LeetCode

LeetCode

Solutions to some of the questions on the LeetCode website.

The questions are divided into 3 levels of difficulty:

• Easy
• Medium
• Hard

Solutions

Problem Solution	Problem Statement	Difficulty
LC0001.cpp	Two Sum	Easy
LC0002.cpp	Add Two Numbers	Medium
LC0003.cpp	Longest Substring Without Repeating Characters	Medium
LC0007.cpp	Reverse Integer	Easy
LC0009.cpp	Palindrome Number	Easy
LC0011.cpp	Container With Most Water	Medium
LC0013.cpp	Roman to Integer	Easy
LC0014.cpp	Longest Common Prefix	Easy
LC0015.cpp	3Sum	Medium
LC0016.cpp	3Sum Closest	Medium
LC0017.cpp	Letter Combinations of a Phone Number	Medium
LC0018.cpp	4Sum	Medium
LC0019.cpp	Remove Nth Node From End of List	Medium
LC0020.cpp	Valid Parentheses	Easy
LC0021.cpp	Merge Two Sorted Lists	Easy
LC0022.cpp	Generate Parentheses	Medium
LC0023.cpp	Merge k Sorted Lists	Hard
LC0026.cpp	Remove Duplicates from Sorted Array	Easy
LC0027.cpp	Remove Element	Easy
LC0028.cpp	Implement strStr()	Easy
LC0031.cpp	Next Permutation	Medium
LC0032.cpp	Longest Valid Parentheses	Hard
LC0033.cpp	Search in Rotated Sorted Array	Medium
LC0034.cpp	Find First and Last Position of Element in Sorted Array	Medium
LC0035.cpp	Search Insert Position	Easy
LC0036.cpp	Valid Sudoku	Medium
LC0037.cpp	Sudoku Solver	Hard
LC0038.cpp	Count and Say	Easy
LC0039.cpp	Combination Sum	Medium
LC0040.cpp	Combination Sum II	Medium
LC0041.cpp	First Missing Positive	Hard
LC0045.cpp	Jump Game II	Medium
LC0046.cpp	Permutations	Medium
LC0047.cpp	Permutations II	Medium
LC0048.cpp	Rotate Image	Medium
LC0049.cpp	Group Anagrams	Medium
LC0050.cpp	Pow(x, n)	Medium
LC0051.cpp	N-Queens	Hard
LC0052.cpp	N-Queens II	Hard
LC0053.cpp	Maximum Subarray	Easy
LC0054.cpp	Spiral Matrix	Medium
LC0055.cpp	Jump Game	Medium
LC0056.cpp	Merge Intervals	Medium
LC0057.cpp	Insert Interval	Medium
LC0058.cpp	Length of Last Word	Easy
LC0059.cpp	Spiral Matrix II	Medium
LC0060.cpp	Permutation Sequence	Medium
LC0062.cpp	Unique Paths	Medium
LC0063.cpp	Unique Paths II	Medium
LC0064.cpp	Minimum Path Sum	Medium
LC0065.cpp	Valid Number	Hard
LC0066.cpp	Plus One	Easy
LC0067.cpp	Add Binary	Easy
LC0069.cpp	Sqrt(x)	Easy
LC0070.cpp	Climbing Stairs	Easy
LC0071.cpp	Set Matrix Zeroes	Medium
LC0072.cpp	Edit Distance	Hard
LC0073.cpp	Set Matrix Zeroes	Medium
LC0074.cpp	Search a 2D Matrix	Medium
LC0075.cpp	Sort Colors	Medium
LC0076.cpp	Minimum Window Substring	Hard
LC0078.cpp	Subsets	Medium
LC0079.cpp	Word Search	Medium
LC0080.cpp	Remove Duplicates from Sorted Array II	Medium
LC0081.cpp	Search in Rotated Sorted Array II	Medium
LC0082.cpp	Remove Duplicates from Sorted List II	Medium
LC0083.cpp	Remove Duplicates from Sorted List	Easy
LC0086.cpp	Partition List	Medium
LC0088.cpp	Merge Sorted Array	Easy
LC0089.cpp	Gray Code	Medium
LC0090.cpp	Subsets II	Medium
LC0091.cpp	Decode Ways	Medium
LC0092.cpp	Reverse Linked List II	Medium
LC0094.cpp	Binary Tree Inorder Traversal	Medium
LC0095.cpp	Unique Binary Search Trees II	Medium
LC0096.cpp	Unique Binary Search Trees	Medium
LC0098.cpp	Validate Binary Search Tree	Medium
LC0100.cpp	Same Tree	Easy
LC0101.cpp	Symmetric Tree	Easy
LC0102.cpp	Binary Tree Level Order Traversal	Medium
LC0103.cpp	Binary Tree Zigzag Level Order Traversal	Medium
LC0104.cpp	Maximum Depth of Binary Tree	Easy
LC0105.cpp	Construct Binary Tree from Preorder and Inorder Traversal	Medium
LC0106.cpp	Construct Binary Tree from Inorder and Postorder Traversal	Medium
LC0107.cpp	Binary Tree Level Order Traversal II	Easy
LC0108.cpp	Convert Sorted Array to Binary Search Tree	Easy
LC0109.cpp	Convert Sorted List to Binary Search Tree	Medium
LC0110.cpp	Balanced Binary Tree	Easy
LC0111.cpp	Minimum Depth of Binary Tree	Easy
LC0112.cpp	Path Sum	Easy
LC0113.cpp	Path Sum II	Medium
LC0114.cpp	Flatten Binary Tree to Linked List	Medium
LC0116.cpp	Populating Next Right Pointers in Each Node	Medium
LC0118.cpp	Pascal's Triangle	Easy
LC0119.cpp	Pascal's Triangle II	Easy
LC0120.cpp	Triangle	Medium
LC0121.cpp	Best Time to Buy and Sell Stock	Easy
LC0122.cpp	Best Time to Buy and Sell Stock II	Easy
LC0123.cpp	Best Time to Buy and Sell Stock III	Hard
LC0124.cpp	Binary Tree Maximum Path Sum	Hard
LC0125.cpp	Valid Palindrome	Easy
LC0126.cpp	Word Ladder II	Hard
LC0127.cpp	Word Ladder	Medium
LC0128.cpp	Longest Consecutive Sequence	Medium
LC0129.cpp	Sum Root to Leaf Numbers	Medium
LC0130.cpp	Surrounded Regions	Medium
LC0131.cpp	Palindrome Partitioning	Medium
LC0134.cpp	Gas Station	Medium
LC0136.cpp	Single Number	Easy
LC0137.cpp	Single Number II	Medium
LC0138.cpp	Copy List with Random Pointer	Medium
LC0139.cpp	Word Break	Medium
LC0140.cpp	Word Break II	Hard
LC0141.cpp	Linked List Cycle	Easy
LC0142.cpp	Linked List Cycle II	Medium
LC0143.cpp	Reorder List	Medium
LC0144.cpp	Binary Tree Preorder Traversal	Medium
LC0145.cpp	Binary Tree Postorder Traversal	Hard
LC0145.cpp	Binary Tree Postorder Traversal	Medium
LC0146.cpp	LRU Cache	Medium
LC0147.cpp	Insertion Sort List	Medium
LC0150.cpp	Evaluate Reverse Polish Notation	Medium
LC0151.cpp	Reverse Words in a String	Medium
LC0152.cpp	Maximum Product Subarray	Medium
LC0153.cpp	Find Minimum in Rotated Sorted Array	Medium
LC0154.cpp	Find Minimum in Rotated Sorted Array II	Hard
LC0155.cpp	Min Stack	Easy
LC0160.cpp	Intersection of Two Linked Lists	Easy
LC0162.cpp	Find Peak Element	Medium
LC0164.cpp	Maximum Gap	Hard
LC0165.cpp	Compare Version Numbers	Medium
LC0167.cpp	Two Sum II - Input array is sorted	Easy
LC0168.cpp	Excel Sheet Column Title	Easy
LC0169.cpp	Majority Element	Easy
LC0171.cpp	Excel Sheet Column Number	Easy
LC0174.cpp	Dungeon Game	Hard
LC0179.cpp	Largest Number	Medium
LC0188.cpp	Best Time to Buy and Sell Stock IV	Hard
LC0189.cpp	Rotate Array	Easy
LC0190.cpp	Reverse Bits	Easy
LC0191.cpp	Number of 1 Bits	Easy
LC0198.cpp	House Robber	Easy
LC0199.cpp	Binary Tree Right Side View	Medium
LC0200.cpp	Number of Islands	Medium
LC0201.cpp	Bitwise AND of Numbers Range	Medium
LC0202.cpp	Happy Number	Easy
LC0203.cpp	Remove Linked List Elements	Easy
LC0204.cpp	Count Primes	Easy
LC0205.cpp	Isomorphic Strings	Easy
LC0206.cpp	Reverse Linked List	Easy
LC0207.cpp	Course Schedule	Medium
LC0208.cpp	Implement Trie (Prefix Tree)	Medium
LC0210.cpp	Course Schedule II	Medium
LC0211.cpp	Add and Search Word - Data structure design	Medium
LC0212.cpp	Word Search II	Hard
LC0213.cpp	House Robber II	Medium
LC0215.cpp	Kth Largest Element in an Array	Medium
LC0216.cpp	Combination Sum III	Medium
LC0217.cpp	Contains Duplicate	Easy
LC0219.cpp	Contains Duplicate II	Easy
LC0220.cpp	Contains Duplicate III	Medium
LC0221.cpp	Maximal Square	Medium
LC0222.cpp	Count Complete Tree Nodes	Medium
LC0226.cpp	Invert Binary Tree	Easy
LC0228.cpp	Summary Ranges	Easy
LC0229.cpp	Majority Element II	Medium
LC0230.cpp	Kth Smallest Element in a BST	Medium
LC0231.cpp	Power of Two	Easy
LC0234.cpp	Palindrome Linked List	Easy
LC0235.cpp	Lowest Common Ancestor of a Binary Search Tree	Easy
LC0236.cpp	Lowest Common Ancestor of a Binary Tree	Medium
LC0237.cpp	Delete Node in a Linked List	Easy
LC0238.cpp	Product of Array Except Self	Medium
LC0239.cpp	Sliding Window Maximum	Hard
LC0240.cpp	Search a 2D Matrix II	Medium
LC0242.cpp	Valid Anagram	Easy
LC0257.cpp	Binary Tree Paths	Easy
LC0258.cpp	Add Digits	Easy
LC0260.cpp	Single Number III	Medium
LC0263.cpp	Ugly Number	Easy
LC0264.cpp	Ugly Number II	Medium
LC0268.cpp	Missing Number	Easy
LC0274.cpp	H-Index	Medium
LC0275.cpp	H-Index II	Medium
LC0278.cpp	First Bad Version	Easy
LC0279.cpp	Perfect Squares	Medium
LC0283.cpp	Move Zeroes	Easy
LC0284.cpp	Peeking Iterator	Medium
LC0287.cpp	Find the Duplicate Number	Medium
LC0289.cpp	Game of Life	Medium
LC0290.cpp	Word Pattern	Easy
LC0292.cpp	Nim Game	Easy
LC0295.cpp	Find Median from Data Stream	Hard
LC0297.cpp	Serialize and Deserialize Binary Tree	Hard
LC0299.cpp	Bulls and Cows	Easy
LC0300.cpp	Longest Increasing Subsequence	Medium
LC0303.cpp	Range Sum Query - Immutable	Easy
LC0304.cpp	Range Sum Query 2D - Immutable	Medium
LC0307.cpp	Range Sum Query - Mutable	Medium
LC0309.cpp	Best Time to Buy and Sell Stock with Cooldown	Medium
LC0318.cpp	Maximum Product of Word Lengths	Medium
LC0322.cpp	Coin Change	Medium
LC0326.cpp	Power of Three	Easy
LC0328.cpp	Odd Even Linked List	Medium
LC0329.cpp	Longest Increasing Path in a Matrix	Hard
LC0332.cpp	Reconstruct Itinerary	Medium
LC0337.cpp	House Robber III	Medium
LC0338.cpp	Counting Bits	Medium
LC0342.cpp	Power of Four	Easy
LC0344.cpp	Reverse String	Easy
LC0345.cpp	Reverse Vowels of a String	Easy
LC0347.cpp	Top K Frequent Elements	Medium
LC0350.cpp	Intersection of Two Arrays II	Easy
LC0367.cpp	Valid Perfect Square	Easy
LC0368.cpp	Largest Divisible Subset	Medium
LC0371.cpp	Sum of Two Integers	Medium
LC0374.cpp	Guess Number Higher or Lower	Easy
LC0377.cpp	Combination Sum IV	Medium
LC0378.cpp	Kth Smallest Element in a Sorted Matrix	Medium
LC0380.cpp	Insert Delete GetRandom O(1)	Medium
LC0381.cpp	Insert Delete GetRandom O(1) - Duplicates allowed	Hard
LC0383.cpp	Ransom Note	Easy
LC0384.cpp	Shuffle an Array	Medium
LC0387.cpp	First Unique Character in a String	Easy
LC0389.cpp	Find the Difference	Easy
LC0392.cpp	Is Subsequence	Easy
LC0395.cpp	Longest Substring with At Least K Repeating Characters	Medium
LC0396.cpp	Rotate Function	Medium
LC0399.cpp	Evaluate Division	Medium
LC0402.cpp	Remove K Digits	Medium
LC0404.cpp	Sum of Left Leaves	Easy
LC0406.cpp	Queue Reconstruction by Height	Medium
LC0409.cpp	Longest Palindrome	Easy
LC0412.cpp	Fizz Buzz	Easy
LC0413.cpp	Arithmetic Slices	Medium
LC0414.cpp	Third Maximum Number	Easy
LC0415.cpp	Add Strings	Easy
LC0416.cpp	Partition Equal Subset Sum	Medium
LC0421.cpp	Maximum XOR of Two Numbers in an Array	Medium
LC0423.cpp	Reconstruct Original Digits from English	Medium
LC0429.cpp	N-ary Tree Level Order Traversal	Medium
LC0430.cpp	Flatten a Multilevel Doubly Linked List	Medium
LC0434.cpp	Number of Segments in a String	Easy
LC0435.cpp	Non-overlapping Intervals	Medium
LC0436.cpp	Find Right Interval	Medium
LC0437.cpp	Path Sum III	Medium
LC0438.cpp	Find All Anagrams in a String	Medium
LC0441.cpp	Arranging Coins	Easy
LC0442.cpp	Find All Duplicates in an Array	Medium
LC0442.cpp	Find All Duplicates in an Array	Medium
LC0448.cpp	Find All Numbers Disappeared in an Array	Easy
LC0450.cpp	Delete Node in a BST	Medium
LC0451.cpp	Sort Characters By Frequency	Medium
LC0453.cpp	Minimum Moves to Equal Array Elements	Easy
LC0454.cpp	4Sum II	Medium
LC0455.cpp	Assign Cookies	Easy
LC0459.cpp	Repeated Substring Pattern	Easy
LC0460.cpp	LFU Cache	Hard
LC0461.cpp	Hamming Distance	Easy
LC0462.cpp	Minimum Moves to Equal Array Elements II	Medium
LC0463.cpp	Island Perimeter	Easy
LC0468.cpp	Validate IP Address	Medium
LC0470.cpp	Implement Rand10() Using Rand7()	Medium
LC0473.cpp	Matchsticks to Square	Medium
LC0474.cpp	Ones and Zeroes	Medium
LC0476.cpp	Number Complement	Easy
LC0482.cpp	License Key Formatting	Easy
LC0485.cpp	Max Consecutive Ones	Easy
LC0492.cpp	Construct the Rectangle	Easy
LC0494.cpp	Target Sum	Medium
LC0495.cpp	Teemo Attacking	Medium
LC0496.cpp	Next Greater Element I	Easy
LC0497.cpp	Random Point in Non-overlapping Rectangles	Medium
LC0500.cpp	Keyboard Row	Easy
LC0503.cpp	Next Greater Element II	Medium
LC0509.cpp	Fibonacci Number	Easy
LC0515.cpp	Find Largest Value in Each Tree Row	Medium
LC0518.cpp	Coin Change 2	Medium
LC0520.cpp	Detect Capital	Easy
LC0524.cpp	Longest Word in Dictionary through Deleting	Medium
LC0525.cpp	Contiguous Array	Medium
LC0526.cpp	Beautiful Arrangement	Medium
LC0528.cpp	Random Pick with Weight	Medium
LC0532.cpp	K-diff Pairs in an Array	Medium
LC0538.cpp	Convert BST to Greater Tree	Medium
LC0540.cpp	Single Element in a Sorted Array	Medium
LC0541.cpp	Reverse String II	Easy
LC0542.cpp	01 Matrix	Medium
LC0543.cpp	Diameter of Binary Tree	Easy
LC0554.cpp	Brick Wall	Medium
LC0556.cpp	Next Greater Element III	Medium
LC0557.cpp	Reverse Words in a String III	Easy
LC0559.cpp	Maximum Depth of N-ary Tree	Easy
LC0560.cpp	Subarray Sum Equals K	Medium
LC0561.cpp	Array Partition I	Easy
LC0563.cpp	Binary Tree Tilt	Easy
LC0566.cpp	Reshape the Matrix	Easy
LC0567.cpp	Permutation in String	Medium
LC0572.cpp	Subtree of Another Tree	Easy
LC0575.cpp	Distribute Candies	Easy
LC0583.cpp	Delete Operation for Two Strings	Medium
LC0589.cpp	N-ary Tree Preorder Traversal	Medium
LC0590.cpp	Binary Tree Postorder Traversal	Easy
LC0594.cpp	Longest Harmonious Subsequence	Easy
LC0605.cpp	Can Place Flowers	Easy
LC0606.cpp	Construct String from Binary Tree	Easy
LC0609.cpp	Find Duplicate File in System	Medium
LC0611.cpp	Valid Triangle Number	Medium
LC0617.cpp	Merge Two Binary Trees	Easy
LC0621.cpp	Task Scheduler	Medium
LC0622.cpp	Design Circular Queue	Medium
LC0630.cpp	Course Schedule III	Hard
LC0637.cpp	Average of Levels in Binary Tree	Easy
LC0641.cpp	Design Circular Deque	Medium
LC0643.cpp	Maximum Average Subarray I	Easy
LC0645.cpp	Set Mismatch	Easy
LC0647.cpp	Palindromic Substrings	Medium
LC0657.cpp	DI String Match	Easy
LC0658.cpp	Find K Closest Elements	Medium
LC0661.cpp	Image Smoother	Easy
LC0662.cpp	Maximum Width of Binary Tree	Medium
LC0665.cpp	Non-decreasing Array	Easy
LC0667.cpp	Beautiful Arrangement II	Medium
LC0669.cpp	Trim a Binary Search Tree	Easy
LC0678.cpp	Valid Parenthesis String	Medium
LC0680.cpp	Valid Palindrome II	Easy
LC0682.cpp	Baseball Game	Easy
LC0692.cpp	Top K Frequent Words	Medium
LC0693.cpp	Trim a Binary Search Tree	Easy
LC0695.cpp	Max Area of Island	Medium
LC0696.cpp	Count Binary Substrings	Easy
LC0698.cpp	Partition to K Equal Sum Subsets	Medium
LC0700.cpp	Search in a Binary Search Tree	Easy
LC0701.cpp	Insert into a Binary Search Tree	Medium
LC0704.cpp	Binary Search	Easy
LC0705.cpp	Design HashSet	Easy
LC0706.cpp	Design HashMap	Easy
LC0709.cpp	To Lower Case	Easy
LC0712.cpp	Delete Operation for Two Strings	Medium
LC0713.cpp	Subarray Product Less Than K	Medium
LC0714.cpp	Best Time to Buy and Sell Stock with Transaction Fee	Medium
LC0718.cpp	Maximum Length of Repeated Subarray	Medium
LC0720.cpp	Longest Word in Dictionary	Medium
LC0728.cpp	Self Dividing Numbers	Easy
LC0729.cpp	My Calendar I	Medium
LC0733.cpp	Flood Fill	Easy
LC0739.cpp	Daily Temperatures	Medium
LC0745.cpp	Prefix and Suffix Search	Hard
LC0746.cpp	Min Cost Climbing Stairs	Easy
LC0748.cpp	Shortest Completing Word	Easy
LC0752.cpp	Open the Lock	Medium
LC0763.cpp	Partition Labels	Medium
LC0766.cpp	Toeplitz Matrix	Easy
LC0771.cpp	Jewels and Stones	Easy
LC0775.cpp	Global and Local Inversions	Medium
LC0778.cpp	Swim in Rising Water	Hard
LC0784.cpp	Letter Case Permutation	Medium
LC0785.cpp	Is Graph Bipartite?	Medium
LC0787.cpp	Cheapest Flights Within K Stops	Medium
LC0788.cpp	Rotated Digits	Easy
LC0791.cpp	Custom Sort String	Medium
LC0795.cpp	Number of Subarrays with Bounded Maximum	Medium
LC0796.cpp	Rotate String	Easy
LC0797.cpp	All Paths From Source to Target	Medium
LC0804.cpp	Unique Morse Code Words	Easy
LC0812.cpp	Largest Triangle Area	Easy
LC0814.cpp	Binary Tree Pruning	Medium
LC0816.cpp	Ambiguous Coordinates	Medium
LC0821.cpp	Shortest Distance to a Character	Easy
LC0824.cpp	Goat Latin	Easy
LC0832.cpp	Flipping an Image	Easy
LC0833.cpp	Find And Replace in String	Medium
LC0835.cpp	Image Overlap	Medium
LC0844.cpp	Backspace String Compare	Easy
LC0852.cpp	Peak Index in a Mountain Array	Easy
LC0856.cpp	Score of Parentheses	Medium
LC0859.cpp	Buddy Strings	Easy
LC0860.cpp	Lemonade Change	Easy
LC0867.cpp	Transpose Matrix	Easy
LC0868.cpp	Binary Gap	Easy
LC0872.cpp	Leaf-Similar Trees	Easy
LC0873.cpp	Length of Longest Fibonacci Subsequence	Medium
LC0876.cpp	Middle of the Linked List	Easy
LC0877.cpp	Stone Game	Medium
LC0885.cpp	Spiral Matrix III	Medium
LC0886.cpp	Possible Bipartition	Medium
LC0889.cpp	Construct Binary Tree from Preorder and Postorder Traversal	Medium
LC0890.cpp	Find and Replace Pattern	Medium
LC0901.cpp	Online Stock Span	Medium
LC0905.cpp	Sort Array By Parity	Easy
LC0906.cpp	Super Palindromes	Hard
LC0914.cpp	X of a Kind in a Deck of Cards	Easy
LC0916.cpp	Word Subsets	Medium
LC0917.cpp	Reverse Only Letters	Easy
LC0918.cpp	Maximum Sum Circular Subarray	Medium
LC0921.cpp	Minimum Add to Make Parentheses Valid	Medium
LC0922.cpp	Sort Array By Parity II	Easy
LC0929.cpp	Unique Email Addresses	Easy
LC0933.cpp	Number of Recent Calls	Easy
LC0938.cpp	Range Sum of BST	Easy
LC0941.cpp	Valid Mountain Array	Easy
LC0949.cpp	Largest Time for Given Digits	Easy
LC0952.cpp	Largest Component Size by Common Factor	Hard
LC0953.cpp	Verifying an Alien Dictionary	Easy
LC0957.cpp	Prison Cells After N Days	Medium
LC0961.cpp	N-Repeated Element in Size 2N Array	Easy
LC0965.cpp	Univalued Binary Tree	Easy
LC0967.cpp	Numbers With Same Consecutive Differences	Medium
LC0968.cpp	Binary Tree Cameras	Hard
LC0969.cpp	Pancake Sorting	Medium
LC0970.cpp	Powerful Integers	Medium
LC0973.cpp	K Closest Points to Origin	Medium
LC0976.cpp	Largest Perimeter Triangle	Easy
LC0977.cpp	Squares of a Sorted Array	Easy
LC0980.cpp	Unique Paths III	Hard
LC0983.cpp	Minimum Cost For Tickets	Medium
LC0986.cpp	Interval List Intersections	Medium
LC0987.cpp	Vertical Order Traversal of a Binary Tree	Medium
LC0991.cpp	Broken Calculator	Medium
LC0993.cpp	Cousins in Binary Tree	Easy
LC0994.cpp	Rotting Oranges	Medium
LC0997.cpp	Find the Town Judge	Easy
LC1002.cpp	Find Common Characters	Easy
LC1004.cpp	Max Consecutive Ones III	Medium
LC1005.cpp	Maximize Sum Of Array After K Negations	Easy
LC1008.cpp	Construct Binary Search Tree from Preorder Traversal	Medium
LC1009.cpp	Complement of Base 10 Integer	Easy
LC1021.cpp	Remove Outermost Parentheses	Easy
LC1022.cpp	Sum of Root To Leaf Binary Numbers	Easy
LC1025.cpp	Divisor Game	Easy
LC1029.cpp	Two City Scheduling	Easy
LC1030.cpp	Matrix Cells in Distance Order	Easy
LC1032.cpp	Stream of Characters	Hard
LC1035.cpp	Uncrossed Lines	Medium
LC1038.cpp	Binary Search Tree to Greater Sum Tree	Medium
LC1041.cpp	Robot Bounded In Circle	Medium
LC1043.cpp	Partition Array for Maximum Sum	Medium
LC1044.cpp	Longest Duplicate Substring	Hard
LC1046.cpp	Last Stone Weight	Easy
LC1047.cpp	Remove All Adjacent Duplicates In String	Easy
LC1048.cpp	Longest String Chain	Medium
LC1051.cpp	Height Checker	Easy
LC1071.cpp	Greatest Common Divisor of Strings	Easy
LC1074.cpp	Number of Submatrices That Sum to Target	Hard
LC1089.cpp	Duplicate Zeros	Easy
LC1094.cpp	Car Pooling	Medium
LC1103.cpp	Distribute Candies to People	Easy
LC1108.cpp	Defanging an IP Address	Easy
LC1122.cpp	Relative Sort Array	Easy
LC1137.cpp	N-th Tribonacci Number	Easy
LC1143.cpp	Longest Common Subsequence	Medium
LC1160.cpp	Find Words That Can Be Formed by Characters	Easy
LC1175.cpp	Prime Arrangements	Easy
LC1189.cpp	Maximum Number of Balloons	Easy
LC1190.cpp	Reverse Substrings Between Each Pair of Parentheses	Medium
LC1191.cpp	K-Concatenation Maximum Sum	Medium
LC1192.cpp	Critical Connections in a Network	Hard
LC1200.cpp	Minimum Absolute Difference	Easy
LC1201.cpp	Ugly Number III	Medium
LC1202.cpp	Smallest String With Swaps	Medium
LC1207.cpp	Unique Number of Occurrences	Easy
LC1208.cpp	Get Equal Substrings Within Budget	Medium
LC1209.cpp	Remove All Adjacent Duplicates in String II	Medium
LC1217.cpp	Minimum Cost to Move Chips to The Same Position	Easy
LC1218.cpp	Longest Arithmetic Subsequence of Given Difference	Medium
LC1219.cpp	Path with Maximum Gold	Medium
LC1220.cpp	Count Vowels Permutation	Hard
LC1221.cpp	Split a String in Balanced Strings	Easy
LC1222.cpp	Queens That Can Attack the King	Medium
LC1229.cpp	Meeting Scheduler	Medium
LC1230.cpp	Toss Strange Coins	Medium
LC1232.cpp	Check If It Is a Straight Line	Easy
LC1233.cpp	Remove Sub-Folders from the Filesystem	Medium
LC1237.cpp	Find Positive Integer Solution for a Given Equation	Easy
LC1238.cpp	Circular Permutation in Binary Representation	Medium
LC1239.cpp	Maximum Length of a Concatenated String with Unique Characters	Medium
LC1247.cpp	Minimum Swaps to Make Strings Equal	Easy
LC1248.cpp	Count Number of Nice Subarrays	Medium
LC1249.cpp	Minimum Remove to Make Valid Parentheses	Medium
LC1250.cpp	Check If It Is a Good Array	Hard
LC1252.cpp	Cells with Odd Values in a Matrix	Easy
LC1260.cpp	Shift 2D Grid	Easy
LC1261.cpp	Find Elements in a Contaminated Binary Tree	Medium
LC1262.cpp	Greatest Sum Divisible by Three	Medium
LC1263.cpp	Minimum Moves to Move a Box to Their Target Location	Hard
LC1266.cpp	Minimum Time Visiting All Points	Easy
LC1267.cpp	Count Servers that Communicate	Medium
LC1268.cpp	Search Suggestions System	Medium
LC1269.cpp	Number of Ways to Stay in the Same Place After Some Steps	Hard
LC1275.cpp	Find Winner on a Tic Tac Toe Game	Easy
LC1276.cpp	Number of Burgers with No Waste of Ingredients	Medium
LC1277.cpp	Count Square Submatrices with All Ones	Medium
LC1278.cpp	Palindrome Partitioning III	Hard
LC1281.cpp	Subtract the Product and Sum of Digits of an Integer	Easy
LC1282.cpp	Group the People Given the Group Size They Belong To	Medium
LC1283.cpp	Find the Smallest Divisor Given a Threshold	Medium
LC1284.cpp	Minimum Number of Flips to Convert Binary Matrix to Zero Matrix	Hard
LC1286.cpp	Iterator for Combination	Medium
LC1287.cpp	Element Appearing More Than 25% In Sorted Array	Easy
LC1288.cpp	Remove Covered Intervals	Medium
LC1289.cpp	Minimum Falling Path Sum II	Hard
LC1290.cpp	Convert Binary Number in a Linked List to Integer	Easy
LC1291.cpp	Sequential Digits	Medium
LC1292.cpp	Maximum Side Length of a Square with Sum Less than or Equal to Threshold	Medium
LC1295.cpp	Find Numbers with Even Number of Digits	Easy
LC1296.cpp	Divide Array in Sets of K Consecutive Numbers	Medium
LC1297.cpp	Maximum Number of Occurrences of a Substring	Medium
LC1298.cpp	Maximum Candies You Can Get from Boxes	Hard
LC1299.cpp	Replace Elements with Greatest Element on Right Side	Easy
LC1300.cpp	Sum of Mutated Array Closest to Target	Medium
LC1301.cpp	Number of Paths with Max Score	Hard
LC1302.cpp	Deepest Leaves Sum	Medium
LC1304.cpp	Find N Unique Integers Sum up to Zero	Easy
LC1305.cpp	All Elements in Two Binary Search Trees	Medium
LC1306.cpp	Jump Game III	Medium
LC1309.cpp	Decrypt String from Alphabet to Integer Mapping	Easy
LC1310.cpp	XOR Queries of a Subarray	Medium
LC1311.cpp	Get Watched Videos by Your Friends	Medium
LC1312.cpp	Minimum Insertion Steps to Make a String Palindrome	Hard
LC1313.cpp	Decompress Run-Length Encoded List	Easy
LC1314.cpp	Matrix Block Sum	Medium
LC1315.cpp	Sum of Nodes with Even-Valued Grandparent	Medium
LC1317.cpp	Convert Integer to the Sum of Two No-Zero Integers	Easy
LC1318.cpp	Minimum Flips to Make a OR b Equal to c	Medium
LC1319.cpp	Number of Operations to Make Network Connected	Medium
LC1324.cpp	Print Words Vertically	Medium
LC1328.cpp	Break a Palindrome	Medium
LC1329.cpp	Sort the Matrix Diagonally	Medium
LC1331.cpp	Rank Transform of an Array	Easy
LC1337.cpp	The K Weakest Rows in a Matrix	Easy
LC1338.cpp	Reduce Array Size to The Half	Medium
LC1342.cpp	Number of Steps to Reduce a Number to Zero	Easy
LC1343.cpp	Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold	Medium
LC1344.cpp	Angle Between Hands of a Clock	Medium
LC1346.cpp	Check If N and Its Double Exist	Easy
LC1354.cpp	Construct Target Array With Multiple Sums	Hard
LC1356.cpp	Sort Integers by The Number of 1 Bits	Easy
LC1357.cpp	Apply Discount Every n Orders	Medium
LC1358.cpp	Number of Substrings Containing All Three Characters	Medium
LC1359.cpp	Count All Valid Pickup and Delivery Options	Hard
LC1365.cpp	How Many Numbers Are Smaller Than the Current Number	Easy
LC1370.cpp	Increasing Decreasing String	Easy
LC1371.cpp	Find the Longest Substring Containing Vowels in Even Counts	Medium
LC1372.cpp	Longest ZigZag Path in a Binary Tree	Medium
LC1373.cpp	Maximum Sum BST in Binary Tree	Hard
LC1374.cpp	Generate a String With Characters That Have Odd Counts	Easy
LC1375.cpp	Bulb Switcher III	Medium
LC1380.cpp	Lucky Numbers in a Matrix	Easy
LC1381.cpp	Design a Stack With Increment Operation	Medium
LC1382.cpp	Balance a Binary Search Tree	Medium
LC1383.cpp	Maximum Performance of a Team	Hard
LC1385.cpp	Find the Distance Value Between Two Arrays	Easy
LC1386.cpp	Cinema Seat Allocation	Medium
LC1387.cpp	Sort Integers by The Power Value	Medium
LC1389.cpp	Create Target Array in the Given Order	Easy
LC1390.cpp	Four Divisors	Medium
LC1391.cpp	Check if There is a Valid Path in a Grid	Medium
LC1392.cpp	Longest Happy Prefix	Hard
LC1394.cpp	Find Lucky Integer in an Array	Easy
LC1395.cpp	Count Number of Teams	Medium
LC1396.cpp	Design Underground System	Medium
LC1399.cpp	Count Largest Group	Easy
LC1400.cpp	Construct K Palindrome Strings	Medium
LC1401.cpp	Circle and Rectangle Overlapping	Medium
LC1402.cpp	Reducing Dishes	Hard
LC1408.cpp	String Matching in an Array	Easy
LC1409.cpp	Queries on a Permutation With Key	Medium
LC1410.cpp	HTML Entity Parser	Medium
LC1411.cpp	Number of Ways to Paint N × 3 Grid	Hard
LC1423.cpp	Maximum Points You Can Obtain from Cards	Medium
LC1426.cpp	Counting Elements	Easy
LC1427.cpp	Perform String Shifts	Easy
LC1428.cpp	Leftmost Column with at Least a One	Medium
LC1429.cpp	First Unique Number	Medium
LC1430.cpp	Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree	Medium
LC1431.cpp	Kids With the Greatest Number of Candies	Easy
LC1436.cpp	Destination City	Easy
LC1446.cpp	Consecutive Characters	Easy
LC1450.cpp	Number of Students Doing Homework at a Given Time	Easy
LC1460.cpp	Make Two Arrays Equal by Reversing Sub-arrays	Easy
LC1461.cpp	Check If a String Contains All Binary Codes of Size K	Medium
LC1462.cpp	Course Schedule IV	Medium
LC1463.cpp	Cherry Pickup II	Hard
LC1464.cpp	Maximum Product of Two Elements in an Array	Easy
LC1465.cpp	Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts	Medium
LC1466.cpp	Reorder Routes to Make All Paths Lead to the City Zero	Medium
LC1467.cpp	Probability of a Two Boxes Having The Same Number of Distinct Balls	Hard
LC1470.cpp	Shuffle the Array	Easy
LC1475.cpp	Final Prices With a Special Discount in a Shop	Easy
LC1476.cpp	Subrectangle Queries	Medium
LC1480.cpp	Running Sum of 1d Array	Easy
LC1481.cpp	Least Number of Unique Integers after K Removals	Medium
LC1482.cpp	Minimum Number of Days to Make m Bouquets	Medium
LC1483.cpp	Kth Ancestor of a Tree Node	Hard
LC1504.cpp	Count Submatrices With All Ones	Medium
LC1508.cpp	Range Sum of Sorted Subarray Sums	Medium
LC1512.cpp	Number of Good Pairs	Easy
LC1518.cpp	Water Bottles	Easy
LC1528.cpp	Shuffle String	Easy
LC1534.cpp	Count Good Triplets	Easy
LC1535.cpp	Find the Winner of an Array Game	Medium
LC1536.cpp	Minimum Swaps to Arrange a Binary Grid	Medium
LC1537.cpp	Get the Maximum Score	Hard
LC1539.cpp	Kth Missing Positive Number	Easy
LC1540.cpp	Can Convert String in K Moves	Medium
LC1541.cpp	Minimum Insertions to Balance a Parentheses String	Medium
LC1542.cpp	Find Longest Awesome Substring	Hard
LC1544.cpp	Make The String Great	Easy
LC1545.cpp	Find Kth Bit in Nth Binary String	Medium
LC1546.cpp	Maximum Number of Non-Overlapping Subarrays With Sum Equals Target	Medium
LC1547.cpp	Minimum Cost to Cut a Stick	Hard
LC1550.cpp	Three Consecutive Odds	Easy
LC1566.cpp	Detect Pattern of Length M Repeated K or More Times	Easy
LC1567.cpp	Maximum Length of Subarray With Positive Product	Medium
LC1568.cpp	Minimum Number of Days to Disconnect Island	Hard
LC1569.cpp	Number of Ways to Reorder Array to Get Same BST	Hard
LC1572.cpp	Matrix Diagonal Sum	Easy
LC1576.cpp	Replace All ?'s to Avoid Consecutive Repeating Characters	Easy
LC1577.cpp	Number of Ways Where Square of Number Is Equal to Product of Two Numbers	Medium
LC1578.cpp	Minimum Deletion Cost to Avoid Repeating Letters	Medium
LC1579.cpp	Remove Max Number of Edges to Keep Graph Fully Traversable	Hard
LC1588.cpp	Sum of All Odd Length Subarrays	Easy
LC1603.cpp	Design Parking System	Easy
LC1608.cpp	Special Array With X Elements Greater Than or Equal X	Easy
LC1614.cpp	Maximum Nesting Depth of the Parentheses	Easy
LC1619.cpp	Mean of Array After Removing Some Elements	Easy
LC1636.cpp	Sort Array by Increasing Frequency	Easy
LC1640.cpp	Check Array Formation Through Concatenation	Easy
LC1646.cpp	Get Maximum in Generated Array	Easy
LC1656.cpp	Design an Ordered Stream	Easy
LC1662.cpp	Check If Two String Arrays are Equivalent	Easy
LC1670.cpp	Design Circular Queue	Medium
LC1672.cpp	Richest Customer Wealth	Easy
LC1678.cpp	Goal Parser Interpretation	Easy
LC1684.cpp	Count the Number of Consistent Strings	Easy
LC1688.cpp	Count of Matches in Tournament	Easy
LC1689.cpp	Partitioning Into Minimum Number Of Deci-Binary Numbers	Medium
LC1694.cpp	Reformat Phone Number	Easy
LC1695.cpp	Maximum Erasure Value	Medium
LC1696.cpp	Jump Game VI	Medium
LC1704.cpp	Determine if String Halves Are Alike	Easy
LC1710.cpp	Maximum Units on a Truck	Easy
LC1720.cpp	Decode XORed Array	Easy
LC1721.cpp	Swapping Nodes in a Linked List	Medium
LC1732.cpp	Find the Highest Altitude	Easy
LC1748.cpp	Sum of Unique Elements	Easy
LC1763.cpp	Longest Nice Substring	Easy
LC1768.cpp	Merge Strings Alternately	Easy
LC1781.cpp	Sum of Beauty of All Substrings	Medium
LC1812.cpp	Determine Color of a Chessboard Square	Easy
LC1816.cpp	Truncate Sentence	Easy
LC1822.cpp	Sign of the Product of an Array	Easy
LC1827.cpp	Minimum Operations to Make the Array Increasing	Easy
LC1828.cpp	Queries on Number of Points Inside a Circle	Medium
LC1832.cpp	Check if the Sentence Is Pangram	Easy
LC1833.cpp	Maximum Ice Cream Bars	Medium
LC1837.cpp	Sum of Digits in Base K	Easy
LC1844.cpp	Replace All Digits with Characters	Easy
LC1848.cpp	Minimum Distance to the Target Element	Easy