https://leetcode.com/problems/implement-queue-using-stacks/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/ImplementQueueusingStacks.java) | LeetCode Online Judge |

| [Rotate Array]( https://leetcode.com/problems/reshape-the-matrix/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/ReshapetheMatrix.java) | LeetCode Online Judge |

| [Rotate Array](https://leetcode.com/problems/rotate-array/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/RotateArray.java) | LeetCode Online Judge |

| [Best Time to Buy and Sell Stock](https://leetcode.com/problems/best-time-to-buy-and-sell-stock/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/BestTimeBuySellStock.java) | LeetCode Online Judge |Dynamic P.|

| [Simplify Path](https://leetcode.com/problems/simplify-path/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/SimplifyPath.java) | LeetCode Online Judge |

| [Evaluate Reverse Polish Notation](https://leetcode.com/problems/evaluate-reverse-polish-notation/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/EvaluateReversePolishNotation.java) | LeetCode Online Judge |

| [Contains Duplicate](https://leetcode.com/problems/contains-duplicate/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/ContainsDuplicate.java) | LeetCode Online Judge |

| [Decode String](https://leetcode.com/problems/decode-string/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/DecodeString.java) | LeetCode Online Judge |

| [Search a 2D Matrix](https://leetcode.com/problems/search-a-2d-matrix/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/Search2DMatrix.java) | LeetCode Online Judge |

| [Range Sum Query 2D - Immutable](https://leetcode.com/problems/range-sum-query-2d-immutable/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/NumMatrix.java) | LeetCode Online Judge |Dynamic P.|

| [Valid Anagram](https://leetcode.com/problems/valid-anagram/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/ValidAnagram.java) | LeetCode Online Judge |

| [Longest Word in Dictionary through Deleting](https://leetcode.com/problems/longest-word-in-dictionary-through-deleting/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/LongestWordDictionarythroughDeleting.java) | LeetCode Online Judge |

| [Sort List](https://leetcode.com/problems/sort-list/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/SortListTest.java) | LeetCode Online Judge |

| [Sort Colors](https://leetcode.com/problems/sort-colors/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/SortColors.java) | LeetCode Online Judge |

|105| [Maximum Subarray](https://leetcode.com/problems/maximum-subarray/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/MaximumSubarray.java) | LeetCode Online Judge |

|106| [Range Sum Query - Immutable](https://leetcode.com/problems/range-sum-query-immutable/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/NumArray.java) | LeetCode Online Judge |Dynamic P.|

|107| [House Robber](https://leetcode.com/problems/house-robber/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/HouseRobber.java) | LeetCode Online Judge |Dynamic P.|

|108| [Single Number](https://leetcode.com/problems/single-number/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/SingleNumber.java) | LeetCode Online Judge |

|109| [Happy Number](https://leetcode.com/problems/happy-number/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/HappyNumber.java) | LeetCode Online Judge |

|110| [Count Primes](https://leetcode.com/problems/count-primes/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/CountPrimes.java) | LeetCode Online Judge |

|111| [Word Pattern](https://leetcode.com/problems/word-pattern/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/WordPattern.java) | LeetCode Online Judge |Hash Table |

|112| [Keyboard Row](https://leetcode.com/problems/keyboard-row/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/KeyboardRow.java) | LeetCode Online Judge |HashTable|

|113| [Longest Harmonious Subsequence](https://leetcode.com/problems/longest-harmonious-subsequence/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/LongestHarmoniousSubsequence.java) | LeetCode Online Judge |HashMap |

|114| [Binary Tree Inorder Traversal](https://leetcode.com/problems/binary-tree-inorder-traversal/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/BinaryTreeInorderTraversal.java) | LeetCode Online Judge | Tree |

|115| [Clone Graph](https://leetcode.com/problems/clone-graph/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/CloneGraph.java) | LeetCode Online Judge |Graph,BFS|

|116| [Merge Two Binary Trees](https://leetcode.com/problems/merge-two-binary-trees/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/MergeTwoBinaryTrees.java) | LeetCode Online Judge |Tree |

|117| [Subtree of Another Tree](https://leetcode.com/problems/subtree-of-another-tree/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/SubtreeAnotherTree.java) | LeetCode Online Judge |Tree |

|118| [Binary Tree Tilt](https://leetcode.com/problems/binary-tree-tilt/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/BinaryTreeTilt.java) | LeetCode Online Judge |Tree |

|119| [Diameter of Binary Tree](https://leetcode.com/problems/diameter-of-binary-tree/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/DiameterBinaryTree.java) | LeetCode Online Judge |Tree, DFS |

|120| [Path Sum](https://leetcode.com/problems/path-sum/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/PathSum.java) | LeetCode Online Judge |Tree |

|121| [Remove Duplicates from Sorted List](https://leetcode.com/problems/remove-duplicates-from-sorted-list/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/RemoveDuplicatesfromSortedList.java) | LeetCode Online Judge |LinkedList |

|122| [Rotate List](https://leetcode.com/problems/rotate-list/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/RotateList.java) | LeetCode Online Judge |LinkedList |

|123| [Reverse Linked List](https://leetcode.com/problems/reverse-linked-list/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/ReverseLinkedList.java) | LeetCode Online Judge | |

|124| [Guess Number Higher or Lower](https://leetcode.com/problems/guess-number-higher-or-lower/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/GuessNumberHigherorLower.java) | LeetCode Online Judge |BS |

|125| [Two Sum II - Input array is sorted](https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/TwoSumIInputarrayissorted.java) | LeetCode Online Judge |BS |

|126| [Beautiful Arrangement](https://leetcode.com/problems/beautiful-arrangement/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/BeautifulArrangement.java) | LeetCode Online Judge |Backtracking |

|127| [Delete Operation for Two Strings](https://leetcode.com/problems/delete-operation-for-two-strings/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/DeleteOperationforTwoStrings.java) | LeetCode Online Judge |DP |

|128| [Construct String from Binary Tree](https://leetcode.com/problems/construct-string-from-binary-tree/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/ConstructStringfromBinaryTree.java) | LeetCode Online Judge |Tree |

|129| [Optimal Division](https://leetcode.com/problems/optimal-division/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/OptimalDivision.java) | LeetCode Online Judge |String |

|130| [Count and Say](https://leetcode.com/problems/count-and-say/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/CountandSay.java) | LeetCode Online Judge | |

|131| [Merge Sorted Array](https://leetcode.com/problems/merge-sorted-array/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/MergeSortedArray.java) | LeetCode Online Judge | |

|132| [Permutations](https://leetcode.com/problems/permutations/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/Permutations.java) | LeetCode Online Judge |Backtracking |

|133| [Maximum Distance in Arrays](https://leetcode.com/problems/maximum-distance-in-arrays/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/MaximumDistanceinArrays.java) | LeetCode Online Judge | |

|134| [Fizz Buzz](https://leetcode.com/problems/fizz-buzz/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/FizzBuzz.java) | LeetCode Online Judge | |

|135| [Reverse String](https://leetcode.com/problems/reverse-string/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/ReverseString.java) | LeetCode Online Judge | |

|136| [Move Zeroes](https://leetcode.com/problems/move-zeroes/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/MoveZeroes.java) | LeetCode Online Judge | |

|137| [Missing Number](https://leetcode.com/problems/missing-number/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/MissingNumber.java) | LeetCode Online Judge | |

|138| [Repeated DNA Sequences](https://leetcode.com/problems/repeated-dna-sequences/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/RepeatedDNASequences.java) | LeetCode Online Judge | |

|139| [Sum of Square Numbers](https://leetcode.com/problems/sum-of-square-numbers/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/SumofSquareNumbers.java) | LeetCode Online Judge | |

|140| [Sum of Two Integers](https://leetcode.com/problems/sum-of-two-integers/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/SumofTwoIntegers.java) | LeetCode Online Judge | Bit M. |

|141| [Excel Sheet Column Number](https://leetcode.com/problems/excel-sheet-column-number/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/ExcelSheetColumnNumber.java) | LeetCode Online Judge | |

|142| [Array Partition I](https://leetcode.com/problems/array-partition-i/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/ArrayPartitionI.java) | LeetCode Online Judge |MergeSort |

|143| [Max Consecutive Ones](https://leetcode.com/problems/max-consecutive-ones/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/MaxConsecutiveOnes.java) | LeetCode Online Judge | |

|144| [Triangle](https://leetcode.com/problems/triangle/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/Triangle.java) | LeetCode Online Judge | |

|145| [Minimum Path Sum](https://leetcode.com/problems/minimum-path-sum/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/MinimumPathSum.java) | LeetCode Online Judge | |

|146| [ Summary Ranges](https://leetcode.com/problems/summary-ranges/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/SummaryRanges.java) | LeetCode Online Judge | |

|147| [Partition List](https://leetcode.com/problems/partition-list/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/PartitionList.java) | LeetCode Online Judge | |

|148| [Linked List Cycle](https://leetcode.com/problems/linked-list-cycle/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/LinkedListCycleHas.java) | LeetCode Online Judge |LinkedList |

|149| [Reorder List](https://leetcode.com/problems/reorder-list/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/ReorderList.java) | LeetCode Online Judge |LinkedList |

|150| [Balanced Binary Tree](https://leetcode.com/problems/balanced-binary-tree/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/BalancedBinaryTree.java) | LeetCode Online Judge |Tree |

|151| [Validate Binary Search Tree](https://leetcode.com/problems/validate-binary-search-tree/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/ValidateBinarySearchTree.java) | LeetCode Online Judge |Tree |

|152| [Invert Binary Tree](https://leetcode.com/problems/invert-binary-tree/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/InvertBinaryTree.java) | LeetCode Online Judge | |

|153| [Binary Tree Paths](https://leetcode.com/problems/binary-tree-paths/#/description) | [Java](https://github.com/edyluisrey/Leetcode-Algorithms/blob/master/src/leetcode/BinaryTreePaths.java) | LeetCode Online Judge |DFS |

|154| [Find Mode in Binary Search Tree](https://leetcode.com/problems/find-mode-in-binary-search-tree/#/description) | [Java]() | LeetCode Online Judge | |

|155| [Path Sum III](https://leetcode.com/problems/path-sum-iii/#/description) | [Java]() | LeetCode Online Judge |Tree |

|156| [Binary Tree Level Order Traversal](https://leetcode.com/problems/binary-tree-level-order-traversal/#/description) | [Java]() | LeetCode Online Judge | |

|157| [ Binary Tree Level Order Traversal II](https://leetcode.com/problems/binary-tree-level-order-traversal-ii/#/description) | [Java]() | LeetCode Online Judge | |

|158| [Average of Levels in Binary Tree](https://leetcode.com/problems/average-of-levels-in-binary-tree/#/description) | [Java]() | LeetCode Online Judge | |

|159| [Reverse Nodes in k-Group](https://leetcode.com/problems/reverse-nodes-in-k-group/#/description) | [Java]() | LeetCode Online Judge |Tree |

|160| [Maximum Product Subarray](https://leetcode.com/problems/maximum-product-subarray/#/description) | [Java]() | LeetCode Online Judge | |

|161| [Kth Largest Element in an Array](https://leetcode.com/problems/kth-largest-element-in-an-array/#/description) | [Java]() | LeetCode Online Judge | |

|162| [Kth Smallest Element in a BST](https://leetcode.com/problems/kth-smallest-element-in-a-bst/#/description) | [Java]() | LeetCode Online Judge | |

|163| [Rotate List](https://leetcode.com/problems/rotate-list/#/description) | [Java]() | LeetCode Online Judge | |

|164| [Combinations](https://leetcode.com/problems/combinations/#/description) | [Java]() | LeetCode Online Judge | |

|165| [Path Sum II](https://leetcode.com/problems/path-sum-ii/#/description) | [Java]() | LeetCode Online Judge | |

|166| [Sum Root to Leaf Numbers](https://leetcode.com/problems/sum-root-to-leaf-numbers/#/description) | [Java]() | LeetCode Online Judge | |

|167| [Maximum Average Subarray I](https://leetcode.com/problems/maximum-average-subarray-i/#/description) | [Java]() | LeetCode Online Judge | |

|168| [Combination Sum](https://leetcode.com/problems/combination-sum/#/description) | [Java]() | LeetCode Online Judge | |