Project - LeetCode

Order	Title	Solution	Difficulty
0001	Two Sum	Python3	Easy
0002	Add Two Numbers	Python3	Medium
0003	longest-substring-without-repeating-characters	Python3	Medium
0004	Median of Two Sorted Arrays	Python3	Hard
0005	Longest Palindromic Substring	Python3	Medium
0006	Zigzag Conversion	Python3	Medium
0007	Reverse Integer	Python3	Medium
0008	String to Integer (atoi)	Python3	Medium
0009	Palindrome Number	Python3	Easy
0011	Container With Most Water	Python3	Medium
0012	Integer to Roman	Python3	Medium
0013	Roman to Integer	Python3	Easy
0014	Longest Common Prefix	Python3	Easy
0015	3Sum	Python3	Medium
0017	Letter Combinations of a Phone Number	Python3	Medium
0019	Remove Nth Node From End of List	Python3	Medium
0020	Valid Parentheses	Python3	Easy
0021	Merge Two Sorted Lists	Python3	Easy
0023	Merge k Sorted Lists	Python3	Hard
0024	Swap Nodes in Pairs	Python3	Medium
0026	Remove Duplicates from Sorted Array	Python3	Easy
0027	Remove Element	Python3	Easy
0028	Find the Index of the First Occurrence in a String	Python3	Easy
0029	Divide Two Integers	Python3	Medium
0030	Substring with Concatenation of All Words	Python3	Hard
0031	Next Permutation	Python3	Medium
0034	Find First and Last Position of Element in Sorted Array	Python3	Medium
0035	0035_Search_Insert_Position	Python3	Easy
0036	Valid Sudoku	Python3	Medium
0038	Count and Say	Python3	Medium
0039	Combination Sum	Python3	Medium
0042	First Missing Positive	Python3	Hard
0042	Trapping Rain Water	Python3	Hard
0045	Jump Game II	Python3	Medium
0046	Permutations	Python3	Medium
0048	Rotate Image	Python3	Medium
0049	Group Anagrams	Python3	Medium
0050	Pow(x, n)	Python3	Medium
0054	Spiral Matrix	Python3	Medium
0055	Jump Game	Python3	Medium
0056	Merge Intervals	Python3	Medium
0057	Insert Interval	Python3	Medium
0058	Length of Last Word	Python3	Easy
0061	Rotate List	Python3	Medium
0062	Unique Paths	Python3	Medium
0063	Unique Paths II	Python3	Medium
0064	Minimum Path Sum	Python3	Medium
0065	Valid Number	Python3	Hard
0066	Plus One	Python3	Easy
0067	Add Binary	Python3	Easy
0068	Text Justification	Python3	Hard
0069	Sqrt(x)	Python3	Easy
0070	Climbing Stairs	Python3	Easy
0071	Simplify Path	Python3	Medium
0073	Set Matrix Zeroes	Python3	Medium
0074	Search a 2D Matrix	Python3	Medium
0077	Combinations	Python3	Medium
0079	Word Search	Python3	Medium
0080	Remove Duplicates from Sorted Array II	Python3	Medium
0082	Remove Duplicates from Sorted List II	Python3	Medium
0083	Remove Duplicates from Sorted List	Python3	Easy
0086	Partition List	Python3	Medium
0088	Merge Sorted Array	Python3	Easy
0092	Reverse Linked List II	Python3	Medium
0098	Validate Binary Search Tree	Python3	Medium
0100	Same Tree	Python3	Easy
0101	Symmetric Tree	Python3	Easy
0102	Binary Tree Level Order Traversal	Python3	Medium
0103	Binary Tree Zigzag Level Order Traversal	Python3	Medium
0105	Construct Binary Tree from Preorder and Inorder Traversal	Python3	Medium
0108	Convert Sorted Array to Binary Search Tree	Python3	Easy
0110	Balanced Binary Tree	Python3	Easy
0111	Minimum Depth of Binary Tree	Python3	Easy
0112	Path Sum	Python3	Easy
0114	Flatten Binary Tree to Linked List	Python3	Medium
0117	Populating Next Right Pointers in Each Node II	Python3	Medium
0118	Pascal's Triangle	Python3	Easy
0120	Triangle	Python3	Medium
0122	Best Time to Buy and Sell Stock II	Python3	Medium
0124	Binary Tree Maximum Path Sum	Python3	Hard
0125	Valid Palindrome	Python3	Easy
0128	Longest Consecutive Sequence	Python3	Medium
0129	Sum Root to Leaf Numbers	Python3	Medium
0130	Surrounded Regions	Python3	Medium
0133	Clone Graph	Python3	Medium
0134	Gas Station	Python3	Medium
0135	Candy	Python3	Hard
0136	Single Number	Python3	Easy
0136	Copy List with Random Pointer	Python3	Medium
0141	Linked List Cycle	Python3	Easy
0143	Reorder List	Python3	Medium
0144	Binary Tree Preorder Traversal	Python3	Easy
0146	LRU Cache	Python3	Medium
0148	Sort List	Python3	Medium
0150	Evaluate Reverse Polish Notation	Python3	Medium
0151	Reverse Words in a String	Python3	Medium
0155	Min Stack	Python3	Medium
0157	Read N Characters Given Read4	Python3	Easy
0162	Find Peak Element	Python3	Medium
0163	Missing Ranges	Python3	Easy
0166	Fraction to Recurring Decimal	Python3	Medium
0167	Two Sum II - Input Array Is Sorted	Python3	Medium
0172	Factorial Trailing Zeroes	Python3	Medium
0173	Binary Search Tree Iterator	Python3	Medium
0190	Reverse Bits	Python3	Easy
0191	Number of 1 Bits	Python3	Easy
0198	House Robber	Python3	Medium
0199	Binary Tree Right Side View	Python3	Medium
0202	Happy Number	Python3	Easy
0205	Isomorphic Strings	Python3	Easy
0206	Reverse Linked List	Python3	Easy
0208	Implement Trie (Prefix Tree)	Python3	Medium
0209	Minimum Size Subarray Sum	Python3	Medium
0215	Kth Largest Element in an Array	Python3	Medium
0217	Contains Duplicate	Python3	Easy
0219	Contains Duplicate II	Python3	Easy
0222	Count Complete Tree Nodes	Python3	Easy
0226	Invert Binary Tree	Python3	Easy
0227	Basic Calculator II	Python3	Medium
0228	Summary Ranges	Python3	Easy
0230	Kth Smallest Element in a BST	Python3	Medium
0232	Implement Queue using Stacks	Python3	Easy
0234	Palindrome Linked List	Python3	Easy
0236	Lowest Common Ancestor of a Binary Tree	Python3	Medium
0238	Product of Array Except Self	Python3	Medium
0242	Valid Anagram	Python3	Easy
0246	Strobogrammatic Number	Python3	Easy
0249	Group Shifted Strings	Python3	Medium
0253	Meeting Rooms II	Python3	Medium
0266	Palindrome Permutation	Python3	Easy
0268	Missing Number	Python3	Easy
0270	Closest Binary Search Tree Value	Python3	Easy
0274	H-Index	Python3	Medium
0277	Find the Celebrity	Python3	Medium
0279	Perfect Squares	Python3	Medium
0282	Expression Add Operators	Python3	Hard
0283	Move Zeroes	Python3	Easy
0287	Find the Duplicate Number	Python3	Medium
0290	Word Pattern	Python3	Medium
0300	Longest Increasing Subsequence	Python3	Medium
0303	Range Sum Query - Immutable	Python3	Easy
0304	Range Sum Query 2D - Immutable	Python3	Medium
0314	Binary Tree Vertical Order Traversal	Python3	Medium
0319	Bulb Switcher	Python3	Medium
0322	Coin Change	Python3	Medium
0325	Maximum Size Subarray Sum Equals k	Python3	Medium
0339	Nested List Weight Sum	Python3	Medium
0340	Longest Substring with At Most K Distinct Characters	Python3	Medium
0345	Reverse Vowels of a String	Python3	Easy
0346	Moving Average from Data Stream	Python3	Easy
0347	Top K Frequent Elements	Python3	Medium
0348	Design Tic-Tac-Toe	Python3	Medium
0349	Intersection of Two Arrays	Python3	Easy
0350	Intersection of Two Arrays II	Python3	Easy
0364	Nested List Weight Sum II	Python3	Medium
0378	Nested List Weight Sum II	Python3	Medium
0380	Insert Delete GetRandom O(1)	Python3	Medium
0387	First Unique Character in a String	Python3	Easy
0389	Find the Difference	Python3	Easy
0398	Random Pick Index	Python3	Medium
0399	Evaluate Division	Python3	Medium
0408	Valid Word Abbreviation	Python3	Easy
0414	Third Maximum Number	Python3	Easy
0417	Pacific Atlantic Water Flow	Python3	Medium
0426	Convert Binary Search Tree to Sorted Doubly Linked List	Python3	Medium
0433	Minimum Genetic Mutation	Python3	Medium
0442	Find All Duplicates in an Array	Python3	Medium
0443	String Compression	Python3	Medium
0451	String Compression	Python3	Medium
0451	Minimum Number of Arrows to Burst Balloons	Python3	Medium
0455	Arithmetic Slices II - Subsequence	Python3	Hard
0455	Assign Cookies	Python3	Easy
0459	Repeated Substring Pattern	Python3	Easy
0463	Island Perimeter	Python3	Easy
0494	Target Sum	Python3	Medium
0498	Diagonal Traverse	Python3	Medium
0501	Repeated Substring Pattern	Python3	Easy
0513	Find Bottom Left Tree Value	Python3	Medium
0515	Find Largest Value in Each Tree Row	Python3	Medium
0523	Continuous Subarray Sum	Python3	Medium
0525	Contiguous Array	Python3	Medium
0528	Random Pick with Weight	Python3	Medium
0530	Minimum Absolute Difference in BST	Python3	Easy
0543	Diameter of Binary Tree	Python3	Easy
0551	Student Attendance Record I	Python3	Easy
0560	Subarray Sum Equals K	Python3	Medium
0567	Permutation in String	Python3	Medium
0572	Subtree of Another Tree	Python3	Easy
0605	Can Place Flowers	Python3	Easy
0621	Task Scheduler	Python3	Medium
0632	Smallest Range Covering Elements from K Lists	Python3	Hard
0645	Set Mismatch	Python3	Easy
0653	Two Sum IV - Input is a BST	Python3	Easy
0658	Find K Closest Elements	Python3	Medium
0670	Maximum Swap	Python3	Medium
0674	Longest Continuous Increasing Subsequence	Python3	Easy
0678	Valid Parenthesis String	Python3	Medium
0680	Valid Palindrome II	Python3	Easy
0689	Maximum Sum of 3 Non-Overlapping Subarrays	Python3	Hard
0703	Kth Largest Element in a Stream	Python3	Easy
0708	Insert into a Sorted Circular Linked List	Python3	Medium
0713	Subarray Product Less Than K	Python3	Medium
0721	Accounts Merge	Python3	Medium
0739	Network Delay Time	Python3	Medium
0743	Network Delay Time	Python3	Medium
0766	Toeplitz Matrix	Python3	Easy
0769	Max Chunks To Make Sorted	Python3	Medium
0773	Sliding Puzzle	Python3	Hard
0785	Is Graph Bipartite?	Python3	Medium
0791	Custom Sort String	Python3	Medium
0796	Rotate String	Python3	Easy
0824	Goat Latin	Python3	Easy
0827	Making A Large Island	Python3	Hard
0859	Buddy Strings	Python3	Easy
0863	Shortest Subarray with Sum at Least K	Python3	Hard
0863	All Nodes Distance K in Binary Tree	Python3	Medium
0865	Smallest Subtree with all the Deepest Nodes	Python3	Medium
0872	Leaf-Similar Trees	Python3	Easy
0876	Middle of the Linked List	Python3	Easy
0916	Word Subsets	Python3	Medium
0921	Minimum Add to Make Parentheses Valid	Python3	Medium
0930	Binary Subarrays With Sum	Python3	Medium
0931	Minimum Falling Path Sum	Python3	Medium
0938	Range Sum of BST	Python3	Easy
0948	Bag of Tokens	Python3	Medium
0950	Reveal Cards In Increasing Order	Python3	Medium
0951	Flip Equivalent Binary Trees	Python3	Medium
0953	Verifying an Alien Dictionary	Python3	Easy
0957	Prison Cells After N Days	Python3	Medium
0957	Check Completeness of a Binary Tree	Python3	Medium
0973	K Closest Points to Origin	Python3	Medium
0977	Squares of a Sorted Array	Python3	Easy
0983	Minimum Cost For Tickets	Python3	Medium
0986	Interval List Intersections	Python3	Medium
0987	Vertical Order Traversal of a Binary Tree	Python3	Hard
0992	Subarrays with K Different Integers	Python3	Hard
1004	Max Consecutive Ones III	Python3	Medium
1014	Best Sightseeing Pair	Python3	Medium
1026	Maximum Difference Between Node and Ancestor	Python3	Medium
1027	Longest Arithmetic Subsequence	Python3	Medium
1047	Remove All Adjacent Duplicates In String	Python3	Easy
1047	Remove Vowels from a String	Python3	Easy
1072	Flip Columns For Maximum Number of Equal Rows	Python3	Medium
1091	Shortest Path in Binary Matrix	Python3	Medium
1106	Parsing A Boolean Expression	Python3	Hard
1137	N-th Tribonacci Number	Python3	Medium
1171	Remove Zero Sum Consecutive Nodes from Linked List	Python3	Medium
1176	Diet Plan Performance	Python3	Easy
1207	Unique Number of Occurrences	Python3	Easy
1213	Intersection of Three Sorted Arrays	Python3	Easy
1216	Valid Palindrome III	Python3	Hard
1235	Maximum Profit in Job Scheduling	Python3	Hard
1249	Minimum Remove to Make Valid Parentheses	Python3	Medium
1266	Minimum Time Visiting All Points	Python3	Easy
1291	Sequential Digits	Python3	Medium
1329	Sort the Matrix Diagonally	Python3	Medium
1331	Rank Transform of an Array	Python3	Easy
1346	Check If N and Its Double Exist	Python3	Easy
1400	Construct K Palindrome Strings	Python3	Medium
1408	String Matching in an Array	Python3	Easy
1422	Maximum Score After Splitting a String	Python3	Easy
1427	Perform String Shifts	Python3	Easy
1436	Destination City	Python3	Easy
1443	Minimum Time to Collect All Apples in a Tree	Python3	Medium
1455	Check If a Word Occurs As a Prefix of Any Word in a Sentence	Python3	Easy
1469	Find All The Lonely Nodes	Python3	Easy
1492	The kth Factor of n	Python3	Medium
1528	Shuffle String	Python3	Easy
1539	Kth Missing Positive Number	Python3	Easy
1544	Make The String Great	Python3	Easy
1545	Find Kth Bit in Nth Binary String	Python3	Medium
1570	Dot Product of Two Sparse Vectors	Python3	Medium
1574	Shortest Subarray to be Removed to Make Array Sorted	Python3	Medium
1578	Minimum Time to Make Rope Colorful	Python3	Medium
1609	Even Odd Tree	Python3	Medium
1614	Maximum Nesting Depth of the Parentheses	Python3	Easy
1639	Number of Ways to Form a Target String Given a Dictionary	Python3	Hard
1644	Lowest Common Ancestor of a Binary Tree II	Python3	Medium
1650	Lowest Common Ancestor of a Binary Tree III	Python3	Medium
1652	Defuse the Bomb	Python3	Easy
1662	Check If Two String Arrays are Equivalent	Python3	Easy
1669	Merge In Between Linked Lists	Python3	Medium
1700	Number of Students Unable to Eat Lunch	Python3	Easy
1704	Determine if String Halves Are Alike	Python3	Easy
1750	Minimum Length of String After Deleting Similar Ends	Python3	Medium
1760	Minimum Limit of Balls in a Bag	Python3	Medium
1762	Buildings With an Ocean View	Python3	Medium
1768	Merge Strings Alternately	Python3	Easy
1769	Minimum Number of Operations to Move All Balls to Each Box	Python3	Medium
1791	Find Center of Star Graph	Python3	Easy
1792	Maximum Average Pass Ratio	Python3	Meidum
1829	Maximum XOR for Each Query	Python3	Meidum
1861	Rotating the Box	Python3	Meidum
1891	Cutting Ribbons	Python3	Meidum
1897	Redistribute Characters to Make All Strings Equal	Python3	Easy
1930	Unique Length-3 Palindromic Subsequences	Python3	Meidum
1942	The Number of the Smallest Unoccupied Chair	Python3	Meidum
1957	Delete Characters to Make Fancy String	Python3	Easy
1963	Minimum Number of Swaps to Make the String Balanced	Python3	Meidum
1975	Maximum Matrix Sum	Python3	Meidum
2054	Two Best Non-Overlapping Events	Python3	Meidum
2064	Minimized Maximum of Products Distributed to Any Store	Python3	Meidum
2070	Most Beautiful Item for Each Query	Python3	Meidum
2073	Time Needed to Buy Tickets	Python3	Easy
2097	Valid Arrangement of Pairs	Python3	Hard
2108	Find First Palindromic String in the Array	Python3	Medium
2109	Adding Spaces to a String	Python3	Medium
2116	Check if a Parentheses String Can Be Valid	Python3	Medium
2125	Number of Laser Beams in a Bank	Python3	Medium
2149	Rearrange Array Elements by Sign	Python3	Medium
2168	Unique Substrings With Equal Digit Frequency	Python3	Medium
2182	Construct String With Repeat Limit	Python3	Medium
2185	Counting Words With a Given Prefix	Python3	Easy
2225	Find Players With Zero or One Losses	Python3	Medium
2257	Count Unguarded Cells in the Grid	Python3	Medium
2270	Number of Ways to Split Array	Python3	Medium
2275	Largest Combination With Bitwise AND Greater Than Zero	Python3	Medium
2290	Minimum Obstacle Removal to Reach Corner	Python3	Hard
2330	Valid Palindrome IV	Python3	Hard
2337	Move Pieces to Obtain a String	Python3	Medium
2381	Shifting Letters II	Python3	Medium
2385	Amount of Time for Binary Tree to Be Infected	Python3	Medium
2415	Reverse Odd Levels of Binary Tree	Python3	Medium
2418	Sort the People	Python3	Easy
2429	Minimize XOR	Python3	Medium
2444	Count Subarrays With Fixed Bounds	Python3	Hard
2461	Maximum Sum of Distinct Subarrays With Length K	Python3	Medium
2466	Count Ways To Build Good Strings	Python3	Medium
2485	Find the Pivot Integer	Python3	Easy
2490	Circular Sentence	Python3	Easy
2516	Take K of Each Character From Left and Right	Python3	Medium
2530	Maximal Score After Applying K Operations	Python3	Medium
2540	Minimum Common Value	Python3	Easy
2554	Maximum Number of Integers to Choose From a Range I	Python3	Medium
2558	Take Gifts From the Richest Pile	Python3	Easy
2559	Count Vowel Strings in Ranges	Python3	Medium
2563	Count the Number of Fair Pairs	Python3	Medium
2577	Minimum Time to Visit a Cell In a Grid	Python3	Hard
2583	Kth Largest Sum in a Binary Tree	Python3	Medium
2593	Find Score of an Array After Marking All Elements	Python3	Medium
2601	Prime Subtraction Operation	Python3	Medium
2610	Convert an Array Into a 2D Array With Conditions	Python3	Medium
2641	Cousins in Binary Tree II	Python3	Medium
2657	Find the Prefix Common Array of Two Arrays	Python3	Medium
2696	Minimum String Length After Removing Substrings	Python3	Easy
2762	Continuous Subarrays	Python3	Medium
2769	Find the Maximum Achievable Number	Python3	Easy
2779	Maximum Beauty of an Array After Applying Operation	Python3	Medium
2810	Faulty Keyboard	Python3	Easy
2825	Make String a Subsequence Using Cyclic Increments	Python3	Easy
2864	Maximum Odd Binary Number	Python3	Easy
2870	Minimum Number of Operations to Make Array Empty	Python3	Medium
2914	Minimum Number of Changes to Make Binary String Beautiful	Python3	Medium
2924	Find Champion II	Python3	Medium
2938	Separate Black and White Balls	Python3	Medium
2951	Find the Peaks	Python3	Easy
2956	Find Common Elements Between Two Arrays	Python3	Easy
2958	Length of Longest Subarray With at Most K Frequency	Python3	Medium
2962	Count Subarrays Where Max Element Appears at Least K Times	Python3	Medium
2965	Find Missing and Repeated Values	Python3	Easy
2971	Find Polygon With the Largest Perimeter	Python3	Medium
2981	Find Longest Special Substring That Occurs Thrice I	Python3	Medium
3005	Count Elements With Maximum Frequency	Python3	Easy
3011	Find if Array Can Be Sorted	Python3	Medium
3042	Count Prefix and Suffix Pairs I	Python3	Easy
3062	Winner of the Linked List Game	Python3	Easy
3063	Linked List Frequency	Python3	Easy
3097	Shortest Subarray With OR at Least K II	Python3	Medium
3133	Minimum Array End	Python3	Medium
3152	Special Array II	Python3	Medium
3163	String Compression III	Python3	Medium
3203	Find Minimum Diameter After Merging Two Trees	Python3	Medium
3223	Minimum Length of String After Operations	Python3	Medium
3243	Shortest Distance After Road Addition Queries I	Python3	Medium
3254	Find the Power of K-Size Subarrays I	Python3	Medium
3264	Final Array State After K Multiplication Operations I	Python3	Medium