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leetcode problems solutions.

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algorithm cpp java leetcode oj problem-solving problems solutions

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Name		Name	Last commit message	Last commit date
1.Two Sum		1.Two Sum
10.Regular Expression Matching		10.Regular Expression Matching
100.Same Tree		100.Same Tree
101.Symmetric Tree		101.Symmetric Tree
1021.Remove Outermost Parentheses		1021.Remove Outermost Parentheses
104.Maximum Depth of Binary Tree		104.Maximum Depth of Binary Tree
107.Binary Tree Level Order Traversal II		107.Binary Tree Level Order Traversal II
108.Convert Sorted Array to Binary Search Tree		108.Convert Sorted Array to Binary Search Tree
11.Container With Most Water		11.Container With Most Water
110.Balanced Binary Tree		110.Balanced Binary Tree
111.Minimum Depth of Binary Tree		111.Minimum Depth of Binary Tree
112.Path Sum		112.Path Sum
118.Pascal-s Triangle		118.Pascal-s Triangle
119.Pascal-s Triangle II		119.Pascal-s Triangle II
12.Integer to Roman		12.Integer to Roman
121.Best Time to Buy and Sell Stock		121.Best Time to Buy and Sell Stock
122.Best Time to Buy and Sell Stock II		122.Best Time to Buy and Sell Stock II
125.Valid Palindrome		125.Valid Palindrome
13.Roman to Integer		13.Roman to Integer
135.Candy		135.Candy
136.Single Number		136.Single Number
14.Longest Common Prefix		14.Longest Common Prefix
141.Linked List Cycle		141.Linked List Cycle
15.3Sum		15.3Sum
153.Find Minimum in Rotated Sorted Array		153.Find Minimum in Rotated Sorted Array
155.Min Stack		155.Min Stack
16.3Sum Closest		16.3Sum Closest
160.Intersection of Two Linked Lists		160.Intersection of Two Linked Lists
167.Two Sum II - Input array is sorted		167.Two Sum II - Input array is sorted
168.Excel Sheet Column Title		168.Excel Sheet Column Title
169.Majority Element		169.Majority Element
17.Letter Combinations of a Phone Number		17.Letter Combinations of a Phone Number
171.Excel Sheet Column Number		171.Excel Sheet Column Number
172.Factorial Trailing Zeroes		172.Factorial Trailing Zeroes
173.Binary Search Tree Iterator		173.Binary Search Tree Iterator
181.Employees Earning More Than Their Managers		181.Employees Earning More Than Their Managers
182.Duplicate Emails		182.Duplicate Emails
183.Customers Who Never Order		183.Customers Who Never Order
189.Rotate Array		189.Rotate Array
19.Remove Nth Node From End of List		19.Remove Nth Node From End of List
190.Reverse Bits		190.Reverse Bits
191.Number of 1 Bits		191.Number of 1 Bits
193.Valid Phone Numbers		193.Valid Phone Numbers
195.Tenth Line		195.Tenth Line
196.Delete Duplicate Emails		196.Delete Duplicate Emails
197.Rising Temperature		197.Rising Temperature
198.House Robber		198.House Robber
2.Add two numbers		2.Add two numbers
20.Valid Parentheses		20.Valid Parentheses
202.Happy Number		202.Happy Number
203.Remove Linked List Elements		203.Remove Linked List Elements
204.Count Primes		204.Count Primes
205.Isomorphic Strings		205.Isomorphic Strings
206.Reverse Linked List		206.Reverse Linked List
21.Merge Two Sorted Lists		21.Merge Two Sorted Lists
217.Contains Duplicate		217.Contains Duplicate
219.Contains Duplicate II		219.Contains Duplicate II
22.Generate Parentheses		22.Generate Parentheses
221.maximal-square		221.maximal-square
225.Implement Stack using Queues		225.Implement Stack using Queues
226.Invert Binary Tree		226.Invert Binary Tree
228.Summary Ranges		228.Summary Ranges
231.Power of Two		231.Power of Two
232.Implement Queue using Stacks		232.Implement Queue using Stacks
234.Palindrome Linked List		234.Palindrome Linked List
235.Lowest Common Ancestor of a Binary Search Tree		235.Lowest Common Ancestor of a Binary Search Tree
237.Delete Node in a Linked List		237.Delete Node in a Linked List
24.Swap Nodes in Pairs		24.Swap Nodes in Pairs
242.Valid Anagram		242.Valid Anagram
257.Binary Tree Paths		257.Binary Tree Paths
258.Add Digits		258.Add Digits
26.Remove Duplicates from Sorted Array		26.Remove Duplicates from Sorted Array
263.Ugly Number		263.Ugly Number
268.Missing Number		268.Missing Number
27.Remove Element		27.Remove Element
278.First Bad Version		278.First Bad Version
279.Perfect Squares		279.Perfect Squares
28.Implement strStr()		28.Implement strStr()
283.Move Zeroes		283.Move Zeroes
290.Word Pattern		290.Word Pattern
292.Nim Game		292.Nim Game
299.Bulls and Cows		299.Bulls and Cows
3.Longest Substring Without Repeating Characters		3.Longest Substring Without Repeating Characters
303.Range Sum Query - Immutable		303.Range Sum Query - Immutable
31.Next Permutation		31.Next Permutation
326.Power of Three		326.Power of Three
33.Search in Rotated Sorted Array		33.Search in Rotated Sorted Array
342.Power of Four		342.Power of Four
344.Reverse String		344.Reverse String
345.Reverse Vowels of a String		345.Reverse Vowels of a String
349.Intersection of Two Arrays		349.Intersection of Two Arrays
35.Search Insert Position		35.Search Insert Position
350.Intersection of Two Arrays II		350.Intersection of Two Arrays II
367.Valid Perfect Square		367.Valid Perfect Square
371.Sum of Two Integers		371.Sum of Two Integers
374.Guess Number Higher or Lower		374.Guess Number Higher or Lower
38.Count and Say		38.Count and Say
383.Ransom Note		383.Ransom Note
389.Find the Difference		389.Find the Difference
392.Is Subsequence		392.Is Subsequence