- 1. Two Sum
- 2. Add Two Numbers
- 9. Palindrome Number
- 14. Longest Common Prefix
- 20. Valid Parentheses
- 21. Merge Two Sorted Lists
- 26. Remove Duplicates from Sorted Array
- 27. Remove Element
- 28. Implement strStr()
- 35. Search Insert Position
- 58. Length of Last Word
- 66. Plus One
- 67. Add Binary
- 83. Remove Duplicates from Sorted List
- 94. Binary Tree Inorder Traversal
- 100. Same Tree
- 104. Maximum Depth of Binary Tree
- 118. Pascal's Triangle
- 119. Pascal's Triangle II
- 121. Best Time to Buy and Sell Stock
- 125. Valid Palindrome
- 136. Single Number
- 144. Binary Tree Preorder Traversal
- 145. Binary Tree Postorder Traversal
- 155. Min Stack
- 169. Majority Element
- 171. Excel Sheet Column Number
- 175. Combine Two Tables
- 181. Employees Earning More Than Their Managers
- 182. Duplicate Emails
- 183. Customers Who Never Order
- 191. Number of 1 Bits
- 195. Tenth Line
- 196. Delete Duplicate Emails
- 202. Happy Number
- 206. Reverse Linked List
- 217. Contains Duplicate
- 225. Implement Stack using Queues
- 232. Implement Queue using Stacks
- 242. Valid Anagram
- 257. Binary Tree Paths
- 258. Add Digits
- 268. Missing Number
- 278. First Bad Version
- 283. Move Zeroes
- 290. Word Pattern
- 292. Nim Game
- 303. Range Sum Query - Immutable
- 338. Counting Bits
- 344. Reverse String
- 349. Intersection of Two Arrays
- 350. Intersection of Two Arrays II
- 374. Guess Number Higher or Lower
- 383. Ransom Note
- 387. First Unique Character in a String
- 404. Sum of Left Leaves
- 412. Fizz Buzz
- 448. Find All Numbers Disappeared in an Array
- 461. Hamming Distance
- 476. Number Complement
- 485. Max Consecutive Ones
- 495. Teemo Attacking
- 500. Keyboard Row
- 506. Relative Ranks
- 509. Fibonacci Number
- 511. Game Play Analysis I
- 520. Detect Capital
- 557. Reverse Words in a String III
- Reshape the Matrix
- 575. Distribute Candies
- 584. Find Customer Referee
- 586. Customer Placing the Largest Number of Orders
- 589. N-ary Tree Preorder Traversal
- 590. N-ary Tree Postorder Traversal
- 595. Big Countries
- 607. Sales Person
- 620. Not Boring Movies
- 627. Swap Salary
- 653. Two Sum IV - Input is a BST
- 657. Robot Return to Origin
- 682. Baseball Game
- 693. Binary Number with Alternating Bits
- 700. Search in a Binary Search Tree
- 705. Design HashSet
- 709. To Lower Case
- 728. Self Dividing Numbers
- 762. Prime Number of Set Bits in Binary Representation
- 766. Toeplitz Matrix
- 771. Jewels and Stones
- 804. Unique Morse Code Words
- 806. Number of Lines To Write String
- 832. Flipping an Image
- 852. Peak Index in a Mountain Array
- 867. Transpose Matrix
- 868. Binary Gap
- 876. Middle of the Linked List
- 884. Uncommon Words from Two Sentences
- 896. Monotonic Array
- 905. Sort Array By Parity
- 908. Smallest Range I
- 917. Reverse Only Letters
- 922. Sort Array By Parity II
- 929. Unique Email Addresses
- 933. Number of Recent Calls
- 938. Range Sum of BST
- 944. Delete Columns to Make Sorted
- 961. N-Repeated Element in Size 2N Array
- 965. Univalued Binary Tree
- 977. Squares of a Sorted Array
- 1002. Find Common Characters
- 1009. Complement of Base 10 Integer
- 1021. Remove Outermost Parentheses
- 1025. Divisor Game
- 1046. Last Stone Weight
- 1047. Remove All Adjacent Duplicates In String
- 1051. Height Checker
- 1078. Occurrences After Bigram
- 1122. Relative Sort Array
- 1137. N-th Tribonacci Number
- 1148. Article Views I
- 1160. Find Words That Can Be Formed by Characters
- 1179. Reformat Department Table
- 1185. Day of the Week
- 1189. Maximum Number of Balloons
- 1200. Minimum Absolute Difference
- 1207. Unique Number of Occurrences
- 1221. Split a String in Balanced Strings
- 1252. Cells with Odd Values in a Matrix
- 1260. Shift 2D Grid
- 1266. Minimum Time Visiting All Points
- 1281. Subtract the Product and Sum of Digits of an Integer
- 1287. Element Appearing More Than 25% In Sorted Array
- 1290. Convert Binary Number in a Linked List to Integer
- 1295. Find Numbers with Even Number of Digits
- 1299. Replace Elements with Greatest Element on Right Side
- 1304. Find N Unique Integers Sum up to Zero
- 1309. Decrypt String from Alphabet to Integer Mapping
- 1313. Decompress Run-Length Encoded List
- 1323. Maximum 69 Number
- 1337. The K Weakest Rows in a Matrix
- 1342. Number of Steps to Reduce a Number to Zero
- 1351. Count Negative Numbers in a Sorted Matrix
- 1356. Sort Integers by The Number of 1 Bits
- 1365. How Many Numbers Are Smaller Than the Current Number
- 1374. Generate a String With Characters That Have Odd Counts
- 1380. Lucky Numbers in a Matrix
- 1385. Find the Distance Value Between Two Arrays
- 1389. Create Target Array in the Given Order
- 1393. Capital Gain/Loss
- 1394. Find Lucky Integer in an Array
- 1399. Count Largest Group
- 1407. Top Travellers
- 1408. String Matching in an Array
- 1413. Minimum Value to Get Positive Step by Step Sum
- 1417. Reformat The String
- 1422. Maximum Score After Splitting a String
- 1431. Kids With the Greatest Number of Candies
- 1436. Destination City
- 1437. Check If All 1's Are at Least Length K Places Away
- 1441. Build an Array With Stack Operations
- 1446. Consecutive Characters
- 1450. Number of Students Doing Homework at a Given Time
- [1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence](1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence)
- 1460. Make Two Arrays Equal by Reversing Sub-arrays
- 1464. Maximum Product of Two Elements in an Array
- 1470. Shuffle the Array
- 1476. Subrectangle Queries
- 1480. Running Sum of 1d Array
- 1484. Group Sold Products By The Date
- 1486. XOR Operation in an Array
- 1491. Average Salary Excluding the Minimum and Maximum Salary
- 1496. Path Crossing
- 1050. Actors and Directors Who Cooperated At Least Three Times
- 1507. Reformat Date
- 1512. Number of Good Pairs
- 1518. Water Bottles
- 1528. Shuffle String
- 1550. Three Consecutive Odds
- 1572. Matrix Diagonal Sum
- 1581. Customer Who Visited but Did Not Make Any Transactions
- 1587. Bank Account Summary II
- 1588. Sum of All Odd Length Subarrays
- 1603. Design Parking System
- 1614. Maximum Nesting Depth of the Parentheses
- 1619. Mean of Array After Removing Some Elements
- 1629. Slowest Key
- 1636. Sort Array by Increasing Frequency
- 1656. Design an Ordered Stream
- 1662. Check If Two String Arrays are Equivalent
- 1667. Fix Names in a Table
- 1672. Richest Customer Wealth
- 1678. Goal Parser Interpretation
- 1684. Count the Number of Consistent Strings
- 1688. Count of Matches in Tournament
- 1693. Daily Leads and Partners
- 1704. Determine if String Halves Are Alike
- 1710. Maximum Units on a Truck
- 1716. Calculate Money in Leetcode Bank
- 1720. Decode XORed Array
- 1725. Number Of Rectangles That Can Form The Largest Square
- 1729. Find Followers Count
- 1732. Find the Highest Altitude
- 1741. Find Total Time Spent by Each Employee
- 1748. Sum of Unique Elements
- 1758. Minimum Changes To Make Alternating Binary String
- 1768. Merge Strings Alternately
- 1773. Count Items Matching a Rule
- 1779. Find Nearest Point That Has the Same X or Y Coordinate
- 1757. Recyclable and Low Fat Products
- 1791. Find Center of Star Graph
- 1795. Rearrange Products Table
- 1800. Maximum Ascending Subarray Sum
- 1812. Determine Color of a Chessboard Square
- 1816. Truncate Sentence
- 1822. Sign of the Product of an Array
- 1827. Minimum Operations to Make the Array Increasing
- 1828. Queries on Number of Points Inside a Circle
- 1832. Check if the Sentence Is Pangram
- 1837. Sum of Digits in Base K
- 1844. Replace All Digits with Characters
- 1869. Longer Contiguous Segments of Ones than Zeros
- 1873. Calculate Special Bonus
- 1876. Substrings of Size Three with Distinct Characters
- 1859. Sorting the Sentence
- 1880. Check if Word Equals Summation of Two Words
- 1886. Determine Whether Matrix Can Be Obtained By Rotation
- 1890. The Latest Login in 2020
- 1903. Largest Odd Number in String
- 1913. Maximum Product Difference Between Two Pairs
- 1920. Build Array from Permutation
- 1925. Count Square Sum Triples
- 1929. Concatenation of Array
- 1941. Check if All Characters Have Equal Number of Occurrences
- 1945. Sum of Digits of String After Convert
- 1952. Three Divisors
- 1957. Delete Characters to Make Fancy String
- 1965. Employees With Missing Information
- 1979. Find Greatest Common Divisor of Array
- 1967. Number of Strings That Appear as Substrings in Word
- 1991. Find the Middle Index in Array
- 1995. Count Special Quadruplets
- 2000. Reverse Prefix of Word
- 2006. Count Number of Pairs With Absolute Difference K
- 2011. Final Value of Variable After Performing Operations
- 2022. Convert 1D Array Into 2D Array
- 2032. Two Out of Three
- 2042. Check if Numbers Are Ascending in a Sentence
- 2053. Kth Distinct String in an Array
- 2057. Smallest Index With Equal Value
- 2062. Count Vowel Substrings of a String
- 2068. Check Whether Two Strings are Almost Equivalent
- 2073. Time Needed to Buy Tickets
- 2078. Two Furthest Houses With Different Colors
- 2085. Count Common Words With One Occurrence
- 2089. Find Target Indices After Sorting Array
- 2103. Rings and Rods
- 2108. Find First Palindromic String in the Array
- 2114. Maximum Number of Words Found in Sentences
- 2119. A Number After a Double Reversal
- 2124. Check if All A's Appears Before All B's
- 2129. Capitalize the Title
- Minimum Cost of Buying Candies With Discount
- 2154. Keep Multiplying Found Values by Two
- 2160. Minimum Sum of Four Digit Number After Splitting Digits
- 2164. Sort Even and Odd Indices Independently
- 2169. Count Operations to Obtain Zero
- 2176. Count Equal and Divisible Pairs in an Array
- 2180. Count Integers With Even Digit Sum
- 2185. Counting Words With a Given Prefix
- 2190. Most Frequent Number Following Key In an Array
- 2194. Cells in a Range on an Excel Sheet
- 2200. Find All K-Distant Indices in an Array
- 2206. Divide Array Into Equal Pairs
- 2138. Divide a String Into Groups of Size k
- 2210. Count Hills and Valleys in an Array
- 2215. Find the Difference of Two Arrays
- 2220. Minimum Bit Flips to Convert Number
- 2224. Minimum Number of Operations to Convert Time
- 2231. Largest Number After Digit Swaps by Parity
- 2235. Add Two Integers
- 2236. Root Equals Sum of Children
- 2243. Calculate Digit Sum of a String
- 2248. Intersection of Multiple Arrays
- 2255. Count Prefixes of a Given String
- 2264. Largest 3-Same-Digit Number in String
- 2273. Find Resultant Array After Removing Anagrams
- 2278. Percentage of Letter in String
- 2283. Check if Number Has Equal Digit Count and Digit Value
- 2287. Rearrange Characters to Make Target String
- 2293. Min Max Game
- 2299. Strong Password Checker II
- 2303. Calculate Amount Paid in Taxes
- 2309. Greatest English Letter in Upper and Lower Case
- 2315. Count Asterisks
- 2319. Check if Matrix Is X-Matrix
- 2325. Decode the Message
- 2331. Evaluate Boolean Binary Tree
- 2367. Number of Arithmetic Triplets
- 2389. Longest Subsequence With Limited Sum
- 2341. Maximum Number of Pairs in Array
- 2351. First Letter to Appear Twice
- 2357. Make Array Zero by Subtracting Equal Amounts
- 2363. Merge Similar Items
- 2269. Find the K-Beauty of a Number
- 2395. Find Subarrays With Equal Sum
- 2418. Sort the People
- 2427. Number of Common Factors
- 2441. Largest Positive Integer That Exists With Its Negative
- 2451. Odd String Difference
- 2455. Average Value of Even Numbers That Are Divisible by Three
- 2460. Apply Operations to an Array
- 2465. Number of Distinct Averages
- 2485. Find the Pivot Integer
- 2490. Circular Sentence
- 2500. Delete Greatest Value in Each Row
- 2506. Count Pairs Of Similar Strings