LeetCode-Scala

Solutions in Scala to LeetCode Problems

Problems

Easy Problems

Problem Name	Problem Name	Scala Solution
1	Two Sum	TwoSum
2	Length of Last Word	LengthOfLastWord
3	Valid Parentheses	ValidParentheses
4	Palindrome Number	PalindromeProblem
5	Remove Duplicates from Sorted Array	RemoveDuplicates
6	Best Time to Buy and Sell Stock	BestTimeToBuyStock
7	Binary Tree Inorder Traversal	BinaryTreeInorderTraversal
8	Climbing Stairs	ClimbingStairs
9	Maximum Subarray	MaximumSubarray
10	Most Common Word	MostCommonWords
11	Missing Number	MissingNumber
12	Search Insert Position	SearchInsertPositionProblem
13	Implement strStr()	StringStr
14	Valid Anagram	ValidAnagram
15	RomanInteger	RomanInteger
16	RemoveElement	RemoveElement
17	Remove Duplicates from Sorted Array	RemoveDuplicatesSortedArray
18	Contains Duplicate	ContainsDuplicates
19	Word Pattern	WordPattern
20	Contains Duplicate II	ContainsDuplicatesII
21	Valid Palindrome	ValidPalindrome
22	Valid Palindrome II	ValidPalindromeII
23	First Unique Character in a String	FirstUniqueChar
24	Ransom Note	RansomNote
25	Find the Difference	FindDifference
26	Reverse Linked List	ReverseLinkedList
27	Merge Two Sorted Lists	MergeSortedLists
28	Intersection of Two Arrays	IntersectionTwoArrays
29	Intersection of Two Arrays II	IntersectionTwoArraysII
30	Max Consecutive Ones	MaxConsecutiveOnes
31	Consecutive Characters	ConsecutiveCharacters
32	Longer Contiguous Segments of Ones than Zeros	LongerContiguousSegments
33	Fibonacci Number	FibonacciNumber
34	Find Common Characters	FindCommonCharacters
35	Best Time to Buy Sell Stock	BestTimeBuySellStock
36	Min Cost Climbing Stairs	MinCostClimbingStairs
37	Check if Binary String Has at Most One Segment of Ones	MostOneSegmentOfOnes
38	Same Tree	SameTree
39	Maximum Product of Three Numbers	MaximumProductThreeNumbers
40	Find the K-Beauty of a Number	KBeautyNumber
41	Longest Palindrome	LongestPalindrome
42	Min Stack	MinStack
43	Peak Index in a Mountain Array	PeekIndexInMountainArray
44	Palindrome Linked List	PalindromeLinkedList
45	Midle of the Linked List	MiddleLinkedList
46	Remove Duplicates from Sorted List	RemoveDuplicatesFromSortedLinkedList
47	Linked List Cycle	LinkedListCycle
48	Remove Linked List Elements	RemoveLinkedListElements
49	Design HashSet	DesignHashSet
50	Design HashMap	DesignHashMap
51	Move Zeroes	MoveZeros
52	Summary Ranges	SummaryRanges
53	Transpose Matrix	TransposeMatrix
54	Running Sum of 1d Array	RunningSum1dArray
55	Merge Sorted Array	MergeSortedArray
56	Squares of a Sorted Array	SquaresSortedArray
57	ReplaceElementsWithGreatestElementOnRightSide	ReplaceElementsWithGreatestElementOnRightSide
58	SqrtX	SqrtX
59	Path Sum	PathSum
60	Merge Two Binary Trees	MergeTwoBinaryTrees
61	Convert Sorted Array to Binary Search Tree	ConcertSortedArrayToBinarySearchTree
62	Most Frequent Even Element	MostFrequentEvenElement
63	Rotate Array	RotateArray
64	Convert Binary Number in a Linked List to Integer	ConvertLinkedListToBinaryNumber
65	Check If Two String Arrays are Equivalent	CheckIfTwoStringArraysAreEquivalent
66	Intersection of Two Linked Lists	IntersectionOfTwoLinkedLists
67	Balanced Binary Tree	BalancedBinaryTree
68	Binary Tree Paths	BinaryTreePaths
69	Sum of Left Leaves	SumOfLeftLeaves
70	Subtree of Another Tree	SubtreeOfAnotherTree
71	Construct String from Binary Tree	ConstructStringFromBinaryTree
72	Average of Levels in Binary Tree	AverageLevelsInBinaryTree
73	N-ary Tree Preorder Traversal	NTreePreorderTraversal
74	N-ary Tree Postorder Traversal	NTreePostorderTraversal
75	Counting Bits	CountingBits
76	Find Pivot Index	FindPivotIndex
77	Is Subsequence	IsSubsequence
78	Toeplitz Matrix	ToeplitzMatrix
79	Maximum Depth of N-ary Tree	MaximumDepthOfNTree
80	First Bad Version	FirstBadVersn
81	Reverse Vowels of a String	ReverseVowelsOfAString
82	Maximum 69 Number	Maximum69Number
83	Make The String Great	MakeTheStringGreat
84	Remove All Adjacent Duplicates In String	RemoveAllAdjacentDuplicatesInString
85	Add to Array-Form of Integer	AddToArrayFormOfInteger
86	Binary Search	BinarySearch
87	Flood Fill	FloodFill
88	Guess Number Higher or Lower	GuessNumberHigherOrLower
89	Ugly Number	UglyNumber
90	N-th Tribonacci Number	NTribonacciNumber
91	Determine if String Halves Are Alike	DetermineIfStringHalvesAreAlike
92	Range Sum Of Bst	RangeSumOfBst
93	Leaf-Similar Trees	LeafSimilarTrees
94	Implement Queue using Stacks	ImplementQueueUsingStacks
95	Longest Subsequence With Limited Sum	LongestSubsequenceWithLimitedSum

Medium Problems

Problem Name	Problem Name	Scala Solution
1	Two Sum II	TwoSumII
2	Add Two Numbers	AddTwoNumbers
3	HouseRobber	HouseRobber
4	LongestPalindromicSubstring	LongestPalindromicSubstring
5	atoi	AtoiProblem
6	LongestSubstring	LongestSubstring
7	Reverse Integer	Reverse Integer
8	Maximum Product Subarray	MaximumProductSubarray
9	3Sum	3Sum
10	Letter Combinations of a Phone Number	PhoneNumberLetterCombinations
11	Remove Nth Node From End of List	RemoveNthNodeFromEndOfList
12	Zigzag Conversion	ZigzagConversion
13	Container With Most Watter	ContainerWithMostWatter
14	Group Anagrams	Group Anagrams
15	Swap Nodes in Pairs	SwapNodesInPairs
16	Search in Rotated Sorted Array	SearchTargetInRotatedSortedArray
17	Integer to Roman	IntegerToRoman
18	Find First and Last Position of Element in Sorted Array	FirstLastPositionOfElementInSortedArray
19	Permutations	Permutations
20	Merge Intervals	MergeIntervals
21	Majority Element II	MajorityElements
22	Jump Game	JumpGame
23	Insert Interval	InsertInterval
24	Longest Consecutive Sequence	LongestConsecutiveSequence
25	Reverse Words in a String	ReverseWords
26	House Robber II	HouseRobberII
27	Coin Change	CoinChange
28	Product of Array Except Self	ProductOfArrayExceptSelf
29	Jump Game II	JumpGameII
30	Subset	Subset
31	Subset II	SubsetII
32	Minimum Size Subarray Sum	MinimumSizeSubarraySum
33	Find Peak Element	FindPeakElement
34	Delete the Middle Node of a Linked List	DeleteMiddleNodeLinkedList
35	LRU Cache	LruCache
36	Remove Duplicates from Sorted Array II	RemoveDuplicatesSortedArrayII
37	Sum of Subarray Minimums	SumOfSubarrayMinimums
38	Binary Tree Level Order Traversal	BinaryTreeLevelOrderTraversal
39	Convert Sorted List to Binary Search Tree	SortedListToBinarySearchTree
39	Binary Tree Zigzag Level Order Traversal	BinaryTreeZigzagLevelOrderTraversal
40	Search in Rotated Sorted Array II	SearchInRotatedSortedArrayII
41	Top K Frequent Elements	TopKFrequentElements
42	Top K Frequent Words	TopKFrequentWords
43	Sort Characters By Frequency	SortCharactersByFrequency
44	Rotate List	RotateList
45	Binary Tree Level Order Traversal II	BinaryTreeLevelOrderTraversalII
46	N-ary Tree Level Order Traversal	NTreeLevelOrderTraversal
47	Where Will the Ball Fall	WhereWillTheBallFall
48	Number of Matching Subsequences	NumberOfMatchingSubsequence
49	Minimum Genetic Mutation	Minimum Genetic Mutation
50	Linked List Cycle II	LinkedListCycleII
51	Longest Palindrome by Concatenating Two Letter Words	LongestPalindromeConcatenatingTwoLetterWords
52	Word Search	WordSearch
53	Reverse Linked List II	ReverseLinkedListII
54	Online Stock Span	OnlineStockSpan
55	Best Time to Buy and Sell Stock II	BestTimeToBuyAndSellStockII
56	Best Time to Buy and Sell Stock with Transaction Fee	BestTimeToBuyAndSellStockWithTransactionFee
57	Remove All Adjacent Duplicates in String II	RemoveAllAdjacentDuplicatesInStringII
58	Validate Binary Search Tree	ValidateBinarySearchTree
59	Lowest Common Ancestor of a Binary Search Tree	LowestCommonAncestorBinarySearchTree
60	Count Complete Tree Nodes	CountCompleteTreeNodes
61	Rectangle Area	RectangleArea
62	Nearest Exit from Entrance in Maze	NearestExitFromEntranceInMaze
63	Perfect Squares	PerfectSquares
64	Find Players With Zero or One Losses	FindPlayersWithZeroOrOneLosses
65	Insert Delete GetRandom O(1)	RandomizedSet
66	Find All Anagrams in a String	FindAllAnagramsInAString
67	Minimum Average Difference	MinimumAverageDifference
68	Determine if Two Strings Are Close	DetermineIfTwoStringsAreClose
69	Delete and Earn	DeleteAndEarn
70	Odd Even Linked List	OddEvenLinkedList
71	Maximum Difference Between Node and Ancestor	MaximumDifferenceBetweenNodeAncestor
72	Maximum Product of Splitted Binary Tree	MaximumProductOfSplittedBinaryTree
73	Minimum Falling Path Sum	MinimumFallingPathSum
74	Longest Common Subsequence	LongestCommonSubsequence
75	Evaluate Reverse Polish Notatione	EvaluateReversePolishNotation$
76	Daily Temperatures	DailyTemperatures
77	Keys and Rooms	KeysAndRooms
78	Possible Bipartition	PossibleBipartition
79	Domino and Tromino Tiling	DominoAndTrominoTiling
80	Maximum Bags With Full Capacity of Rocks	MaximumBagsWithFullCapacityOfRocks
81	Maximum Ice Cream Bars	MaximumIceCreamBars

Hard Problems

Problem Name	Problem Name	Scala Solution
1	Longest Valid Parentheses	LongestValidParentheses
2	Median of Two Sorted Arrays	MedianOfTwoSortedArray
3	First Missing Positive	FirstMissingPositive
4	Sliding Window Maximum	SlidingWindowMaximum
5	Merge k Sorted Lists	MergeSortedLists
6	Orderly Queus	Orderly Queus
7	Find Median from Data Stream	FindMedianFromDataStream
8	Erect the Fence	ErectTheFence
9	Basic Calculator	BasicCalculator
10	Maximum Profit in Job Scheduling	MaximumProfitInJobScheduling
11	Binary Tree Maximum Path Sum	BinaryTreeMaximumPathSum

LeetCode-SQL

Problems

Easy Problems

Problem Name	Problem Name	SQL Solution
1	Big Countries	BigCountries
2	Recyclable and Low Fat Products	RecyclableLowFatProducts
3	Find Customer Referee	FindCustomerReferee
4	Customers Who Never Order	CustomersWhoNeverOrder
5	Calculate Special Bonus	CalculateSpecialBonus
6	Delete Duplicate Emails	DeleteDuplicateEmails
7	Swap Salary	SwapSalary
8	Fix Names in a Table	FixNamesTables

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